neazoi
Advanced Member level 6
Hello, I would like to make an oscillator using the LTC1799 and I was wondering if a means exist to replace the conventional potentiometer/resistor for frequency setting, using a digital one or a PC-controlled.
What I need is a PC/micro controlled resistor, but the resolution should be high, so I can step throughout all frequencies.
An Idea I had, was to use an LDR and a LED pointed towards it. Depended on the voltage at the led, it's brightness should change, so that the LDR value is changing.
Any other ideas for a voltage controlled or digitally controlled resistor?
What I need is a PC/micro controlled resistor, but the resolution should be high, so I can step throughout all frequencies.
An Idea I had, was to use an LDR and a LED pointed towards it. Depended on the voltage at the led, it's brightness should change, so that the LDR value is changing.
Any other ideas for a voltage controlled or digitally controlled resistor?