Other
“Last month I spent quite a lot of time on expansion modules for use with the ESP-12E I2C Base Card. While the system worked exceptionally well as a prototyping and firmware testing platform ( as originally intended ), I immediately saw …
“The USB Power Injector allows a convenient way to power up USB 2.0 devices from a lab power supply, while still allowing data transfer. When powering devices from a standard USB 2.0 port, either from a PC or …
“The project presented here is a sensitive sound sensor. The circuit converts sound frequency and outputs DC voltage. The board consists of LM358 OPAMP and LM2907 IC. LM358 is used as a dual-stage microphone preamplifier and LM2907 acts as a …
“A rechargeable battery’s load should be disconnected at the point of complete discharge, to avoid a further (deep) discharge that can shorten its life or destroy it. Because a battery’s terminal voltage recovers when you disconnect the load …
“Hello, I am pleased to present to you my first major project, a custom designed 7 channel transceiver unit. The transmitter is based on an arduino nano, to which two joysticks are connected, a potmeter and two toggle switches. Communication …
“The basics of measuring the current. Making a own current sensor to measure the current using voltmeter. Components required: 1) Arduino Nano 2) LM358 3) 10mV/A shunt resistor 4) 9-volt battery 5) 100k, 10k, 1k resistor. 6) I2C LCD …
“A few months ago I started developing my own bio-impedance measurement system and I planned to use a flexible printed circuit board as a sensor. Since I haven’t used this type of board before, I started looking for a …
“So here’s something a bit Nerdy, A Pokémon-themed Pocket Weather Station made by using custom PCBs and 3D Printed parts. An ESP8266 Board is being used to drive the display and it was made to look like a Pokedex …
“Build your own Li-Po & Li-ion Balance Charger for under $10 Recently I purchased some 3S Li-Po batteries for a project I was working on. Unlike single cell batteries, batteries with multiple cells should be charged in a balanced way. This …
“We’ve come full circle. Here’s a timer made up of timers… This project was undertaken as a potential submission for the 555-contest hosted by Hackaday in 2021. At its core this widget operates as a cooking timer, implemented …