This is the circuit diagram of drinking water alarm based a small water sensor by using aluminium foil and plastic…
This is a low cost, simple, yet a surprisingly powerful electronic siren powered by just a 9V battery. The circuit…
This is the diagram of heat detector circuit which already integrated with siren circuit in the output. This circuit applies…
Here the circuit diagram of safer security system alarm. There are many security systems use a closed loop of wires…
The following circuit is a simple fire alarm circuit based NE555 timer and use thermistor as a temperature detector. This…
Here is the circuit diagram of simple multitone alarm. This is a low cost circuit which is simple and easy…
This is door knob touch alarm for your home security purpose. The alarm will be activated when someone touch the…