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  1. badai

    IC problem

    I have serial cable consist of 4 ports(on pcb).........one of them cannot work(physical problem). My expectation is because of the IC on that port. So, how i can know this is because of IC problem? Is it enough to test it using multimeter and compare with other IC from different port??? Any idea
  2. badai

    design PCB using EAGLE

    as you ask MP, i move to this forum. It looks like the author missed R17 on his schematic, from pin 12 to ground like R23 on the other side.(AUDIOGURU said).....can you show me clearly, where it should be placed? ERROR: Sheet 1/1: no SUPPLY for implicit POWER Pin IC1P V+ ERROR: Sheet 1/1: no...
  3. badai

    current limiter and stepper motor ramp generator

    hello guys. i am doing stepper motor control for position and velocity( ramp generator) .i am using 8051 as the microcontroller. anyone know how to construct ramp generator for stepper motor? how is the connection then? does it an external circuit to the motor or it has to be connected to...
  4. badai

    200MHz FM transmitter

    i'm thinking of designing an FM transmitter and receiver that have the carrier frequency around 200MHz using no IC but i could not find the circuit schematic. help needed ???
  5. badai

    4 bit binary counter

    hello.......anyone can send 2 me logic diagram for 4 bit binary counter, using NAND gate not AND gate...pls..... ;D
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