Thanks Florian,

So just to make sense of the ASCII drawing;

the positive supply goes to the 7809 with a cap either side between the positive and gnd and the 7809 grounded on one pin

Are the caps anything special i.e. tantalums

Many thanks again

David

David Salter
Senior Consultant
PSG

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________________________________

From: Doepfer_a100@yahoogroups.com [mailto: Doepfer_a100@yahoogroups.com ] On Behalf Of Florian Anwander
Sent: 10 March 2008 10:35
To: Doepfer_a100@yahoogroups.com
Subject: Re: 1 9V adapter



Hi David

two possibilities:
1.) an adaptor to the powerbus of the A-100

+12V--+-7809--+---o +9v
in | | | out
=== | === <-------capacitors are 100n
| | |
gnd---+---+---+---o

2.) or you pick the dc direct from the rectifier at the powersupply:

~+15V--+---+---7809--+--------o +9v
in | | | | out
=== ===c2 | c3===
C1--- | | |
| | | |
gnd---+---+----+----+--------o

All the best, Florian

David Salter wrote:

> Florian, or anybody really but I know Florian has done this,
>
> I want to build a Roland tuner pedal into my modular - I intend to re
> case it, and I want to power if off the modular's PSU rather than keep
> taking the panel out and changing batteries.
>
> Is there a schematic for a little adapter like Doepfer's 5V adapter that
> will convert +12 to +9 volts
>
> Many thanks
>
> David
>
> David Salter
> Senior Consultant
> PSG
>
> Reuters Messaging: david.salter.reuters.com@... <mailto:david.salter.reuters.com%40reuters.net>
> (t) +44 (0)20 7542 2402 | (m) 07990562402 | (f) 52699
>
> Get the latest news at Reuters.com < http://www.reuters.com/ < http://www.reuters.com/ > >
>
>
>
>
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--
Florian Anwander |ConSol
Tel. +49(89)45841-133 |Consulting&Solutions Software GmbH
Fax +49(89)45841-111 |Franziskanerstr. 38, D-81669 München
email: florian.anwander@... <mailto:florian.anwander%40consol.de> | http://www.consol.de < http://www.consol.de >





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Any views expressed in this message are those of the individual sender,
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Reuters Limited is part of the Reuters Group of companies, of which Reuters Group PLC is the ultimate parent company.
Reuters Group PLC - Registered office address: The Reuters Building, South Colonnade, Canary Wharf, London E14 5EP, United Kingdom
Registered No: 3296375
Registered in England and Wales



[Non-text portions of this message have been removed]