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Slot car speed controller for two 1:24 cars using a PIC16F18313

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Slot car speed controller for two 1:24 cars using a PIC16F18313

This was made as a plug-in replacement upgrade for the horrible capacitor popping controller found in the Hot Wheels slot car sets from Mattel.

Hot Wheels

Features:

  • It doesn't break if you short circuit a track.
  • Actual speed control, you can now go smoothly from still to full speed, instead of "still, jump to 70%, smooth to 100%".

Two self resetting poly-fuses limit the current to 500mA per car, at 12V this should be enough for most 1:24 cars. I use 9V for the Hot Wheels circuit.

Schematic

PCB bottom

PCB top

Pinout

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Slot car speed controller for two 1:24 cars using a PIC16F18313

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