Constructionk88
Member
Isnt a typical wall adapter is roughly in the 1 to 3 amp out range and an average car batter in the 500 to 800 amp range? Shouldn't that make a big difference?
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Isnt a typical wall adapter is roughly in the 1 to 3 amp out range and an average car batter in the 500 to 800 amp range? Shouldn't that make a big difference?
Thanks for the clarification Nigel. Yes im new to this. This isnt for homework. Its an off hobby im trying to improve on. I appreciate the help. For most of my purposes thos is to build power supply and power regulating circuits. I dont have a broad need and going through a multitude of prebuild purchased power supplies is insanity given the short lifespans of the previous ones.
having reverse powered a transformer i had on hand(surprisingly), the new outputs are 25, 35, 41, and 47. the 25v out rectified is 19v(each is 6v- the ac prior to rectifiying). it powers the fan much more powerfully than the higher voltages??
Nigel, that was a spammer.What??? - have you not read the thread?.
Nigel, that was a spammer.
You must have been replying as I was deleting.
His text was copied from AAC.
JimB
The original inputs are common, 110v,220v,240,and 277v. They are my new outputs sonce im running the transformer in reverse. I realized the higher voltage outs have s much lower amperage than the lower vout. If i recall it was 20vdc@2.5a, 31vdc@1.2, 37vdc@.9a and 47vdc@.7a. My diodes seem to be lowering the rectified voltage. They are large power transistors. The type i dont recall but when i switched to common 1n4005 the rectified output voltage was indeed 1.414x ac in. I believe the original primary windings are the cause of the drastic change in amperage?
No sir it does work. Great. On my lowest voltage. 19vdc @2amps. The higher voltage outputs have very little amperage and i discovered the blower is designed to draw 7amps. Im working on getting 3a or 5a at 12 to 20vdc but im thinking ill have to rewire the secondary. I was just wondering if it was possible to do so without rewiring
Well that is excellent news, I think that I can say that we are all very happy for you.Ive gotten it to work as desired sir.
We look forward to hearing how that works out for you.just researching how to use an lm317 to control amperage
you can do it, but it's an extreme safety hazard to do so.thanks for the reply. So to some extent im guessings its not really possible to even produce a usable dc directly from a 110v main?