corpus.blog
41554 blogs · [ { "id": "01a087ec-4125-7074-ab64-8c895c7a6fb1", "title": "How to Normalize Readings from Multiple Temperature Sensors (with a DIY heated water bath)", "url": "https://thecavepearlproject.org/2026/05/12/normalizing-a-group-of-temperature-sensors-with-a-sous-vide-cooker/", "published_at": "2026-05-12T22:30:56+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895cf254e9", "title": "Sync RTC time to a GPS & Setting the DS3231 Aging Offset Register to Reduce Clock Drift", "url": "https://thecavepearlproject.org/2024/10/22/setting-accurate-rtc-time-with-a-gps-the-ds3231-aging-offset-to-reduce-drift/", "published_at": "2024-10-23T01:25:41+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895d15bd5b", "title": "How to measure PAR (Photosynthetically Active Radiation) using a BH1750 Lux Sensor", "url": "https://thecavepearlproject.org/2024/08/10/using-a-bh1750-lux-sensor-to-measure-par/", "published_at": "2024-08-10T17:51:18+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895d33ab91", "title": "How to Normalize a Group of Pressure Sensors so they can be Deployed as a Set", "url": "https://thecavepearlproject.org/2024/05/01/how-to-normalize-a-set-of-pressure-sensors/", "published_at": "2024-05-01T16:21:22+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895d608b5c", "title": "How to calibrate NTC thermistors (A DIY method you can do at home)", "url": "https://thecavepearlproject.org/2024/04/20/a-practical-method-for-calibrating-ntc-thermistors/", "published_at": "2024-04-20T05:34:56+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895e0fb2a6", "title": "The e360: A DIY Classroom Data Logger for Science [2023]", "url": "https://thecavepearlproject.org/2023/12/01/the-e360-a-classroom-data-logger-for-science/", "published_at": "2023-12-01T17:02:01+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895e40b3f1", "title": "Testing Cr2032 Coin Cell Batteries with μA to mA pulsed duty cycles", "url": "https://thecavepearlproject.org/2023/06/05/testing-cr2032-battery-discharge-time-with-our-2-part-promini-loggers/", "published_at": "2023-06-05T19:03:53+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895f30a984", "title": "A DIY Pressure Chamber to Test Underwater Housings", "url": "https://thecavepearlproject.org/2023/05/24/a-diy-pressure-chamber-to-test-housings/", "published_at": "2023-05-25T04:44:25+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895f864fb7", "title": "“Too Ugly to Steal & Too Heavy to Carry” : Insights from a decade of rain gauge deployment", "url": "https://thecavepearlproject.org/2023/04/15/insights-from-a-decade-of-tipping-bucket-rain-gauge-deployment/", "published_at": "2023-04-15T23:19:17+00:00" }, { "id": "01a087ec-4125-7074-ab64-8c895feb977a", "title": "Waterproofing your Electronics Project", "url": "https://thecavepearlproject.org/2023/03/17/waterproofing-your-electronics-project/", "published_at": "2023-03-17T16:27:57+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78b01f03b", "title": "2-Part ProMini Logger that runs >1 year on a Coin Cell [2022]", "url": "https://thecavepearlproject.org/2022/03/09/powering-a-promini-logger-for-one-year-on-a-coin-cell/", "published_at": "2022-03-09T23:00:58+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78b38e529", "title": "Timing an LED light-sensor with Pin Change Interrupts", "url": "https://thecavepearlproject.org/2021/05/10/timing-an-led-light-sensor-with-pin-change-interrupts/", "published_at": "2021-05-10T15:00:51+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78b7daaaa", "title": "Enhance your Logger with an OLED & TTP223 Capacitive Touch Switch", "url": "https://thecavepearlproject.org/2021/03/01/enhance-your-logger-with-an-oled-t233-capacitive-touch-switch/", "published_at": "2021-03-01T19:27:12+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78bafff69", "title": "Adding two OLED displays to your Arduino logger (without a library)", "url": "https://thecavepearlproject.org/2020/11/15/adding-two-oled-displays-to-your-arduino-logger-with-no-library/", "published_at": "2020-11-15T15:10:33+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78c72c37f", "title": "Hacking a Capacitive Soil Moisture Sensor (v1.2) for Frequency Output", "url": "https://thecavepearlproject.org/2020/10/27/hacking-a-capacitive-soil-moisture-sensor-for-frequency-output/", "published_at": "2020-10-27T18:26:27+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78cbda919", "title": "Pro Mini Classroom Datalogger [2020 No-Solder Update]", "url": "https://thecavepearlproject.org/2020/10/22/pro-mini-classroom-datalogger-2020-update/", "published_at": "2020-10-22T17:18:32+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78d8da9a9", "title": "Using the ADS1115 16-bit