DJ Trago Posted April 27, 2009 Report Share Posted April 27, 2009 yup iv realised a silly mistake was i had put in a 7805 instead of a 7809 so iv just changed that and now iv got 12VDC out but still only 10.7VDC on the SID ICs which im sure still isnt enough. but my main consern is the lack of power on the CORE, at j2 iv got 5.2VDC but still no power on the ICs!im going to keep trying to find the problem but as usual any help is good help ;)Alex Quote Link to comment Share on other sites More sharing options...
joewhat Posted April 27, 2009 Author Report Share Posted April 27, 2009 when i first started out on that optimized psu.. i was abit naive and just soldered every thing up and hoped for the best.. this turned out not to be good so i started all over with a different mind. took small steps and confirmed them working every time..(i tested link, and voltage for every step) this turned out good for me.. dunno if this helps.. btw. did you check the voltage on the sockets before inserting the IC's as told in the: http://virtualorgan.com/virtualorgan/FileLib/Assembling_a_MIDIbox_Core.pdfthey came out good?thats my thoughts best of luck- joe Quote Link to comment Share on other sites More sharing options...
DJ Trago Posted April 27, 2009 Report Share Posted April 27, 2009 yer cheers for that, i was checking the wrong points on the CORE and it all seems good now. i still only getting 10VDC to my SIDs though and this because of the 12VDC input from the PSU :( so im just going to keep playing about with different rectifiers as i think thats where the problem lies, 9VAC input and 12VDC output dosent make much sense to me! but cheers for the heads up with that link, much loveAlex Quote Link to comment Share on other sites More sharing options...
joewhat Posted April 27, 2009 Author Report Share Posted April 27, 2009 i learned that the voltage changes when you add it to a circuit :0+).. i was just wondering where you measure your 9VAC.. i think mine measure 11-12VAC before i connect it to the optimized psu circuit.. - joe Quote Link to comment Share on other sites More sharing options...
DJ Trago Posted April 28, 2009 Report Share Posted April 28, 2009 im taking the 9VAC reading from straight out of the C64 PSU which is then rectfied to 12VDC ??? Quote Link to comment Share on other sites More sharing options...
joewhat Posted April 28, 2009 Author Report Share Posted April 28, 2009 this was the same trouble i had.. where i was advised to try another 9VAC PSU i had lying around and it made it for me(atm. i have to psu's connected ://).. i think you should measure about 11-12VAC from the 9VAC output on the PSU without anything else connected.. anyhow i found my c64 psu 9vAC output to be broken.. tt. maybe yours too broken.. :0(im no expert im very noobish.. so maybe other people got skills to help you out.. - joe Quote Link to comment Share on other sites More sharing options...
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