Stripboard Layout Of Dummy Alarm Project

Dummy Alarm Project – Simple Electronics Projects

A 555 astable circuit makes the LED flash briefly once every 5 seconds to imitate the indicator light of a real alarm. The circuit is designed to use very little current to prolong battery life so that it can be left on permanently. An on/off switch is not included, but could be added if you wish. Circuit diagram Of […]

Stripboard Layout Of Simple Electronic Lock Project

Electronic Lock Project – Simple Electronics Projects

Electronic Lock Project has six or more push switches. To ‘unlock’ must press all the correct ones at the same time but not press any of the cancel switches. Pressing just one cancel switch will avoid the circuit unlocking. When the circuit unlocks it actually just turns on an LED for about one second, but […]

Stripboard Layout Of Timer Project

Timer Project 1-10 Minute – Simple Electronics Projects

Timing circuit starts timing when switched on. The green LED lights in the circuit show that timing is in progress. When the time period is over the green LED turns off and the red LED turns on and the bleeper sounds. The time period is set by adjusting the variable resistor. It can be adjusted […]