Other
“This is not a battery charging circuit, just a basic circuit for brief interruptions in mains power. This circuit monitors the battery level and will indicate if the batteries are good with a green LED, and when they should be …
“Sensitive Pulse Induction metal detector which is based on ARM STM32 microcontroller. It can detect metal coih at distance of 30cm, and big metal object at distance of more than 80 cm. Supplies: - STM32F103C8 microcontroller board - WS2812 Addressable LED Strip …
“Digitally controlled 5.1 channel audio preamplifier system to increase the gain of the multi-channel PC sound cards. This project introduces a digitally controlled 5.1 channel audio preamplifier system. This amplifier is specifically designed to increase the gain of …
“What!?? Another Atari Punk Console build? Wait wait wait people, this one is different, promise. Waaay back in 1982, Forrest Mims, Radio Shack booklet writer and Young Earth Creationist (roll eyes emoji) published the plans to his Stepped Tone Generator …
“This project is just for fun. One of the worst bits about the pandemic – apart from all the illness and death of course – is that with everyone stuck at home, all the advantages of living within cycling distance of central …
“Analog synthesizers are very cool, but also quite difficult to make. So I wanted to make one as simple as it can get, so its functioning can be easily understandable. For it to work, you need a few basic sub-circuits …
“Tone control is a type of equalization used to make specific pitches or “frequencies” in an audio signal softer or louder. Bass, treble and volume control It allows a listener to adjust the tone of the sound produced by an …
“Tired of the same old Boss-like dual-diode-clamp distortion pedals? Want a pedal that offers truckloads of enraged guitar brutality, downright to the border of the obscene, yet is also capable of a mellow bluesy overdrive? Want a stompbox that lets …
“The volume of blood in our fingers changes at different parts of the cardiac cycle (heartbeat). Immediately following ventricular contraction (when the heart pumps blood out of the ventricles and to the rest of the body), the volume of blood …
“Ever wanted to have a light show that reacts to what you play through you’re favorite electric instrument? This instructable will show you how! This one is based on an Arduino Uno microcontroller, an Adafruit 16x32 RGB LED matrix …
“Thoracic Impedance is a measure of the electrical activity in the chest that varies with changes in body size and composition, fluid volume, ventilation status, and heart characteristics such as cardiac output and stroke volume. Our goal was to measure …
“This Instructable documents how to create a simple heart rate monitor using Photoplethysmography with an IR phototransistor via transmissive absorption using the Arduino to process the pulsatile data and display live results via a TFT screen. To use the source …