differential ADC for Rapid Burst-Sampling", "url": "https://thecavepearlproject.org/2020/05/21/using-the-ads1115-in-continuous-mode-for-burst-sampling/", "published_at": "2020-05-21T18:10:58+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78e02f158", "title": "Building an ATmega 1284p based Data Logger", "url": "https://thecavepearlproject.org/2020/05/11/build-an-atmega-1284p-based-data-logger/", "published_at": "2020-05-12T00:59:21+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78ebcf110", "title": "DIY Data Logger Housing from PVC parts (2020 update)", "url": "https://thecavepearlproject.org/2020/04/08/diy-data-logger-housing-from-pvc-parts-2020-update/", "published_at": "2020-04-08T17:55:13+00:00" }, { "id": "01a0de86-0c7d-7290-a038-24f78ec5cc6c", "title": "Single Diode Temperature Sensor with Arduino ICU (& reverse-bias leakage)", "url": "https://thecavepearlproject.org/2019/11/04/single-diode-temperature-sensor-with-arduino-icu-via-reverse-bias-leakage/", "published_at": "2019-11-04T14:15:15+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd5135244f8", "title": "Creating a Normalized Vegetation Index Sensor with two LEDs", "url": "https://thecavepearlproject.org/2019/08/30/creating-a-normalized-vegetation-index-sensor-with-two-leds/", "published_at": "2019-08-30T21:16:14+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd513bca18a", "title": "How to make Resistive Sensor Readings with DIGITAL I/O pins", "url": "https://thecavepearlproject.org/2019/03/25/using-arduinos-input-capture-unit-for-high-resolution-sensor-readings/", "published_at": "2019-03-25T13:43:12+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd51414027a", "title": "‘No-Parts’ Temperature Measurement with Arduino Pro Mini", "url": "https://thecavepearlproject.org/2019/02/25/no-parts-temperature-measurement-with-arduino-pro-mini-to-0-005c-or-better/", "published_at": "2019-02-25T14:19:13+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd514fdd0e6", "title": "Easy 1-hour Pro Mini Classroom Datalogger [Feb 2019]", "url": "https://thecavepearlproject.org/2019/02/21/easy-1-hour-pro-mini-classroom-datalogger-build-update-feb-2019/", "published_at": "2019-02-21T15:24:33+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd5155eab21", "title": "Pro Mini Logger Project for the Classroom [ EDU Jan: 2019 ]", "url": "https://thecavepearlproject.org/2019/01/11/pro-mini-logger-project-for-the-classroom-edu-version-2-2019/", "published_at": "2019-01-12T02:48:30+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd5161660a0", "title": "Tutorial: Adding an SPI SSD1306 OLED to an Arduino Logger (without a library)", "url": "https://thecavepearlproject.org/2018/10/17/tutorial-adding-a-ssd1306-oled-screen-to-your-arduino-logger/", "published_at": "2018-10-17T07:34:05+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd5165b2e8b", "title": "Starting Points & Ideas for your Arduino STEM Curriculum", "url": "https://thecavepearlproject.org/2018/10/07/starting-points-ideas-for-an-arduino-stem-curriculum/", "published_at": "2018-10-07T16:44:15+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd517091295", "title": "Using Arduino’s Internal EEprom to Store Data & Screen Fonts", "url": "https://thecavepearlproject.org/2018/08/24/tutorial-using-the-arduinos-internal-eeprom-for-fonts-header-data/", "published_at": "2018-08-24T23:51:54+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd517d30162", "title": "Using the Nokia 5110 LCD with an Arduino Data Logger", "url": "https://thecavepearlproject.org/2018/05/18/adding-the-nokia-5110-lcd-to-your-arduino-data-logger/", "published_at": "2018-05-18T21:55:49+00:00" }, { "id": "01a0de98-4190-739f-b314-6fd5186ce945", "title": "Measuring Temperature by Comparing the Arduino System Clock to an RTC", "url": "https://thecavepearlproject.org/2018/02/03/measuring-temperature-with-two-clocks/", "published_at": "2018-02-03T21:21:15+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f171230cb7", "title": "The 2017 Cave Pearl Project ‘Year in Review’", "url": "https://thecavepearlproject.org/2018/01/02/the-2017-cave-pearl-project-year-in-review/", "published_at": "2018-01-03T05:34:12+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f171bdba96", "title": "Tutorial: Adding Sensors ( & Modules ) to Your Arduino Data Logger", "url": "https://thecavepearlproject.org/2017/12/17/adding-sensors-to-an-arduino-data-logger/", "published_at": "2017-12-17T17:34:09+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f171f04653", "title": "Bil A. Phillips: an Explorer, a Teacher, and a Friend", "url": "https://thecavepearlproject.org/2017/11/27/bil-a-phillips-an-explorer-a-teacher-and-a-friend/", "published_at": "2017-11-28T02:25:18+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f172b799b5", "title": "Tutorial: