I have the idea (that you will already tell me a sinister viable) to make a power supply with a dichroic transformer (or two), of which they weigh, not the switching source electronics. The idea is to rectify and filter, to attack a step down circuit of those Chinese (I leave link below) and thus be able to regulate the output. And in that filtering is where the doubt sdurge me: What condenser / s to put and the need or not tmb of an R ???? I find the necessary calculations, but always according to a constant load. And this would take a V and I variables. That is to say different charges at different voltages according to the occasion. How can I calculate the most appropriate value for the CR filter? It would take a 10A bridge, to go over the 4A that those Transfor take out. And enter the circuit with those 12v (or 24) cc and filtered. https://www.ebay.es/i/152334226905?chn=ps&norover=1&mkevt=1&mkrid=1185-146825-5486-0&mkcid=2&itemid=152334226905&targetid=491779963415&device=t&mktype=pla&goappampad=16&r=====# 491779963415 & abcId = 1139526 & merchantid = 116395509 & gclid = EAIaIQobChMI5ZbBs_Xx5QIVVIjVCh2W-gtEEAQYAiABEgJU5fD_BwE