Optimizing Light Controlled Bot Circuit for Improved Performance

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The project involves a light-controlled bot that cycles through various movement modes using a laser pointer in a dark room. The circuit includes components like a light-dependent resistor (LDR), a BC337 transistor, a 7404 NOT gate, a 4017 decade counter, and an L293D motor driver. A key issue is that the 7404 inverter output rises at the falling edge of the light pulse, causing incorrect counting of pulses. The circuit functions correctly at a 6V motor supply but exhibits problems at 10V, particularly with noise and ambient light interference. Suggestions for improving the circuit include addressing ambient light effects and sharing schematics directly in the thread for better collaboration.
hackhard
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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
 
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hackhard said:
Im working on a project which cycles through stop,forward, back,left, right modes of a bot using light pulses as input . the circuit -
light pulse -> ldr-> transistor -> decade counter -> full adder -> l293d (10Volt)-> bot
bug - the counter clock is rising even at falling edge of light pulse ,counting 2 pulses as 4
however it works fine with motor supply =6 v
schematic-https://drive.google.com/open?id=0B5m-h82V0Ej2Z0tBb1ZqTE42aHc
any thoughts

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
 
davenn said:
how are you going to the problem of ambient light affecting the receive side in the bot ?
light source is laser pointer , room is dark
the circuit is not mounted on the bot
 
hackhard said:
light source is laser pointer , room is dark
the circuit is not mounted on the bot

OK good :)

and as I asked ... PLEASE post the schematic(s) in this thread
 
davenn said:
and as I asked ... PLEASE post the schematic(s) in this thread

Capture.png
 
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