Simple Hobby Circuit Projects

Steady Hand Game

Light Activated Alarm

Darkness Activated Alarm

The Blinking LED

Digital Piano

LED Flasher

Light Activated Alarm

Light Activated Relay

Light Activated Relay

Touch Lamp

Light sensor using comparator

Dark sensor using comparator

Musical Door bell

Over heat detector

Light detector with sensitivity control

Temperature controlled DC fan

Temperature Indicator

PIR activated relay