From where I sit i can see no problem at all. :-D >true - good idea. i actually found an old +5V 1.2A supply lying around the house. . im thinking i could set up a distributor to send the +5v to a few modules... see any problem with that? > >--- In ElektorFormant@yahoogroups.com, Gerard Bik <gbik@...> wrote: >> >> It shouldn't be hard or expensive to get a 5V power supply at some computer dump. Every day digital stuff with working power supplies is thrown away. >> >> gerards regards >> >> >> >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 >> >> >> > >> > >> > >> > >> >------------------------------------ >> > >> >Yahoo! Groups Links >> > >> > >> > >> >> -- >> ______________________ _ >> Gerard Bik grafische vormgeving >> Van Aerssenstraat 263 >> 2582 JM Den Haag >> 070 3554081 >> >> Website: http://www.biknewz.nl >> IEDP gecertificeerd >> > > > > >------------------------------------ > >Yahoo! Groups Links > > > -- ______________________ _ Gerard Bik grafische vormgeving Van Aerssenstraat 263 2582 JM Den Haag 070 3554081 Website: http://www.biknewz.nl IEDP gecertificeerd
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[ElektorFormant] Re: powering a VCO
2010-04-27 by Gerard Bik