Content for 2N2222

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 It was originally made in the TO-18 metal can as shown in the picture.

STM32 Soldering and Rework Station with TFT Display

“Soldering station supported Hakko T12 tips and rework Hot Air Gun 858D using color TFT ili9341 display. This is a third release of combined soldering iron controller for Hakko T12 tips and 858D rework station based on STM32 micro controller …

Infrared TV Remote Using ESP32(with Android App)

“The remote control from my TV was worn out and beginning to malfunction. As it was an older model, a new remote could not be purchased. So, instead, I decided to make my own TV remote to replace it. In …

How to Build 8x8x8 LED Cube

“An 8x8x8 LED cube is a visual treat with 3D effects and patterns. It works on the concept of Persistence of Vision, a feature of the human eye which tricks our brain in to thinking that an object is present …

A Simple Clock

“In this coronavirus lockdown, I came back to my hometown. Everything is perfectly fine here but there was one small problem. There is no clock on my table. I know a table clock sounds a little redundant especially in this …

Analog Video Transmitter

“In this tutorial I will try to make the simplest analog video transmitter and send that signal over the radio frequencies and make our homemade “spy camera”. The circuit is easy to make and requires just a few components. I …

It’s About Time!

“In this age of WiFi and the Internet of Things, clocks should set themselves and be super accurate. Perhaps you’ve built an Arduino alarm clock in the past - you’ll be pleasantly surprised to see how easy it is …

LEDs Ring Oscillator

“This is a simple ring oscillator. Each of the three transistor circuit work as an inverter and the oscillation is made possible with a feedback loop. Supplies: Parts: general purpose bipolar junction (BJT) NPN or PNP transistors - 5 (you might …

CSS555 EEPROM Programmer: Celebrate 50 years of 555 IC’s!

“Create amazingly long delays using this super low power 555 timer This year the world famous 555 timer IC celebrates its 50th anniversary! A lot of things have happened with IC’s since then but the 555 timer IC still …

88888: the Electronic Smile Counter

“This project originated from a request of a friend. He asked me to build a so-called smile counter for their college dorm - a segmented display which can show a number. This number must increment every time someone pushed a button …

Easy Joule Thief Circuit

“A joule thief takes a low DC voltage and boosts it up to a higher voltage. You can even take a battery that other devices will consider to be drained and get a bit more of the energy out of …