Category: VC-1
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VC-1: Volume control for guitar using Arduino
As explained here, here and here, the VC-1 is a volume control for guitar (or bass) that can use a potentiometer, a variable analog signal or a Midi command to change the output volume.
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VC-1: New circuit
The first circuit design for the VC-1 was a bit unstable and very dependant on the quality of the control signal. Since the goal here is to control the resistance with a PWM signal from the micro-controller, the control signal is going to be a fixed frequency square wave with a variable duty cycle (variable…
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VC-1: Volume Control Beta
The VC-1 is. On the left, the Silonex Audiohm opto-couplers (OC) with the electronic drivers. it has been described here. On the right, the line-buffer/impedance-controller described there. It works as expected, using two digital pins on the Arduino micro-controller to change the volume. Partial specifications I use 2.2 Mohm metal film resitors as a voltage…
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VC-1: More impedance control
In the previous post, I described the circuit that I’m using to emulate a potentiometer using a couple of opto-isolator (or opto-couplers?). There is one small problem with the circuit: the input impedance has to be quite low. If you just plug a guitar in the circuit, which generally has a high impedance output, it…
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VC-1: Digital/Midi Volume Control
A user asked if I could design an FCB1010/PU-2 volume control. I love challenges… It took me weeks to get one working properly. The are two main parts to this: the analog side and the digital side. The analog side A potentiometer will generally be connected between ground and signal as: In this case, the…