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Prototype 3D puzzle for toddler

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scorpio19

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PLEASE HELP!!
Urgent!
I got problem with my circuit. Can anybody help me troubleshoot?

Description of project:
- 9 slots for 9 cubes
- 9 cubes for the puzzle
- Sensors used:
- Potentiometer.
- Infrared.

The 2 sensors that we used is for 2 separate prototype but using the same circuit. As for the Infrared, we need to use, most probably a micro-controller or whatnot.
Please help me troubleshoot this urgent problem.
Thanks. Appreaciate any help.
Sorry for any inconvenience caused.
 

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