How to Control I²C Sensors with Arduino Code", "url": "https://thecavepearlproject.org/2017/11/03/configuring-i2c-sensors-with-arduino/", "published_at": "2017-11-03T22:04:57+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f172cc62ec", "title": "Measuring EC ( electrical conductivity ) with Arduino", "url": "https://thecavepearlproject.org/2017/08/12/measuring-electrical-conductivity-with-an-arduino-part1-overview/", "published_at": "2017-08-13T01:13:17+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f1737fe08e", "title": "Arduino Pro Mini Data Logger : Add Screw-Terminal Board (2017 Update)", "url": "https://thecavepearlproject.org/2017/06/19/arduino-data-logger-2017-build-update/", "published_at": "2017-06-20T04:56:21+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f1740557c2", "title": "Cutting Power to Secure Digital Media cards for Low Current Data Logging", "url": "https://thecavepearlproject.org/2017/05/21/switching-off-sd-cards-for-low-power-data-logging/", "published_at": "2017-05-21T15:27:32+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f174a5ac14", "title": "Tutorial: Calibrating Oversampled Thermistors on an Arduino Pro Mini", "url": "https://thecavepearlproject.org/2017/04/26/calibrating-oversampled-thermistors-with-an-arduino/", "published_at": "2017-04-26T05:17:46+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f174f41a5e", "title": "Give your Arduino a high resolution ADC by Oversampling with noise (from a toggled pin)", "url": "https://thecavepearlproject.org/2017/02/27/enhancing-arduinos-adc-resolution-by-dithering-oversampling/", "published_at": "2017-02-27T17:46:11+00:00" }, { "id": "01a0dead-f64e-735b-ad66-c8f175f0b181", "title": "The 2016 Cave Pearl Project ‘Year in Review’", "url": "https://thecavepearlproject.org/2017/01/07/the-2016-cave-pearl-project-year-in-review/", "published_at": "2017-01-08T05:01:52+00:00" }, { "id": "01a0debf-f289-7220-89e7-c82ce8bba17f", "title": "Arduino Pro Mini Data Logger : with Dupont Jumpers (2016 Update)", "url": "https://thecavepearlproject.org/2016/10/27/diy-arduino-promini-data-logger-2016-build-update/", "published_at": "2016-10-27T16:05:08+00:00" }, { "id": "01a0debf-f289-7220-89e7-c82ce90d9324", "title": "Field Report 2016-07-09: I²C pressure sensors work on 20m long cables!", "url": "https://thecavepearlproject.org/2016/09/21/field-report-2016-07-09-i2c-pressure-sensors-work-on-20m-cables/", "published_at": "2016-09-22T03:43:25+00:00" }, { "id": "01a0debf-f289-7220-89e7-c82ce930001a", "title": "Tutorial: Using the Arduino UNO Serial Plotter for Live Data Acquisition", "url": "https://thecavepearlproject.org/2016/08/15/using-the-arduino-uno-as-a-basic-data-acquisition-system/", "published_at": "2016-08-15T22:09:50+00:00" }, { "id": "01a0debf-f289-7220-89e7-c82cea15e138", "title": "Build your own Arduino Starter Kit for the Classroom", "url": "https://thecavepearlproject.org/2016/08/08/build-your-own-arduino-classroom/", "published_at": "2016-08-08T15:28:40+00:00" }, { "id": "01a0debf-f289-7220-89e7-c82cea4084fe", "title": "Tutorial: Better Thermistor Measurement on Arduino via Series Resistors & Aref", "url": "https://thecavepearlproject.org/2016/06/09/better-thermistor-readings-with-an-arduino-series-resistors-aref/", "published_at": "2016-06-10T00:31:22+00:00" }, { "id": "01a0debf-f28a-70e9-b00d-e00424496e62", "title": "Field Report 2016-03-28: Oldest Generation of Loggers Retired", "url": "https://thecavepearlproject.org/2016/05/11/field-report-2016-03-28-oldest-generation-of-loggers-retired/", "published_at": "2016-05-12T00:09:22+00:00" }, { "id": "01a0debf-f28a-70e9-b00d-e00424c6d8a4", "title": "Field Report 2016-03-27: Progress on the 1-Wire DS18B20 Temperature Strings", "url": "https://thecavepearlproject.org/2016/05/01/field-report-2016-03-27-progress-on-the-ds18b20-temp-strings/", "published_at": "2016-05-01T17:05:46+00:00" }, { "id": "01a0debf-f28a-70e9-b00d-e004251698c8", "title": "Field Report 2016-03-25: Collecting Data in Coastal Mangroves", "url": "https://thecavepearlproject.org/2016/04/19/field-report-2016-03-25-monitoring-in-coastal-mangroves/", "published_at": "2016-04-19T21:36:40+00:00" }, { "id": "01a0debf-f28a-70e9-b00d-e00425249890", "title": "Field Report 2016-03-17: MCP9808 Temperature Sensor Fails Under Pressure", "url": "https://thecavepearlproject.org/2016/04/06/field-report-2016-03-17-mcp9808-fails-under-pressure/", "published_at": "2016-04-06T15:06:26+00:00" }, { "id": "01a0debf-f28a-70e9-b00d-e004260cad9f", "title": "Field Report 2016-03-16: Rain Gauges Over Reporting", "url": "https://thecavepearlproject.org/2016/04/05/field-report-2016-03-16-rain-gauges-over-reporting/", "published_at": "2016-04-05T19:39:52+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b70606b7681e", "title": "DS18B20 