Need schematic for 9v DC PSU

penance · 27th January 2004, 02:39 PM

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® · 27th January 2004, 02:57 PM

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 · 27th January 2004, 04:03 PM

Quote:

Originally posted by 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

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 · 27th January 2004, 04:16 PM

cheers

I hadnt considered batteries

maylar · 27th January 2004, 04:25 PM

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

markp · 27th January 2004, 07:12 PM

Quote:

Originally posted by maylar
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.

27th January 2004, 02:39 PM	#1
penance diyAudio Member Join Date: Oct 2003 Location: Bristol	Need schematic for 9v DC PSU 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

27th January 2004, 04:25 PM	#5
maylar diyAudio Member Join Date: Jun 2003 Location: Connecticut	I imagine that the "wall wart" battery elimunators at Radio Shack might do the trick too. __________________ dave

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27th January 2004, 02:57 PM	#2
JOE DIRT® diyAudio Member Join Date: Apr 2003 Location: Brantford, ON	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

27th January 2004, 04:16 PM	#4
penance diyAudio Member Join Date: Oct 2003 Location: Bristol	cheers I hadnt considered batteries