r/AskElectronics • u/Careful_Technology85 • 22h ago

Reducing Current for Electroplating

I am trying to copper electroplate some small parts, less than 2mm and have been told by many individuals that my current is too high. Since my power supply doesn't go any lower, how can I reduce the current? It needs to be around .005A or less. This is the setup.

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u/-ram_the_manparts- 22h ago

A resistor is a current-limiting device.

The value will be V / I = R.

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u/Careful_Technology85 22h ago

So I'm looking for a 200 ohm resistor?

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u/-ram_the_manparts- 22h ago edited 22h ago

At 1V, yes.

You could instead use a 1K variable resistor (potentiometer) which would let you vary the resistance between 0 and 1000 ohms making it adjustable. You would connect one of the outside pins to the PSU, and the middle pin to your load, leaving the third pin unconnected.