Hi Guys,
I have a potentially simple problem here. I need a simple amplifier or attenuator circuit that can have its gain or attenuation changed by the output of a microprocessor. So I have a sinusoidal wave coming through at any amplitude.. probably about 1V and I would like this to be amplified to around 5V or attenuated to 0.2V (and i can amplify later on) by setting an output pin on the microprocessor on or off.
I have had a couple of ideas and tried them.. all including a transistor but none have really panned out, so I thought I would ask for some inspiration
Thanks,
Bryan.
I have a potentially simple problem here. I need a simple amplifier or attenuator circuit that can have its gain or attenuation changed by the output of a microprocessor. So I have a sinusoidal wave coming through at any amplitude.. probably about 1V and I would like this to be amplified to around 5V or attenuated to 0.2V (and i can amplify later on) by setting an output pin on the microprocessor on or off.
I have had a couple of ideas and tried them.. all including a transistor but none have really panned out, so I thought I would ask for some inspiration
Thanks,
Bryan.