flightline
New Member
Dear Sirs:
I am replacing a 5K rotary linear pot with a digital pot (DS1804) and controller (basic stamp). I will from my computer then be able to control a pot which in turn controls an amplifier's output.
My first problem is I do not understand the difference between negative voltage and ground. The 5K pot is connected to +8v, -8v and the wiper to an input on an amplifier according to schematics. But the digital pot is looking for +6V, a ground (not negative voltage) and input. I must also somehow lower the voltage from 8V to 6V so as not to burn the digital pot and figure out how to ground it. Does anyone have the patients to help me on this one? Thank you very much.
I am replacing a 5K rotary linear pot with a digital pot (DS1804) and controller (basic stamp). I will from my computer then be able to control a pot which in turn controls an amplifier's output.
My first problem is I do not understand the difference between negative voltage and ground. The 5K pot is connected to +8v, -8v and the wiper to an input on an amplifier according to schematics. But the digital pot is looking for +6V, a ground (not negative voltage) and input. I must also somehow lower the voltage from 8V to 6V so as not to burn the digital pot and figure out how to ground it. Does anyone have the patients to help me on this one? Thank you very much.