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 It was originally made in the TO-18 metal can as shown in the picture.

DIY PC controlled high power PEMF Therapy Device

“This is a PEMF signal amplifier and not a complete PEMF device, but therefore it can be connected to various sources of such a signal. PEMF or Pulsed Electromagnetic Field therapy is a type of therapy that uses electromagnetic fields …

Sip N’ Sprout: Automated Plant Device

“This device fully automates necessary processes for house plants including light and water regulation. I’ve personally always enjoyed having plants so when I came to college, I thought it would be nice to grow some in my room. After …

Ultrasonic Garage Parking Sensor LED Stop Light

“I recently added a wood rack to my garage, which unfortunately reduced the car parking depth. I now have to pull up to a few inches of the rack to allow adequate space behind the car to access the rest …

Arduino-Based Handheld Simon Game

“Simon is a short-term memory game. The beautiful simplicity of the game makes it an entertaining pastime for all ages, as well as a commonly referenced example project in the fields of programming, electrical engineering, and product design. This project …

Ic 555-Based Pcb Snowflake

“Winter is here, and the most interesting thing in winter is Christmas. As a PCB designer, I decided to build something useful for Christmas and so I made a blinking PCB snowflake for Christmas tree decoration. we can use this …

Pulse Width Modulation and LEDs

“How to use PWM with LEDs - from the basics to advanced intensity and color management This project is basically a tutorial on managing the brightness of an LED and the color of an RGB LED using PWM or pulse width …

DIY Simple sensitive EMF Detector and Electroscope

“Inexpensive and functional instruments for the physics laboratory This time I will show you how to make two simple but very sensitive EMF (Electromagnetic Field ) Detectors. Electromagnetic fields are a combination of invisible electric and magnetic fields of force. They …

Making an old Air Purifier smart

“adding the Phillips AC4014 to a Home Assistant network The Phillips AC4014 is certainly not the newest model of an air purifier, but I have some of them and they still work perfectly fine. Filters are readily available, so I …

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 …