The Memsic 2125 (datasheet) is a two-axis accelerometer capable of measuring acceleration up to plus or minus 2g. It has a simple digital interface: two pins (one for each axis) emit pulses whose duration corresponds to the acceleration of that axis. By measuring the length of that pulse, in microseconds, using the Arduino’s pulseIn() function, […]
Memsic 2125 Accelerometer using Arduino Read More »
This instructables show how to use MAX30102, XIAO and a tiny display to build a blood oxygen and heart rate meter. Step 1: Sensor & Algorithm This project use Maxim Integrated MAX30102 Biosensor to detect pulse oximeter and heart rate. However, the official sample is not so accurate, so will use the MolecularD algorithm instead. Ref.: https://www.instructables.com/Pulse-Oximeter-With-…
Blood Oxygen Heart Rate Meter Read More »
After a break of around two decades I’ve recently started building a model railway. One of the issues I’ve faced is trying to work out how fast I should be running the trains so that their speed reflects reality given the scale at which they are modelled. I’m guessing the details won’t interest everyone reading
An Arduino Powered (Scale) Speed Trap Read More »
Spirometers are the classical instrument to perform the parsing of air as it is blown out of your mouth. They consist of a tube that you blow into that records the volume and speed of one breath which are then compared to a set of normal values based on height, wt and sex and are
3D Printed Spirometer Read More »
Recently I was reviewing one of my oldest project, and decided to “refresh” previous design by taking full advantage of the new arduino Leonardo board. Based on AtMega32U4, which include PGA (programmable gain amplifier), oscilloscope’s analog front end doesn’t require external OPA this time, end could be build in 1-2 hours on prototype board, using
Quasi real-time oscilloscope using Arduino Read More »
Have you ever wondered how migratory birds manage to have such an amazing sense of direction despite being so generally clueless? They can sense the Earth’s magnetic field with what is basically a compass built into their body. Wouldn’t it be cool to feel what that’s like? The following instructions are loosely based off of
How to Make a Tactile Feedback Compass Belt Read More »
Have you ever wanted to, without going out of your way to clock your processor, see how much stress your computer is under? With this project you will have a simple bar graph that constantly shows how much stress your computer is under. If the graph reads 0, your computer isn’t working too much. If
Visual Computer Stress Meter using an Arduino Read More »
Simple project to check the air quality in your house. Since we stay/work from home a lot lately, it might be a good idea to monitor the quality of the air and remind yourself when it’s time to open the window and get some fresh air in. Step 1: Parts and Tools Parts BME680 CJMCU
Indoor Air Quality Meter Read More »
Harsh new rules at work getting you down? Overtime sucking the life out of you? Or maybe things are great, either way now you can show your co-workers and management exactly how you feel about your job without a single meeting, memo, or team bonding exercise. This is the Quality of Life Meter. Boss take
Quality of Life Meter Read More »
This sketch is used by Exercise: Read Analog Accelerometer. Full Source Code The full code is all in one file ReadAccelerometer.ino. // ReadAccelerometer – read a 3-axis analog accelerometer and display the results to the serial port // // Copyright (c) 2016, Garth Zeglin. All rights reserved. Licensed under the // terms of the BSD 3-clause license
Arduino Sketch Read Accelerometer Read More »
