Is this ok? I am unsure of how to connect the rectifiers to my transformer. To get 15VAC, I have to tie pins 5 and 7 together and 6&8 together. The schematic shows three outputs to the rectifiers, but I only have 2 - do I just connect each of the 15V outputs to the ~ terminals of the rectifiers?
not an answer, but can you find the LFO-ic’s? I wanted to build them half a year ago and i couldn’t find them (wasn’t looking for long though )
As for the question; if the transformer is like the ones i used you need to connect the 2 output pins in the middle together (pin 6 and 7 i guess). By connecting the middle ones they become the “ground pin” (sorry for the unprofessional terms guys) ; the transformer will keep the voltage between either of the outside output pins (pin 5 or pin 8 ) and the middle 15Volts.
So now you have the 3 outputs to the rectifiers.
BUT BEFORE YOU START WITH MY ADVICE ASK/WAIT FOR A SECOND OPINION, I’VE BEEN WRONG BEFORE (high voltages etc.)
You generate +/-15VAC, by connecting secondary windings in series (the ends will give that 30VAC) and “central tap” (those pins connected together) is a reference ground, or 0V.
bye, Moebius
p.s. I found ICL3038 from a trashed CT (roentgen) machine laying in the backjard of a hospital. Man, You should have seen “the quality” of the “scan motor control” PCB - I hope it wasn’t tested on living subjects as backside of the board had 'bout dozen jumperwires in it.
did you land up finishing your LFO box? I am interested in building one myself, but theres not much information and it looks a little daunting for a beginner! I have built a midibox seqencer, but that had lots of info and a parts list etc as well as an interface laid out already.. Any tips would be appreciated!
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