Car anti theft wireless alarm

This FM radio-controlled anti- theft alarm can be used with any vehicle having 6- to 12-volt DC supply system. The mini VHF, FM transmitter is fitted in the vehicle at night when it is parked in the car porch or car park. The receiver unit with CXA1019,...

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Ultrasonic Pest Repeller

We also agree, pest is not invited guess. So it is the Pest repeller Schematic.IC CMOS 4047 Operate as low oscillator which the frequency can adjust bettwen 5 khz until 30 khz with trimpot P1.each output Q and Q' feed to inverter Driver 4050 IC2 and...

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AT90LS8515 PBX / VIRTUAL PBX

in this project, we demonstrate the 4 line telephone PBX systems with full signaling and switching functions similar to those of the central office systems PBX. It's Not Virtual PBX .Dial tone, busy tone, and ring tone are provided during call progress....

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H-Bridge Motor Driver

H-Bridge Motor DriverA wiring diagram, photograph, and movie of an H-bridge dc motor driver circuit implemented with a TC4424A, TC4427A, or MAX4427 dual MOSFET driver IC. Very useful for running small bot gear motors. Sweet! The Line-Following Robot...

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RS-232C multiplexer serves as multiport adapter

Multiport RS-232C PC add-on boards are intended for intensive multichannel communication. Therefore, each serial port has its own transmission controller. If your application doesn't need interrupt-driven service, and polling the devices through RS-232C...

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