1-Wire calibration with Arduino: Finally nailed it!", "url": "https://thecavepearlproject.org/2016/03/05/ds18b20-calibration-we-finally-nailed-it/", "published_at": "2016-03-05T19:49:06+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b70606d2ee5c", "title": "Improving the Accuracy of 1-Wire DS18b20 Temperature Sensor Groups", "url": "https://thecavepearlproject.org/2016/02/12/triage-step-for-cheap-ds18b20-temperature-sensors/", "published_at": "2016-02-12T19:20:19+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b70607c9579b", "title": "Measuring battery discharge on an Arduino Data Logger", "url": "https://thecavepearlproject.org/2016/01/20/another-look-at-battery-discharge-curves/", "published_at": "2016-01-20T16:36:50+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b706082327bb", "title": "Field Report 2015-12-20: Winding Down…", "url": "https://thecavepearlproject.org/2016/01/13/field-report-2015-12-20-winding-down/", "published_at": "2016-01-13T18:43:10+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b70608c5ffb1", "title": "Field Report 2015-12-15: New DS18B20 1-Wire Sensor Chains Installed", "url": "https://thecavepearlproject.org/2016/01/10/field-report-2015-12-15-new-ds18b20-sensor-chains-installed/", "published_at": "2016-01-11T03:58:44+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b706091b4af9", "title": "Field Report 2015-12-14: Re-install the Drip Monitoring Network", "url": "https://thecavepearlproject.org/2016/01/10/field-report-2015-12-14-re-install-the-drip-monitoring-network/", "published_at": "2016-01-10T17:54:07+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b706097e6bc4", "title": "Field Report 2015-12-11: Flow sensors go Farther & Deeper", "url": "https://thecavepearlproject.org/2016/01/09/field-report-2015-12-11-flow-sensors-go-farther-deeper/", "published_at": "2016-01-09T15:51:55+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b7060a64e9eb", "title": "Field Report 2015-12-10: Sensor Precision vs Accuracy vs Drift", "url": "https://thecavepearlproject.org/2016/01/07/field-report-2015-12-10-precision-vs-accuracy-again/", "published_at": "2016-01-07T18:17:43+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b7060abee11b", "title": "Field Report 2015-12-08: The DIY Logging Rain Gauges Work!", "url": "https://thecavepearlproject.org/2016/01/05/field-report-2015-12-08-rain-gauge-success-at-rio-secreto/", "published_at": "2016-01-05T19:53:41+00:00" }, { "id": "01a0deda-eaa0-7079-a524-b7060b85aaeb", "title": "Arduino UNO Datalogger Project for Beginners (ie: no soldering)", "url": "https://thecavepearlproject.org/2015/12/22/arduino-uno-based-data-logger-with-no-soldering/", "published_at": "2015-12-23T00:19:20+00:00" }, { "id": "01a0def3-283d-7001-9f99-72b95049fb9e", "title": "Cave Pearl Data Loggers at GSA 2015", "url": "https://thecavepearlproject.org/2015/11/08/cave-pearl-loggers-presented-at-gsa-2015/", "published_at": "2015-11-08T17:10:30+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c1db36c9", "title": "Arduino Pro Mini Data Logger : Part 4 : Power Optimization (2015)", "url": "https://thecavepearlproject.org/2015/11/05/a-diy-arduino-data-logger-build-instructions-part-4-power-optimization/", "published_at": "2015-11-05T21:43:42+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c2afe55d", "title": "Arduino Pro Mini Data Logger : Part 3: Sensors & Housing (2015)", "url": "https://thecavepearlproject.org/2015/10/24/diy-arduino-logger-build-instructions-part-3/", "published_at": "2015-10-24T16:30:31+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c3256b5f", "title": "Arduino Pro Mini Data Logger : Part 2 : Logger Platform Assembly (2015)", "url": "https://thecavepearlproject.org/2015/10/24/diy-arduino-logger-build-instructions-part-2/", "published_at": "2015-10-24T06:24:28+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c34f6de6", "title": "Arduino Pro Mini Data Logger : Part 1: Component Preparation (2015)", "url": "https://thecavepearlproject.org/2015/10/24/diy-arduino-logger-build-instructions-part-1/", "published_at": "2015-10-24T05:52:04+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c3703eb6", "title": "Interview: Cave Pearl Project Team: 2015-09-20", "url": "https://thecavepearlproject.org/2015/09/20/interview-video-2015-09-20/", "published_at": "2015-09-20T15:46:01+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c3977cfe", "title": "Modeling the Effect of Drag Enhancement on Water Flow Measurements", "url": "https://thecavepearlproject.org/2015/09/03/how-the-drag-enhancer-affected-flow-meter-response/", "published_at": "2015-09-03T13:15:07+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c3bda1c7", "title": "Field