Elektor Formant Modular

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
>