<div dir="ltr"><div>Here is the circuit for the PSU. You guys / gals helped me iron this one out almost a year ago. This schematic is for 1 amp on the +12 and -12, but I have built a couple now with 2 amps on the +12 and it does not get too hot for the regulator. The transformer would be your standard cube shaped iron core center tap transformer (120V to 24V). Circuit is based on Electronotes.<br></div><div><br></div><div>My main concern was that I want to have 2 of these psu boards off a single transformer. I suppose I could also have a transformer for each psu board and just split the mains before the transformers too.</div><div><br></div><div>As long as I am posting the circuit, I will ask one more question. This one, much more generalized. My filter caps are only 1000 uF and the circuit seems to work perfectly fine. I see others using an outrageous number of caps in parallel with much higher values. Is this advantageous or is it pure overkill and bordering on being a problem due to not fully charging the caps?<br></div><div><br></div><div><div><img src="cid:ii_kgzu8sx40" alt="psu.png" style="margin-right: 0px;"><br></div><div></div></div></div><br><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Sun, Nov 1, 2020 at 7:16 PM Ben Stuyts <<a href="mailto:ben@stuyts.nl">ben@stuyts.nl</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><br>
> On 2 Nov 2020, at 00:49, Shawn Rakestraw <<a href="mailto:shawnrakestraw@gmail.com" target="_blank">shawnrakestraw@gmail.com</a>> wrote:<br>
> <br>
> If I use a transformer that is say 24V and 6 amps, can I connect 2 of my power supply boards to that transformer? There's nothing wrong with that, right?<br>
<br>
Hard to say without any additional info. It really depends on the topology of the power supply. For example, if you have a single wave rectifier on the input of the psu, and you have connected both psu’s in reverse, you will probably short-circuit your transformer.<br>
<br>
Ben<br>
<br>
</blockquote></div>