Report 2015-08-17: Flow Sensors go back into Akumal Bay", "url": "https://thecavepearlproject.org/2015/09/02/field-report-2015-08-17-flow-sensors-go-back-into-akumal-bay/", "published_at": "2015-09-02T20:28:08+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c49671e7", "title": "Field Report 2015-08-14: Install New Sensors at RioSecreto", "url": "https://thecavepearlproject.org/2015/08/31/field-report-2015-08-14-install-new-sensors-at-riosecreto/", "published_at": "2015-09-01T02:26:10+00:00" }, { "id": "01a0def3-283e-71e3-80dc-9d17c4d3d4ea", "title": "Field Report 2015-08-12: Success with DS18B20 1-Wire Temperature Chains!", "url": "https://thecavepearlproject.org/2015/08/26/field-report-2015-08-12-success-with-ds18b20-temperature-strings/", "published_at": "2015-08-26T18:18:09+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-674780e535f3", "title": "Field Report 2015-08-10: Diagnosing a TMP102 Temperature Sensor Failure", "url": "https://thecavepearlproject.org/2015/08/26/field-report-2015-08-10-diagnosing-a-tmp102-temp-sensor-failure/", "published_at": "2015-08-26T15:37:37+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-67478148133d", "title": "Field Report 2015-08-07: Retrieve Flow Sensor from Akumal Bay", "url": "https://thecavepearlproject.org/2015/08/24/field-report-2015-08-07-retrieve-logger-from-akumal-bay/", "published_at": "2015-08-24T05:01:21+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-6747818ad559", "title": "Field Report 2015-08-06: Retrieve Drip Sensors from RioSecreto", "url": "https://thecavepearlproject.org/2015/08/21/field-report-2015-08-06-retrieve-sensors-from-riosecreto/", "published_at": "2015-08-21T13:34:35+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-67478232a15a", "title": "Measuring Humidity with Arduino: A Masons Hyrgometer Experiment", "url": "https://thecavepearlproject.org/2015/07/08/measuring-humidity-in-a-cave-a-masons-hyrgometer-experiment/", "published_at": "2015-07-08T21:19:52+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-674782db4a29", "title": "Measuring Power Use with Complex Data Logger Duty Cycles", "url": "https://thecavepearlproject.org/2015/06/28/testing-power-use-with-a-complex-duty-cycle/", "published_at": "2015-06-29T00:50:03+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-674783c05c1a", "title": "Developing an Arduino weather station…", "url": "https://thecavepearlproject.org/2015/06/15/developing-an-arduino-based-weather-station/", "published_at": "2015-06-15T17:24:15+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-67478487f17d", "title": "Tutorial: How to calibrate a compass (and accelerometer) with Arduino", "url": "https://thecavepearlproject.org/2015/05/22/calibrating-any-compass-or-accelerometer-for-arduino/", "published_at": "2015-05-23T00:36:00+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-67478558acbb", "title": "Field Report: 2015-03-23 Flow Sensor “drag fins” tested", "url": "https://thecavepearlproject.org/2015/04/20/field-report-2015-03-23-flow-sensor-drag-fins-tested/", "published_at": "2015-04-20T19:44:57+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-6747863e96d2", "title": "Field Report: 2015-03-18 One logger sacrificed to the sea gods.", "url": "https://thecavepearlproject.org/2015/04/15/field-report-2015-03-18-one-logger-sacrificed-to-the-sea-gods/", "published_at": "2015-04-15T15:34:45+00:00" }, { "id": "01a0df0c-7911-7247-bb4e-6747872b5581", "title": "Field Report: 2015-03-17 Drip Logger Service Visit", "url": "https://thecavepearlproject.org/2015/04/11/field-report-2015-03-17-drip-logger-service-visit/", "published_at": "2015-04-11T22:42:41+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f0848aeb7a0", "title": "Calibrating DS18B20 1-Wire Sensors with Ice & Steam point measurement", "url": "https://thecavepearlproject.org/2015/03/30/using-ds18b20-one-wire-sensors-to-make-a-diy-thermistor-string-pt-2-calibration/", "published_at": "2015-03-30T14:50:00+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f08499f88aa", "title": "Using multiple 1-Wire DS18B20’s for a DIY Temperature Sensor Chain", "url": "https://thecavepearlproject.org/2015/03/01/using-ds18b20-sensors-to-make-a-diy-thermistor-string-pt-1-the-build/", "published_at": "2015-03-01T22:03:57+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084a152ede", "title": "A DIY Underwater Housing for Arduino Data Loggers made from PVC pipe", "url": "https://thecavepearlproject.org/2015/02/04/a-new-diy-underwater-housing-for-2015/", "published_at": "2015-02-04T15:20:52+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084a9d0b53", "title": "A Simple DIY Underwater Connector System made from plumbing