ULN2803

ULN2803 is a High voltage, high current Transistor Array IC used especially with Microcontrollers where we need to drive high power loads. Thic IC consists of a eight NPN Darlington connected transistors with common Clamp diodes for switching the loads connected to the output. This IC is widely used to drive high loads such Lamps, relays, motors etc. It is usually rated at 50v/500mA. This article brings out the working of ULN2803 IC and how to use it in a circuit.

Main Content

8 Channel Infra-Red Remote-Control Arduino Shield Using ULN2803

“This is an 8 channel infra-red remote-control Arduino shield that can drive 8 high current loads such as LEDs, solenoids, multiple toy DC Motors, dual unipolar stepper motor, filament lamps, etc. Each channel consists of two parallel NPN transistors with …

Inchworm Robot - Modular, Move Allsides With BT App

“All the robots are the inspiration of some natural things. In worms, Inchworm has some special features its walk quickly and its so cute. The dream about making inchworm robot is start when i am 15 years old in my …

MIDI Solenoid Drum Kit

“Build a MIDI drum kit using solenoids and CircuitPython! 3D print parts to create a solenoid driven mallet to trigger snare drums, cymbals and much more! Use the Adafruit Feather M4 and ULN2803A darlington driver to create your own custom …

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 …

How to Make a Water Level Meter With Uln2803

“In this tutorial we will see how to make a water level meter circuit with the integrated uln2803.The printed circuit is included, the operation of the same will be explained, as well as we will see the characteristics.It …

RC Submarine

“How to make a radio-controlled submarine with a video camera Everyone can build a submarine. To assemble this design from a tool, only a screwdriver and a hot glue gun were required. The design consists of several modules: module with …

PCB FOR INTERACTIVE MODULE 8x8

“I have previously done a project about “INTERACTIVE RGB LED TABLE” with A2 size, 16x16 RGB LED matrix on foam sheets. I gifted it to my friend. Today, I will share how to implement this project by designing an INTERACTIVE …

Laserbeam-Figures

“This instruction will show you a simple construction to use a controlled laser beam for projecting nice figures on a wall. What does the system do ? On the shaft of each motor a small mirror is installed. I did it …

Led Matrix Touch Control

“This time Ill share how to integrate touch control into the bi-colors led matrix 16x32. It can be used to control indoor devices via led panel or carry out some interactive effects by touch action. It may sound strange but …

RGB LED Cube

“In this instructable, we made a battery powered RGB LED cube. It automatically shifts through colours with the help of a built in microcontroler. The bottom half of the cube is laser cut and the top half is 3D printed …