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    Fast step signal generator.

    Hello.... Long time ago I build TDR. It has 47AC14 as pulse generator, but now I want to improve it. AC14 is just little to slow and has excsive ringing. I do search a lot and found that SRD is way to go. (Avalanche generator is other direction as I want step and not pulse) HC14 has no ringing...
  2. E

    IRDA printer simulator.

    Hello... I'm have some instrumet that have IrDa output for printer. In old laptop I have IrDa receiver attached to serial port and I wrote HDLC routines to comunicate with instrument. Now the old laptop died and I can't print any more. The USB IrDa interface doesn't have serial port and seems...

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