parts", "url": "https://thecavepearlproject.org/2015/01/29/a-simple-diy-underwater-connector-system/", "published_at": "2015-01-29T14:56:16+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084ad9a3cb", "title": "The 2014 Cave Pearl Project ‘Year in Review’", "url": "https://thecavepearlproject.org/2015/01/28/the-2014-cave-pearl-project-year-in-review/", "published_at": "2015-01-28T20:14:35+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084b0aeb3c", "title": "Field Report 2014-12-20: Our 2nd Drip Sensor Deployment at Rio Secreto", "url": "https://thecavepearlproject.org/2015/01/18/field-report-2014-12-20-drip-sensor-deployment-at-rio-secreto/", "published_at": "2015-01-18T23:03:13+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084ba757b1", "title": "Field Report 2014-12-18: A Water Flow Sensor Co-deployment.", "url": "https://thecavepearlproject.org/2015/01/16/field-report-2014-12-18-a-flow-sensor-co-deployment/", "published_at": "2015-01-16T06:32:29+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084c856856", "title": "Field Report 2014-12-16: Rebuilding & Reloading the Old Sensors.", "url": "https://thecavepearlproject.org/2015/01/09/field-report-2014-12-16-rebuilding-reloading-the-old-sensors/", "published_at": "2015-01-09T00:51:16+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084d3ec05b", "title": "Field Report: 2014-12-12 Retrieve the Costal Discharge Flow Sensors", "url": "https://thecavepearlproject.org/2015/01/07/field-report-2014-12-12-retrieve-the-costal-discharge-sensors/", "published_at": "2015-01-07T14:59:25+00:00" }, { "id": "01a0df20-c7f5-7017-95f3-5f084d87d014", "title": "Field Report: 2014-12-11 Our First Real-World Drip Sensor Data!", "url": "https://thecavepearlproject.org/2015/01/06/field-report-2014-12-11-our-first-real-world-drip-sensor-data/", "published_at": "2015-01-06T16:33:52+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d06344022a82", "title": "Field Report 2014-12-10: Collecting Salt Water Pearls", "url": "https://thecavepearlproject.org/2015/01/05/field-report-2014-12-10-retrieval-of-the-salt-water-pearls/", "published_at": "2015-01-05T16:49:05+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d063441eb9ea", "title": "Project Update: Gearing up for field work 2014-11-26", "url": "https://thecavepearlproject.org/2015/01/05/project-update-gearing-up-for-field-work-2014-11-26/", "published_at": "2015-01-05T16:30:19+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d0634458bc7f", "title": "Sleeping an MCP9808 on an Arduino based Pressure, Humidity & Temperature logger", "url": "https://thecavepearlproject.org/2014/12/16/sleeping-an-mcp9808-on-a-pressure-rh-temp-logger/", "published_at": "2014-12-16T00:34:18+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d063453407a8", "title": "Project Update: the Next Generation of Drip Sensors", "url": "https://thecavepearlproject.org/2014/12/01/project-update-the-next-generation-of-drip-sensors/", "published_at": "2014-12-01T19:07:52+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d0634556ce10", "title": "Cave Pearls at the 2014 Geological Society of America Conference", "url": "https://thecavepearlproject.org/2014/10/31/cave-pearls-presented-at-the-geological-society-of-america-conference/", "published_at": "2014-10-31T21:17:20+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d06345672179", "title": "The DIY Arduino datalogger with low power shut down capability (2014)", "url": "https://thecavepearlproject.org/2014/10/07/the-diy-data-logger-v2-with-low-power-shut-down-capability/", "published_at": "2014-10-07T14:48:55+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d06345803ab3", "title": "What to expect buying cheap electronic components from eBay & AliExpress", "url": "https://thecavepearlproject.org/2014/10/06/what-to-expect-when-buying-cheap-electronic-components/", "published_at": "2014-10-06T15:32:59+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d06345851abb", "title": "High SD card sleep-currents from counterfeit cards & floating pins", "url": "https://thecavepearlproject.org/2014/09/22/high-sleep-current-problem-solved/", "published_at": "2014-09-22T16:42:55+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d063464638f0", "title": "Bench Testing vs. Real world power consumption of our Arduino dataloggers", "url": "https://thecavepearlproject.org/2014/09/21/bench-testing-vs-reality/", "published_at": "2014-09-21T23:52:06+00:00" }, { "id": "01a0df39-ed1e-715a-96a8-d06346e7a624", "title": "Field Report 2014-09-02: Our first open water deployment", "url": "https://thecavepearlproject.org/2014/09/19/field-report-2014-09-02-our-first-open-water-deployment/", "published_at": "2014-09-19T16:07:21+00:00" } ] posts Claim your blog
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2026

