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Sunnyday

Please help with my project...

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I have a ac/dc transformer {wallwart} that converts 110ac to 30vdc. It is outputting 500mA {.5 A} and I need to keep the voltage the same as it is { 30V d/c} but get the current down to around 1mA-20mA . Is there a simple way that I could solder a resistor/potentiometer/diode/etc inline of the positive or negative side of the output cord to accomplish this? If so could you please tell me exactly what is needed and the simpliest way to achieve it. Thanks

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The unit you connect to it will only draw the current it needs as long as the voltage is right it will be ok. Just make sure you connect the + of the wallwart to the + of your unit.

Terry

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Generally speaking, to lower current, the voltage must be reduced. The common way to limit current, in a low current app like yours, is to insert series resistance (which drops voltage). BTW, what is your application?

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