Content for ULN2803

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.

MyVFD - A 9-Digit VFD Info Station

“ESP32 controlled VFD screen. This device supports date/time, weather, random number generator, etc. Last year, I got an old Sharp EL-8109 calculator. Which uses a 9-digit Futaba 9-ST-08A VFD display. The calculator still works, but the …

Driving VFD tubes with an Arduino Nano

“A simple method for incorporating vacuum fluorescent display tubes into your projects! I’ve had a handful of Soviet-made IV-6 (ИВ-6) tubes sitting around my workshop for years, but I never really tried to get them working for any …

Bluetooth Matrix

“The project is a sample project about how matrix monitors works. The scroll speed can be set by a potentiometer. A Bluetooth module added to the project. So, you can send texts to your board with a smart phone. A …

Blynk - creating a local server with a Raspberry Pi

“Blynk, is it the savour of microprocessors everywhere? Well at first look this seems to show promise, so let’s take it for a spin and see. While looking for a unique way to control a two-stage green-house, I came …

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 …