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(Im)patiently waiting for PCBs to arrive...

A project log for Bench Power Supply

Designing an open source, modular bench power supply to rule them all.

the-big-oneThe Big One 04/24/2015 at 17:404 Comments

One month is a long time when you are waiting for boards to arrive!

As mentioned earlier, my PCBs are ordered and have been shipped a couple weeks ago. I estimate they will arrive in early May. Free shipping from China is slow, and I am too cheap to pay for faster shipping. :-(

The boards are shown again here... the board with the heat sinks will be used multiple times (once per channel, so I will be using 4 myself), while the other sections will be used only once (unless I can figure out some alternate use for them).

Furthermore, I am somewhat confident that the PSU channel board can also be used as a dummy load if you skip populating the regulator + headsink, and just short out the IN and OUT lines on the regulator chip. This needs to be verified still, though.

In the mean time I have been planning the enclosure. The faceplate will be brushed aluminum, and will look something like this:

The entire enclosure will be made of wood (with aluminum front and back plates), with an overall look similar to my resource monitor:


Discussions

The Big One wrote 04/04/2016 at 15:00 point

The channel output config consists of 4 analog values.  The SET values are supplied by the DACs on the controller, and the GET values are generated from the channel hardware and pass the actual values back to ADCs on the controller.  See the schematic at https: //cdn.hackaday.io/images/9978061434596733221.png for more details.

Cheers

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theEngineer wrote 04/04/2016 at 09:30 point

Hi, i'm wondering how the switches are wired up. Are they just between V-out and the plug or are they wired an other way?

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The Big One wrote 04/04/2016 at 14:27 point

Are you talking about the encoder switches?

These are done in the normal fashion with a pullup on the SW pin, and the switch completing the circuit to ground.

Cheers

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theEngineer wrote 04/04/2016 at 14:50 point

I ment the channel switches enabling the channel output (that is at least the function they are I guess).

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