Content for 2N2222

Build a Raspberry Pi powersupply with Digispark Attiny85

“Raspberry Pi is an amazing device, packing so much power into a small form factor with such a cheap cost. Unfortunately, it does not comes with its own power supply. Shutting down involves running the shutdown command and unplugging the …

LED Writing Board for Kids

“Children like to play and usually don’t like to study. But, it is very easy to teach them by some interesting stuffs. ‘Learning by playing’ is the best way to teach them. From the thinking I made a LED …

Arduino Transistor Motor Driver

“Now here is the a H-Bridge motor driver that is made of transistors and can be controlled by an arduino,it is capable of changing the direction of the motor but not the speed…..”

DIY automatic solar charge controller

“Today I am back with another project called DIY AUTOMATIC SOLAR CHARGE CONTROLLER. It’s an automatic switching circuit that used to control the charging of a battery from solar panels or any other source. It’s a 555 based …

PulseSim - Photoplethysmograph (Heartbeat) Analog Simulator

“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 …

uWaiPi - Time Driven Automatic Plant Watering System

“Hi there! Did you forget to water your plants today morning? Are you planning for a vacation but thinking who’s going to water the plants? Well, if your answers are Yes, then I have a solution for your problem …

Servo control with microchip microcontroller

“In this instructable I want to show you how to control a servo using a microcontroller (18F2550) and how to avoid using an unknown library to control a servo.”

3 x 3 x 3 led cube with arduino

“Welcome to my led cube .it’s easy, only thing to do is to learn code. Even I built my cube by referring to some of the instructables website.”

3D Printed Motion Replicator & Recorder Robot Arm for Hot Summer Days

“I always wanted to build a 3 DOF arm that can be controlled with its copy. With the Arduino & 3D printing it was pretty easy. I hope you can easily built this robot by following these 8 steps. Please don …

Accurate wireless weather vane

“This wireless weather vane has some unique features- wind direction with a simple, economical, and accurate absolute encoder. Some consumer weather stations Comparison have a limited wind direction resolution of 22.5 degrees, updated every 14 seconds. This weather station …