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jeroenj_1989
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Posts posted by jeroenj_1989
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If you look in the parts list in the first post at page 1 you can see 3 types of transistors suggestet, and that the resistors should be in the area of 0,33 ohm, two transistors for 3W and three transistors for 5W
http://www.electronics-lab.com/forum/index.php?topic=19066.msg87803#msg87803
This is probably a very stupid question (maybe not :-) )
but why do I need 3 Transistors for a 5 amp supply?
I checked the datasheet for the MJ11015, and it states it can handle 200W.
From my calculations, I get : 30V * 5 Amps = 150 W...
I should say one transistor is enough... -
If you look at Tesseract -
I built the original version about two years ago ( with the Voltmeter + Ammeter LCD panel ) and it works wery good, but now i need some more power and i decided to built the new version with the 5 A output ( it is possible to become 7A with more powertransistors ? I have a 30V~ / 10 A trafo ). I used EAGLE ( i don't make publicity for EAGLE !! ) to make a single PCB layer with only 3 wire on top of PCB. The C1 ( 2x10.000
0-30V Stabilized Power Supply
in Projects Q/A
Posted
Quoting on my one entry, pfffff
Anyway, it's probably because of the heat development in the transistor.
It's possible to use only one transistor, however a big (active) cooler is necessary.
It think I will go with 3 transistors, I will get back to you with the results.