How to Normalize Readings from Multiple Temperature Sensors (with a DIY heated water bath)original ↗
12 May 2026

2024

Sync RTC time to a GPS & Setting the DS3231 Aging Offset Register to Reduce Clock Driftoriginal ↗
23 Oct 2024
How to measure PAR (Photosynthetically Active Radiation) using a BH1750 Lux Sensororiginal ↗
10 Aug 2024
How to Normalize a Group of Pressure Sensors so they can be Deployed as a Setoriginal ↗
1 May 2024
How to calibrate NTC thermistors (A DIY method you can do at home)original ↗
20 Apr 2024

2023

The e360: A DIY Classroom Data Logger for Science [2023]original ↗
1 Dec 2023
Testing Cr2032 Coin Cell Batteries with μA to mA pulsed duty cyclesoriginal ↗
5 Jun 2023
A DIY Pressure Chamber to Test Underwater Housingsoriginal ↗
25 May 2023
“Too Ugly to Steal & Too Heavy to Carry” : Insights from a decade of rain gauge deploymentoriginal ↗
15 Apr 2023
Waterproofing your Electronics Projectoriginal ↗
17 Mar 2023

2022

2-Part ProMini Logger that runs >1 year on a Coin Cell [2022]original ↗
9 Mar 2022

2021

Timing an LED light-sensor with Pin Change Interruptsoriginal ↗
10 May 2021
Enhance your Logger with an OLED & TTP223 Capacitive Touch Switchoriginal ↗
1 Mar 2021

2020

Adding two OLED displays to your Arduino logger (without a library)original ↗
15 Nov 2020
Hacking a Capacitive Soil Moisture Sensor (v1.2) for Frequency Outputoriginal ↗
27 Oct 2020
Pro Mini Classroom Datalogger [2020 No-Solder Update]original ↗
22 Oct 2020
Using the ADS1115 16-bit differential ADC for Rapid Burst-Samplingoriginal ↗
21 May 2020
Building an ATmega 1284p based Data Loggeroriginal ↗
12 May 2020
DIY Data Logger Housing from PVC parts (2020 update)original ↗
8 Apr 2020

2019

Single Diode Temperature Sensor with Arduino ICU (& reverse-bias leakage)original ↗
4 Nov 2019
Creating a Normalized Vegetation Index Sensor with two LEDsoriginal ↗
30 Aug 2019
How to make Resistive Sensor Readings with DIGITAL I/O pinsoriginal ↗
25 Mar 2019
‘No-Parts’ Temperature Measurement with Arduino Pro Minioriginal ↗
25 Feb 2019
Easy 1-hour Pro Mini Classroom Datalogger [Feb 2019]original ↗
21 Feb 2019
Pro Mini Logger Project for the Classroom [ EDU Jan: 2019 ]original ↗
12 Jan 2019

2018

Tutorial: Adding an SPI SSD1306 OLED to an Arduino Logger (without a library)original ↗
17 Oct 2018
Starting Points & Ideas for your Arduino STEM Curriculumoriginal ↗
7 Oct 2018
Using Arduino’s Internal EEprom to Store Data & Screen Fontsoriginal ↗
24 Aug 2018
Using the Nokia 5110 LCD with an Arduino Data Loggeroriginal ↗
18 May 2018
Measuring Temperature by Comparing the Arduino System Clock to an RTCoriginal ↗
3 Feb 2018
The 2017 Cave Pearl Project ‘Year in Review’original ↗
3 Jan 2018

2017

Tutorial: Adding Sensors ( & Modules ) to Your Arduino Data Loggeroriginal ↗
17 Dec 2017
Bil A. Phillips: an Explorer, a Teacher, and a Friendoriginal ↗
28 Nov 2017
Tutorial: How to Control I²C Sensors with Arduino Codeoriginal ↗
3 Nov 2017
Measuring EC ( electrical conductivity ) with Arduinooriginal ↗
13 Aug 2017
Arduino Pro Mini Data Logger : Add Screw-Terminal Board (2017 Update)original ↗
20 Jun 2017
Cutting Power to Secure Digital Media cards for Low Current Data Loggingoriginal ↗
21 May 2017
Tutorial: Calibrating Oversampled Thermistors on an Arduino Pro Minioriginal ↗
26 Apr 2017
Give your Arduino a high resolution ADC by Oversampling with noise (from a toggled pin)original ↗
27 Feb 2017
The 2016 Cave Pearl Project ‘Year in Review’original ↗
8 Jan 2017

2016

Arduino Pro Mini Data Logger : with Dupont Jumpers (2016 Update)original ↗
27 Oct 2016
Field Report 2016-07-09: I²C pressure sensors work on 20m long cables!original ↗
22 Sept 2016
Tutorial: Using the Arduino UNO Serial Plotter for Live Data Acquisitionoriginal ↗
15 Aug 2016
Build your own Arduino Starter Kit for the Classroomoriginal ↗
8 Aug 2016
Tutorial: Better Thermistor Measurement on Arduino via Series Resistors & Areforiginal ↗
10 Jun 2016
Field Report 2016-03-28: Oldest Generation of Loggers Retiredoriginal ↗
12 May 2016
Field Report 2016-03-27: Progress on the 1-Wire DS18B20 Temperature Stringsoriginal ↗
1 May 2016
Field Report 2016-03-25: Collecting Data in Coastal Mangrovesoriginal ↗
19 Apr 2016
Field Report 2016-03-17: MCP9808 Temperature Sensor Fails Under Pressureoriginal ↗
6 Apr 2016
Field Report 2016-03-16: Rain Gauges Over Reportingoriginal ↗
5 Apr 2016
DS18B20 1-Wire calibration with Arduino: Finally nailed it!original ↗
5 Mar 2016
Improving the Accuracy of 1-Wire DS18b20 Temperature Sensor Groupsoriginal ↗
12 Feb 2016
Measuring battery discharge on an Arduino Data Loggeroriginal ↗
20 Jan 2016
Field Report 2015-12-20: Winding Down…original ↗
13 Jan 2016
Field Report 2015-12-15: New DS18B20 1-Wire Sensor Chains Installedoriginal ↗
11 Jan 2016
Field Report 2015-12-14: Re-install the Drip Monitoring Networkoriginal ↗
10 Jan 2016
Field Report 2015-12-11: Flow sensors go Farther & Deeperoriginal ↗
9 Jan 2016
Field Report 2015-12-10: Sensor Precision vs Accuracy vs Driftoriginal ↗
7 Jan 2016
Field Report 2015-12-08: The DIY Logging Rain Gauges Work!original ↗
5 Jan 2016

