Need schematic for 9v DC PSU

[penance]

HI

I need a psu to power a 9V DC motor, this is the motor supplied by Scheu with thier TT. It has a small PLL circuit already in the motor case, so i think i just need a good stable 9V supply.
This is also an exercise for me so i dont mind going a bit OTT.

cheers
Andy

 

[JOE DIRT®]

a 9 volt battery would be the best way to get it going.....and a simple LM7809 regulator from national would be easy to build

www.national.com

 

[markp]

HI

I need a psu to power a 9V DC motor, this is the motor supplied by Scheu with thier TT. It has a small PLL circuit already in the motor case, so i think i just need a good stable 9V supply.
This is also an exercise for me so i dont mind going a bit OTT.

cheers
Andy

Use a large 12volt lead acid battery as your voltage source before the regulator. Charge it up once every month or so and you will be set with a noiseless voltage source that is easy to regulate with a simple LM7809 or better. Put a large cap after the regulator.

 

[penance]

cheers

I hadnt considered batteries

 

[maylar]

I imagine that the "wall wart" battery elimunators at Radio Shack might do the trick too.

 

[markp]

I imagine that the "wall wart" battery elimunators at Radio Shack might do the trick too.

Nope, the idea is the constant smooth voltage delivered by a battery. The eliminator would total destroy the purpose of the whole idea.