Dual Power Supply 15V

Posted on Nov 26, 2012

The 7915 (at least the `made in Morocco` I used) needs a small load (some mA) to work correctly. If you get funny voltages (-18.4V or so), put a resistor from the 7915 output to ground (2k2 works good). Or it might be a good idea to put the `power on` LED with a 1k5 resistor to the negative rail (take care of polarity!).

Dual Power Supply 15V
Click here to download the full size of the above Circuit.

Some brands of electrolytics have a small inductance which will cause the regulator ICs to oscillate. Use tantalum caps for C5/C6 to be sure (but also most normal electrolytics will work).

Leave Comment

characters left:

New Circuits



Popular Circuits

Sleep Mode Circuit Circuit
am transmitter circuits
how to make remote control circuit from
12 led vu meter circuit
comp probe circuit
R/C-Plane altitude recorder
Simple Easy Parametric and Graphic EQs Plus Peaks and Notches
The Finder
VCR Robot
Transistor Based Burglar Alarm - Adding Extra Zones
Optional Flip inverter circuit
One fan Natural wind simulator circuit