greeting everyone,I have positive regulator I.C LM 7812 need to boost output current around 2 ampere.How to add transistor to get that current.I don't want to use 317 series,can anyone please give me simple circuit to wirring will very appreciate ( I use this I.C regulator to heat 12AX7 filament it work fine and sound good enough for my ears but I need more current).Thanks foward.
Thanks Juergen,I din't try yet now I'm home a lot of snow around Seattle,Washington USA.I can't go anywhere soon,but I have NPN transistor in hand I just want to try to add transistor to boost current first.so what about 78S12?
This works well. I have built it.
I have used BD139 for Q1.
Full information here
http://www.extremecircuits.net/2009/08/ampere-or-current-booster-circuit.html
http://www.extremecircuits.net/p/complete-list-of-electronics-projects.html
An externally hosted image should be here but it was not working when we last tested it.
I have used BD139 for Q1.
Full information here
http://www.extremecircuits.net/2009/08/ampere-or-current-booster-circuit.html
http://www.extremecircuits.net/p/complete-list-of-electronics-projects.html
Last edited:
Hi Puffin,awesome my man this what I really need.Can you give me the value of R1,R2 please.Many thanks.This works well. I have built it.
An externally hosted image should be here but it was not working when we last tested it.
I have used BD139 for Q1.
Thank you very much Puffin I got it.It work now.Very appreciate and you have a good evening guy.Hi Puffin,awesome my man this what I really need.Can you give me the value of R1,R2 please.Many thanks.
If you need 2A you could use an extra transistor like this :-
An externally hosted image should be here but it was not working when we last tested it.
thanong -
Can you give us a bit more information? Specifically,
What is this being used in?
What is your voltage supply? (What transformer, rectification, etc...)
What is the load? You mention filaments, what kind of tubes? How many?
You say you want to 'boost the current' Can you elaborate?
Can you give us a bit more information? Specifically,
What is this being used in?
What is your voltage supply? (What transformer, rectification, etc...)
What is the load? You mention filaments, what kind of tubes? How many?
You say you want to 'boost the current' Can you elaborate?
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