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Light controlled bot

  1. Dec 3, 2016 #1
    Im working on a project which cycles through stop,forward, back,left, right modes of a bot using light pulses as input .
    light source is laser pointer , room is dark
    the circuit is not mounted on the bot
    the circuit -
    light pulse -> ldr-> bc337transistor ->7404 NOT -> 4017 decade counter ->7483 full adder -> l293d (10Volt)-> bot
    bug - the 7404 inverter out is rising even at falling edge of light pulse
    however it works fine with motor supply =6 v and also when dc motor is not connected to l293d
    is the circuit correct?
    schematic-https://drive.google.com/open?id=0B5m-h82V0Ej2N2kzVWE1UDR0WDg
    any thoughts how to reduce noise in the circuit
     
    Last edited: Dec 3, 2016
  2. jcsd
  3. Dec 3, 2016 #2

    davenn

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    post schematics in the thread
    DONT force people to sign up to www sites just to see an image or 2

    how are you going to the problem of ambient light affecting the receive side in the bot ?

    that is going to be your first major problem
     
  4. Dec 3, 2016 #3
    light source is laser pointer , room is dark
    the circuit is not mounted on the bot
     
  5. Dec 4, 2016 #4

    davenn

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    Gold Member

    OK good :)

    and as I asked ... PLEASE post the schematic(s) in this thread
     
  6. Dec 4, 2016 #5
    Capture.png
     
    Last edited: Dec 4, 2016
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