Elektor Formant Modular

You could also adjust your pcb a bit and add a 7805 voltageregulator to get +5V from the +15 V.
Check the 7805 datasheet for the exact schematic.
regards,

K.

--- On Tue, 27/4/10, PostRock <postrockost@...> wrote:

From: PostRock <postrockost@...>
Subject: [ElektorFormant] Re: powering a VCO
To: ElektorFormant@yahoogroups.com
Date: Tuesday, 27 April, 2010, 13:16







 



  


    
      
      
      terry - thanks for the reply. . i havent been here in a while either.  funny how life gets in the way.. 



im wondering if the psu + distributor i have will even allow me to power these oscillators now - as its not wired for +5v..  



or is there an easy schematic for converting a +15v to +5 that anyone could help me out with?



thanks



--- In ElektorFormant@ yahoogroups. com, Terry Garrett <terry.garrett76@ ...> wrote:

>

> Sorry for the delay only just looked on the forum as busy in the summer/autumn due to lots of things, so Format put on hold for ??? months. 

>             Re the power supplies, you definitely need TWO supplies one for the CCO (current controlled osc) and one for the outout stages. This helps to a certain extent with bleed but more importantly the accuracy of the CCO. The VCO must be considered as 2 circuits treated  separately with +5 +15 -15 and ground for CCO and +15 -15 and ground for Output stages. I think this is mentioned in the original notes.

>                regards

>                                    Terry

> 

> 

> 

> 

> ____________ _________ _________ __

> From: zombie_tron <zombie_tron@ ...>

> To: ElektorFormant@ yahoogroups. com

> Sent: Tuesday, July 21, 2009 3:59:04 PM

> Subject: [ElektorFormant] powering a VCO

> 

>   

> greetings - - 

> 

> im having trouble getting the old VCO to make any sound.

> 

> i noticed that there are 2 sets of power supply inputs on the back of the boards. on some of the modules i have these two have been linked together with cables on the boards them selves. is this kosher, or does it really need a doubled up supply.

> 

> also the +5v had been soldered to the +15v bus board. 

> 

> is there a better way to do this? other things to try?

> 

> dont feel bad about suggesting any obvious things i might be missing. . theres a good chance thats the case!! im learning!

> 

> thanks,

> brendan

>