Episode 713 Back to basics: Power Supply Voltage regulation and pass transistor, heat sink considerations Product: www.banggood.com/EQKIT-Consta... Manual: www.icstation.com/product_docu... Be a Patron: / imsaiguy
Hint for “young players”: toss a 2nd pass element configured as a follower between the rectifier and the storage capacitor. Since AC isn’t on all the time, you get up to 35% power dissipation reduction for almost no effort, and the “final”’regulator stage can operate with very low dropout voltage.
Great explanation sir . Iam also building a power supply ( 30V ,1 A ) I have a transformer with 0 ,15 and 30 V taps .now the problem is when I change the taps with relay, say 15 V tap to 30 V tap the the filter cap (3500uf) creates sparks at relay . I have searched a lot about snubber for this configuration but nothing works . Can you please help ? With a video or a schematic to learn this tap changing technique.
Here is a schematic of a supply with relay switching. elektrotanya.com/mastech_hy-1803d_single-output-dc-power-supply_sch.pdf/download.html you could try a surge protector: www.mouser.com/ProductDetail/Littelfuse/ST1R020B/?qs=gGwQ3tp6HcQeByB84iAXFw%3D%3D or resistor. I would guess a spark is normal and the relay must be good enough to handle this.
@@IMSAIGuy Yes, I watched it. Great video by the way! On part 2 you say that the OPAMPs are supplied at -5V/+30V. This means that the output of this circuit will always be smaller than 30V. Even if the OPAMPs are rail to rail you are losing at least 1 volt from the Darlington pair. Am I missing something?
