Electrical: Circuit With Light

The Traffic Lights circuit performs actions just like those of a real traffic light system, switching between red, amber & green.

Introduces the Optocoupler-triac MOC3010. Complete electrical isolation between input audio signal (low voltage circuit) and output light modulation. Operates from 100 VAC line. Audio input via 3.5mm jack.

This circuit will play a tune when light strikes a light dependent resistor, such as when a music box lid is opened.

The most popular use for this kit is to make you own night-light. It can also be used to switch just about any appliance on or off in light or darkness. Light sensitivity is adjustable over quite a range. The relay can handle up to 10 Amps at 110VAC. Oper

Three relay-based electronic switching circuits that switch according to light levels.

Versatile light organ based on PIC microcontroller.

No electrical connection to the telephone is required, attach a suction cup to the hand set an turn on the amplifier. This project permits group listening to phone calls. You can also use it to monitor any other oscillating electrical field. Dual IC's pro

A sensitive photo Darlington transistor is used with a CMOS nand gate. The circuit detects light and triggers a siren. You could add your own triac or relay and switch practically anything. The kit uses the MEL12 Darlington super alpha phototransistor, ty

A stronger, Mecha-Medusa is a walking robot that operates with the aid of a sound sensor. Clap hands or snap fingers to command this robot to start walking on four legs. Stops automatically after a preset time. Ideal for the hobbyist or budding scientist.

Circuits that operate just like the real gameshows, where a light shows up for the first contestant to hit their answer button.

This super cool circuit behaves as a clapper-switch. You clap and the circuit turns on. Clap and it turns off. Great as a light clap switch.