2N2222

The 2N2222 is a common NPN bipolar junction transistor used for general purpose low-power amplifying or switching applications. It is designed for low to medium current, low power, medium voltage, and can operate at moderately high speeds. It was originally made in the TO-18 metal can as shown in the picture.

Main Content

Digital Level With Cross-Line Laser

“Hi everyone, today I’m going to show you how to make a digital level with optional integrated cross-line laser. About a year ago I created a digital multi-tool. While that tool does feature a lot of different modes, for …

UV-C Sterilizer

“During this pandemic, it has become extremely important to make sure that we take all the necessary steps to keep this coronavirus away from us. Since the vaccines are still under development, the only way to stop the virus is …

Transistor Microphone Amplifier

“This article shows you how to make a transistor microphone amplifier. The minimum power supply for this circuit is 1.5 V. However, you will need at least 3 V if you are making an optional LED detector (transistor Q3 …

Digital Multi-Tool

“Hi everyone. If you’re like me you, probably have a bunch of spare sensors lying around either from incomplete projects, or that you bought on a whim for some reason or another. I was inspired by Patrick Panikulam’s …

Infrared Transmitter

“This article shows you how to make an infra red analogue transmitter. This is an old circuit. Nowadays laser diodes are used to transmit digital signals via optic fibres. This circuit can be used to to transmit audio signal via …

8x24x8 RED GREEN BLUE LED CUBE

“I have previously done an 8x16x8 Led Cube Clock controlled by Arduino Mega 2560 and Real Time Clock Module DS3231 more than 2 years ago and until now it still works fine. I also conducted the tests using ESP-01 …

Led Matrix With Arduino

“This Is A Led Matrix Which Uses 74HC595 Shift Register & CD4017 Decade Counter , Its Very Simpe To Make This Project If You Follow My Steps Given Below I Have Simplified The Steps And Explained Everything For Better Understanding . Done With …

Project  Rumbler

Rumbler

“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 …

SSR Latching Circuit With Push Buttons

“Im planning to add some power tools to the underside of my workbench so I can make a table router for example. The tools will mount from the underside on some sort of a removable plate so they can be …

5x5x5 RGB Color Cube

“An easy to construct RGB cube with a fantastic light show in software. This is one of a series of instructions on building LED cubes with the MEGA. The overall purpose is to build cubes without a lot of external …