List Of More Complex Electronic Demo Circuits

These circuits are mostly a combination of more than 2 basic circuit fragments. Click the button to see the page with a schematic diagram, video, and description of the circuit.

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5 volt 1 watt LED relay module night light circuit using LDR 555 inverter

5V 1W night light circuit using LM393 comparator PNP BJT and LDR

Capacitor Voltage Doubler minus Diode Drops using DC Power

5 LED Knight Rider Chaser Circuit Using 4017 Decade Counter And 555 Timer

6 LED Knight Rider Chaser Circuit Using 4017 Decade Counter And 555 Timer

Fading an LED on and off circuit using 2 Op Amps

Fading alternate LEDs circuit using 555 timer and op amp voltage follower

Pull up resistor helps NE555 timer output turn off PNP BJT circuit

Basic low backup power demo circuit

Low power backup supply demo circuit using diode OR gate

Servo position set with a 555 timer circuit

Servo controlled with LDR and 555 timer circuit

Accumulated light level switch circuit using photodiode and 555 timer

4053 CD4053 Triple 2 Channel Multiplexer or Demultiplexer

Op amp light level indicator with 2V and 4V reference voltages using two red LEDs

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