2015

Arduino UNO Datalogger Project for Beginners (ie: no soldering)original ↗
23 Dec 2015
Cave Pearl Data Loggers at GSA 2015original ↗
8 Nov 2015
Arduino Pro Mini Data Logger : Part 4 : Power Optimization (2015)original ↗
5 Nov 2015
Arduino Pro Mini Data Logger : Part 3: Sensors & Housing (2015)original ↗
24 Oct 2015
Arduino Pro Mini Data Logger : Part 2 : Logger Platform Assembly (2015)original ↗
24 Oct 2015
Arduino Pro Mini Data Logger : Part 1: Component Preparation (2015)original ↗
24 Oct 2015
Interview: Cave Pearl Project Team: 2015-09-20original ↗
20 Sept 2015
Modeling the Effect of Drag Enhancement on Water Flow Measurementsoriginal ↗
3 Sept 2015
Field Report 2015-08-17: Flow Sensors go back into Akumal Bayoriginal ↗
2 Sept 2015
Field Report 2015-08-14: Install New Sensors at RioSecretooriginal ↗
1 Sept 2015
Field Report 2015-08-12: Success with DS18B20 1-Wire Temperature Chains!original ↗
26 Aug 2015
Field Report 2015-08-10: Diagnosing a TMP102 Temperature Sensor Failureoriginal ↗
26 Aug 2015
Field Report 2015-08-07: Retrieve Flow Sensor from Akumal Bayoriginal ↗
24 Aug 2015
Field Report 2015-08-06: Retrieve Drip Sensors from RioSecretooriginal ↗
21 Aug 2015
Measuring Humidity with Arduino: A Masons Hyrgometer Experimentoriginal ↗
8 Jul 2015
Measuring Power Use with Complex Data Logger Duty Cyclesoriginal ↗
29 Jun 2015
Developing an Arduino weather station…original ↗
15 Jun 2015
Tutorial: How to calibrate a compass (and accelerometer) with Arduinooriginal ↗
23 May 2015
Field Report: 2015-03-23 Flow Sensor “drag fins” testedoriginal ↗
20 Apr 2015
Field Report: 2015-03-18 One logger sacrificed to the sea gods.original ↗
15 Apr 2015
Field Report: 2015-03-17 Drip Logger Service Visitoriginal ↗
11 Apr 2015
Calibrating DS18B20 1-Wire Sensors with Ice & Steam point measurementoriginal ↗
30 Mar 2015
Using multiple 1-Wire DS18B20’s for a DIY Temperature Sensor Chainoriginal ↗
1 Mar 2015
A DIY Underwater Housing for Arduino Data Loggers made from PVC pipeoriginal ↗
4 Feb 2015
A Simple DIY Underwater Connector System made from plumbing partsoriginal ↗
29 Jan 2015
The 2014 Cave Pearl Project ‘Year in Review’original ↗
28 Jan 2015
Field Report 2014-12-20: Our 2nd Drip Sensor Deployment at Rio Secretooriginal ↗
18 Jan 2015
Field Report 2014-12-18: A Water Flow Sensor Co-deployment.original ↗
16 Jan 2015
Field Report 2014-12-16: Rebuilding & Reloading the Old Sensors.original ↗
9 Jan 2015
Field Report: 2014-12-12 Retrieve the Costal Discharge Flow Sensorsoriginal ↗
7 Jan 2015
Field Report: 2014-12-11 Our First Real-World Drip Sensor Data!original ↗
6 Jan 2015
Field Report 2014-12-10: Collecting Salt Water Pearlsoriginal ↗
5 Jan 2015
Project Update: Gearing up for field work 2014-11-26original ↗
5 Jan 2015

2014

Sleeping an MCP9808 on an Arduino based Pressure, Humidity & Temperature loggeroriginal ↗
16 Dec 2014
Project Update: the Next Generation of Drip Sensorsoriginal ↗
1 Dec 2014
Cave Pearls at the 2014 Geological Society of America Conferenceoriginal ↗
31 Oct 2014
The DIY Arduino datalogger with low power shut down capability (2014)original ↗
7 Oct 2014
What to expect buying cheap electronic components from eBay & AliExpressoriginal ↗
6 Oct 2014
High SD card sleep-currents from counterfeit cards & floating pinsoriginal ↗
22 Sept 2014
Bench Testing vs. Real world power consumption of our Arduino dataloggersoriginal ↗
21 Sept 2014
Field Report 2014-09-02: Our first open water deploymentoriginal ↗
19 Sept 2014
Next