egres

AG, thats ok, i thought something with fonts will be wrong :) well.. i am sure you know that those bulbs must be cooled.. atkeast with air.. when i wired it in series, and connected 24 volts for few seconds, it did not blew up, but my table is a little brown in that place :D .. and the bulb started smoking :D .. but i did not wanted to sacrifice it for my experiments :D

and a video, thats all, thanks for your attention :) egres pc050163.rar

two more:

hi everybody.. here are some photos of mine power supply.. no housing yet, but few "tests" list of changes: (partlist by audioguru, the tuned one, but few parts changed) power transistors: -a pair of BD249C (100V, 25A, 40A_peak, 125W at 25

and by the way... looking at yours wattage : 32*3=96W and mine: (34-14)*2=40W is mine wrong? is the heat going to a heatsink determined by U*I ? or (U(source)-U(load))*I? egres

well, the transistor was hot when i managed to connect 12V bulb on it.. i set 14V on supply, and the current was 2A.. so (BIG 500VA transformer with 4 primary wires.. output can be 24,27 or 30 Volts.. set on 27Volts) -> after diodes it is cca 34Volts.. 34-14=20 -> "unused" voltage 20*2=40 watts on heatsink.. heatsink is not black, and it is from pentium 4, 1ghz CPU, so it is not the best for this app.. i am going to do a two-stage fan controller tomorrow.. (off-20%-100%), using 1n4148 diode on a heatsink, and tl082.. would you be interested in it? should i post a circuit diagram here? egres

well... i have just finished mine.. if i wasnt a bit stupid, it could work on a first attempt ::) i have bought two BD241C as Q1 and Q2 and two 7805 stabilizators for voltmeter and ampermeter... i dont know how, but i soldered 7805 in a place of Q1, and i spent 4 hours checking everything ::) i replaced it and it works fine.. i must buy a 0,33ohm resistors, because i forgot to buy them yesterday.. with one TIP3055 the heatsink gets quite hot.. so thank you, ;) egres

one more question.. ive got twenty high-quality potentiometers, but they are 100K.. how can i modify the power supply to use them? thx, egres

excellent, exactly what i wanted to know.. thank you, audioguru i will find your part list in the forum, i dont want to misuse yourself ;) and by the way... i was looking at the 5A version in the forum.. the changes are not that big i expected, but i think i will start with 3A.. thanks again

hi guys, i am new here, (but i have been watching your forums for a couple of weeks) and i found that power supply very interesting.. i have got a big transformer from broken UPS, output is 24volts (hehe, 400-500VA :P, so maybe it is a good idea to build hmm.. lets say.. 10A supply in the future ) so i decided to make your power supply.. but there are nearly 80 pages about it, soooo, im a bit lazy to read that all to extract some useful info can you tell me, what are the major difficulties of the construction? ( shown here, it is the default version ) maybe changed types of power transistor, and op-amps.. (im sorry, i know that it has been already mentioned in the forums, but it is not providing an easy survey (whoo, what a lexicon-type expression) ) .. i hope you got my point.. sorry for my bad english, if it is so flagrant thx everybody