HOW TO MAKE LED SIGN BOARD

HOW TO MAKE LED SIGN BOARD Hi friends in this video i have made led sign board controller using 555 timer ic 74hc595 ic relays and a few components the circuit runs on 12v and can be used with led sign boards i hope you will enjoy this video please like share and subscribe my channel Components: 1x 74HC595 IC 1x 555 TIMER IC 1x 7805 REGULATOR IC 1x BD139 TRANSISTOR 7x BC547 TRANSISTORS 4x 1N4007 DIODES 4x LEDs 1x 10K VARIABLE RESISTOR 9x 1K RESISTORS 5x 10K RESISTORS 2x 100nF ( 104 )CAPACITORS 1x 10uF CAPACITOR 1x 47uF CAPACITOR 1x 100uF CAPACITOR VERO BOARD JUMPER WIRES Circuit Diagram: https://drive.google.com/open?id=1hdG... https://drive.google.com/open?id=1jxU... Previous videos:    • how to make mini cnc plotter      • Let's Answer Your Questions      • LET'S REPAIR IT | BENQ PROJECTOR