Increasing DC voltage

#1

Hi There
does anyone know of a way stepping up the DC voltage to around 10 volts from an impulse trigger from the Axoloti board.

#2

First things first: you should check whether you can't just trigger whatever you're trying to trigger with either the audio or analogue out directly.

If it doesn't work you'll have to use external opamps. Do some research on opamp circuits as you'll have to make it yourself on stripboard, and you'll have to power it externally as the axo power supply won't put out 10v. If it's for modular you can also use some kind of instrument input or envelope follower if you don't want to make the circuit yourself.

I plan on making a multiple pin connector from the axo into a custom module on the modular (maybe using one of those computer screen cables or something, not sure about that yet) then regulating the voltage up as well as back down to allow the Axo ton interact with the modular. The advantage of doing it this way is that I can power the module directly from the modular power supply.

#3

Hi
Sorry for slow reply i have limited internet access at the moment.
I'm liking your idea for op-amp use for control voltages :smile:
Would you happen to know what type of OP-AMP circuit i would need to take over a potentiometer operation with a control voltage.

Cheers.

#4

The op amp doesn't take over the potentiometer, it attenuated and offsets the modular signal from +-5V (or whatever) to 0-3V.

If you're interested in learning about synth diy have a look at the Make: Analog Synthesizers by Ray Wilson. There are also loads of online resources: start searching op amp amplifier circuits and take it from there. Not sure what the best current resource is tone honest, but there are plenty!