Building a cheap power supply with 3d printing

It took quite a time to tackle this project again. Since we have a lot of free time now, can’t go anywhere (Corona), I decided to finish this project for good.

I needed a power supply that shows me how much juice I am pulling not to overstress the switcher. Since I want to use it to power my future stations all at once, e.g. HF rig and VHF rig. So for that reason I took a Voltmeter with Ampmeter combo. The problem is, you can’t measure high currents without a shunt.

Since I am not really an expert in electronics, it was a bit repelling for me to start building such a project. But actually it is not difficult at all. You just have to follow the schematics. In the end it worked.

I don’t really know what else to write down for this, that ain’t rocket science. So I am going to attach all the parts needed for this.

I want to share another issue with you. During testing the Ampmeter (you’ll have to calibrate it probably), I realized that keying up the radio with a VHF or UHF antenna it starts to falsify the readings on the Amp meter. So for calibrating the Amp meter use another consumer (I used a LED bar to measure and calibrate the Amps).

You can download the STL files for 3d printing here:

https://www.thingiverse.com/thing:4256801