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4-bit Counter with 555, binary LEDs and 7-segment Display by rhaseven7h

5v Power Source - Center Tap Transformer, Diode Bridge Rectifier, 7805, Relay and Lamp Sample by rhaseven7h

AC 120 60Hz to DC to turn a LED on by rhaseven7h

AC 24v 60Hz to DC 5v with diode rectifier and using LM317 IC by rhaseven7h