Circuit: Diagram For Security Lighting

This is an excellent security device, sees infra red heat of intruder in field of view. This is a recent design for a PIR detector; should not be underestimated. Rather than the usual opamps-amps and amplifiers, this kit uses a movement IC. Has PC board m

PCB plans and circuit diagram (schematic) for what appears to be an extremely nice 100 watt guitar amplifier. Includes preamplifier and power amplifier circuit diagram and PCBs

This circuit is an alarm for the home, car and a lot more. It employs a magnet and reed switch to trigger the circuit. An intergral piezo sounder produces the alarm sound (100dB). There is also a relay capable fo handling up to 10 amps that will switch wh

Metal detectors a tons of fun. These metal detector electronic circuits will enable you to go hunting for all kinds of cool stuff, wherever you like!

This really is an excellent introduction to security devices. Set your own four digit code; any wrong key-in sequence resets the lock; correct sequence activates the relay (up to 240VAC contacts). A 9-digit key pad circuit board is separate and connects v

Shows the pins and wiring instructions for creating an RS-232 Null Modem for your PC.