#transistor-circuit
transistor-circuit circuits ready to build, each with a parts list, a schematic and a picture showing how to connect it. Want to change something? Make your own copy in one click.
Newest circuits
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Automatic Night Light
A simple night light that turns on an LED automatically when it gets dark. No microcontroller needed: just a photoresistor, a transistor and two resistors on…
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Candle-Flicker LED Strip
This project uses a flickering LED (one of those that you only need to connect to power and it will flicker light a flame). By using a resistor and an…
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Mini Monster Box
This is my mini monster box: Knock on the box, and a grumpy little monster pops out to see who's there. A microphone hears the knock, a one-transistor…
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Simple Water Sensor
This project is a a very simple water-leak detector. Place two exposed wires on the floor near your washing machine or some other place where you want to…
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Automatic Night Lamp
This is an automatic night lamp. The lamp turns on automatically at night. Tweak the value of R2 (or replace with a potentiometer) to adjust the amount of…
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Automatic Garden Lights
A circuit that turns on your garden lights at night. This circuit is connected between the power source of my garden lights and the lights. When the night…
