Help with GC power supply

[kinser]

Anyone?
Pleaseee...
I really want to finish this so that i can start on the amps..

Thanks,
Kinser

 

[boholm]

Patience, my friend. All good thing comes to he, who waits ;-)

The two capacitors are correct connected - making two electrolytics into a bipolar one.

 

[slackman]

Yep, you can replace these two elkos with a 22uF bipolar elko - the two-elko-version is much cheaper...

 

[kinser]

Hey,

Thanks you to both boholm and to slackman!
Now all I need is to find a TIP121 transistor.. are there any substitutes for the TIP121 transistor? becuase if there are i may have one at home... if there is not any then I will have to go buy... So... is there a substitute?

Thanks,
Kinser

 

[boholm]

With 12 volts only and the need to drive only a relay I would say that any npn darlington transistor (> 2W) will do. It is the relay that will determine the power needs. A TIP121 IMHO may be a bit overkill as regard to the relays I know of. They seldom use more than 50 mA. But then again I do not know what kind of relay you have or will use.