Search Results for "button"

NEW V3 version with RTC and buzzer (require V3+ ECG Logger Viewer application) The ECG Logger project is a Wearable Cardio Monitor for Long-Term (up to 24h) ECG Data Acquisition and Analysis (aka Holter) with an ECG live (real-time) mode. This project provides a very low-cost open-source "Hardware and Software" for a Cardiac Rhythmic Holter. The hardware has been made very simple and is based on an Arduino Nano micro-controller with boards for SD card mass-storage, instrumentation...

If two or more people are responsible for something, either both do it, or none. Less often it only gets done once. This is an AVR ATTiny84 project that has features like putting the microcontroller to sleep to save battery. One button is to change from AM or PM, and the other is to turn on one of the LEDs representing the current choice for 5 seconds. The unit then goes to sleep, and the LEDs are off. It is powered by an 18650 and I put it all in a medicine bottle. A description of it's construction, as simple as it is, is at an instructable here: https://www.instructables.com/id/Did-We-Feed-the-Pets/ Current draw: Awake: 5 mA Sleeping: 0.13 uA (!)

...It does control the preparation of the recovery system, has automatic launch detection, an apogee detection system, parachute deployment, and safety timers. All this is managed with the most simple one button and one LED user interface.