I’m building my own PSU for my DIY project. Because of I have a touchscreen display plugged to the Rpi, and an Allo Boss DAC to feed separately, I’m looking for 2x5v and at least 3A. So I bought this toroïdal https://www.audiophonics.fr/fr/transformateurs-toriques/transformateur-torique-60va-2x8v-p-10640.html
and this PSU https://www.audiophonics.fr/fr/alimentations-regulees/module-d-alimentation-lineaire-regulee-double-dc-lt1083-24v-5a-p-11793.html . The toroïdal comes from this seller and the PSU comes from an ebay dealer in china(I can make pictures of it but it seems it’s exactly the same product).
I set the trimpots to 5V and plugged the cards on each outputs of the PSU(ground is plugged to the case) but the Rpi says there is a problem: red LED blinks when Rpi is ON(in stand-by mode red LED is fix). I tested with a multimeter, and the PSU can give 7,5A at each outputs(not tested simultaneously). Same problem when display is plugged. I also tested the toroïdal: 8V at each outputs. I tried to plug cards on the 2 outputs, I tried to plug the Rpi only: the problem persists.
Can someone help me to find an issue? I don’t understand why it doesn’t work. Do I have to set to more than 5V(I’m exactly at 5,03V)? Maybe I have a dead capacitor on the PSU?.. I’m lost