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Auto: Door Circuit Diagram

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
Photo: Auto Roll 4 Channel RF Remote Control Auto Roll 4 Channel RF Remote Control
4 Channel RF Remote Control Relay Board with Auto Roll
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!
Photo: IR Beam Sensor IR Beam Sensor
This kit uses an infrared beam to monitor door & passage-ways or any other area.
Photo: Auto Roll 10 Channel UHF Remote Control Auto Roll 10 Channel UHF Remote Control
4 Channel RF Remote Control Relay Board with Auto Roll
Photo: Auto Roll 2 Channel RF Remote Control Auto Roll 2 Channel RF Remote Control
4 Channel RF Remote Control Relay Board with Auto Roll
Shows the pins and wiring instructions for creating an RS-232 Null Modem for your PC.