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  • Users: DumbKid
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  1. DumbKid

    555 Timer Trouble

    Hi, I recently tried to interface a 555 timer to a 4-bit up/down binary counter. I used a java calculator with circuit to design a frequency output of 2Hz(60% duty cycle). I etched the board and soldered all components. The counter wasn't functioning. I hooked up my scope to pin 3 and ground...
  2. DumbKid

    Help with Belt drive for robotics...

    Hi, I need two 2

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