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  1. bogdan2

    connecting an IR port to my mainboard

    my mainboard has a IR/CIR connector on it, so i want to connect an emitter receiver to it. the pinout on the connector is: for IR: VCC5 key IR-RX GND IRTX VCC and for the CIR: VCC5 stand by x CIR-RX GND x x i assume that x means not connected. if anybody can help, i need to make an IR...
  2. bogdan2

    produce electricity using quartz cristals...

    when a quartz cristal is swueezed it produces some electricity. has anyone thought to use this for charging something? or maybe use this electricity to power something? these kind of things are used in lighters and other stuff. has anyone actually built this???
  3. bogdan2

    simple PWM

    i found this simple PWM for motor control. it is something usefull, and i was thinking to build it and wanted to know what others think. maybe some of you know a similar circuit, i mean, simple, but maybe more performant? here is the circuit: http://www.geocities.com/tjacodesign/motor/motor.html
  4. bogdan2

    led driver

    anyone cand suggest a led driver chip? one that requires few external components? it should be able to drive 1-2 white leds from a suply voltage like 2-5V....any ideas?
  5. bogdan2

    cunonstant current load

    i need to build a constant current load, to demonstrate that if a constant current passes trough a capacitor, then the voltage across it increases or decreases liniary. the problem is that i don't know how to build this. the caps will be charged to max 16V, and if i can get a constat load over...
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