Hello masters!,
I'm trying to replace a traditional (knob) 10k pot with a 10k digital pot. Finally I've got several 10k digital pots but the problem is that as datasheet says: wiper voltaje accepts only +/-5V while the application is in +/-20V (measured with my tester).

So the question is: How can I trick the circuit so I can wipe +/-20V with the +/-5V (in wiper line) digital potentiometer i've got. I guess some basic resistor circuit trick or something.

Extra data1: It's for an ultra cheap 2000W 220V AC SCR dimmer.
Extra data2: Digital pots I have is a X9C103P.
Extra data3: My english is crap, sorry for mistakes.
Regards, Rod.

 

No schematic? Not knowing what your circuit is, perhaps you could use the digi-pot to control the LED current in an opto-isolator, and use the opto's output transistor to trigger the SCR.