TIP122

The TIP122 is a Darlington pair NPN transistor. It functions like a normal NPN transistor, but since it has a Darlington pair inside it has a good collector current rating of about 5A and a gain of about 1000. It can also withstand about 100V across its collector- Emitter hence can be used to drive heavy loads.

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Electromagnetic Lock With Air Monitoring

“I’ve had this issue for a while where people seemingly don’t value my privacy as much as i do myself and just barge into my room whenever they feel like it without any warning. So since i had …

Automatic Infrared Water Tap at $5

“In this project, we will make an automatic on-off water tap under $5 only. We will use an IR sensor and a water switch to make this automatic infrared water tap. No microcontroller is used to make this automatic infrared …

Music Rhythm LED Flash Light

“In this project, we will make a Music Rhythm LED Flash Light circuit using Microphone and BC547 on breadboard and PCB where the led strip lights will blink with the music rhythm. The microphone will sense the music rhythm and …

SteamPunk Radio

“This project is without doubt the most complex I have undertaken, with sixteen IV-11 VFD tubes, two Arduino Mega cards, ten LED Neon light circuits, a servo, an electromagnet, two MAX6921AWI IC Chips, five DC power supplies, a HV …

5W High Power LED Driver

“The project described here is small 5W LED driver, that can be used in variety of applications by changing the mcu code. The example code provided is a simple digital toggle switch using two tactile switches. One switch is used …

RGB Thermometer Using PICO

“That was the final result of our effort today. It is a thermometer that will let you know how warm it is in your room, by using an RGB LED strip placed in an acrylic container, that is connected to …

HD Engine With Arduino

“Today, we are going to perform an assembly with the HD engine, which I consider to be an engineering masterpiece. We’re going to pick up an HD, that is, a hard drive, disassemble this device and take out the …

Responsive LED Backlight With Arduino and Python

“Working at night on the computer can be harsh on the eyes. When I worked late, the contrast between the monitor and the dark room strained my eyes. As a solution, I created this responsive monitor backlight: it aims to …

CleanSweep: the Floor Cleaning Robot!

“CleanSweep (couldn’t think of better name :P) is a smartphone controlled robot that cleans your house’s floor! The rotating mops on the front of the robot along with a foam roller (used to paint walls, not here) at …

Wifi Relay With ESP8266

“This wifi relay can controls any device like lamps or your soldering station with your smartphone or your computer.”

Raspberry PI Zero LEDStrip Controller

“The Raspberry Pi Zero has been out for quite a while now and inspiring projects with the Pi Zero pop up everywhere on maker websites. The 5 dollar Pi inspired me (Marcel Brouwers) and Chris Kuipers to start a project …