8 Channel Infra-Red Remote-Control Arduino Shield Using ULN2803
https://www.electronics-lab.com/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 freewheel diodes which are important to drive inductive loads like motors. The shield consists of […]
72 Channels Serial To Parallel Driver Board Using 74HC595 & ULN2803
https://www.electronics-lab.com/72-channels-serial-parallel-driver-board-using-74hc595-uln2803/
72 channels Serial (SPI) to parallel driver board has been designed for various applications. This project can be used as multi Solenoid driver, large size 7 segment display driver, bar graph driver, and LED driver. The project works with 5V logic levels. Output load supply 12V-48V DC and each output can drive 500mA load. I […]
Open Badge: The LED Badge
https://www.electronics-lab.com/open-badge-the-led-badge/
Rohit Gupta published a new build, the OpenBadge The major elements on the PCB were: – LED Matrix – A MSP430G2553 microcontroller brain – A ULN2803 Darlington Driver to sink the current – A USB connector to charge the battery – A SBW connector to program the MSP430 – A Switch to change the message […]