High Voltage Outputs on Mega and Due

Other Hardware Motors, Mechanics, Power and CNC
1

Hi,

I trying to add high voltage outputs to Arduino Due/Mega boards.
The idea would be to have an output with voltage between 0 and about 35 V with currents >=0.5 A.

I know the Due has embed DACs which could be useful. I'd therefore do something like this: How to modify analog output range of Arduino Due - Hackster.io to get a 0-3.3V signal I'd then like to amplify.

A non inverting amplifier would then make sense to get to higher voltages.

I have two concerns:

  • How about current?
  • How to choose a proper Op. Apm.?

Do you think this makes sense or is there an better, more "all in one" solution?

2

That sounds like the specification for a programmable power supply. What's the application? For power electronics the first decision is analog v. switched, and for that you need to know what the load is.

3

Thanks for your reply.

I'm basically trying to put together a small test bench for various applications. I'm gonna need to have an actual analog output here.

4

Then what you are looking for is probably a "voltage programmed variable output linear power supply"...

If my memory serves me this may be an application for a chip like the LM317 plus an external
pass-transistor, using a DAC to set the programming voltage, but its been ages since I did anything
with a variable voltage regulator chip.

You are only wanting to source current? Most power supply designs assume no need to sink current.

5

Hi,

Sorry for the late answer.
I figured out an alternate solution.

Thanks for your help!