now i agree with both of you.. today it finally work out for me.. !! and very many thank you for your answers to my questions.:!! this is an awesome project.. and i learn alot .! thanks again.. \o/? waiiyy..
Glad to be of help! For a change, it’s nice to be able to offer assistance instead of just asking for it!
:0) im glad.: ! i hope to help some one my self one day . .!
hi there im also having some PSU issues, so i thought id tag on to the end of this.
basically iv built a stereo SID set-up with the optimised PSU but im not getting the right voltages at all. i think i all stems from the PSU as im not getting the 14VDC output, im instead getting 12.2VDC. the components i have used are the exact recommendation (7805, 2200uf25v, 2200uf16v ect…) but iv used a DC W005M rectifier as i was told this was fine.
my SID boards are set up for the old 6581s and im running a 4 x 20 backlit display, the voltages for my ICs are too low though my SIDs are getting a low 7.5VDC and the other IC on the SID board are showing 5.2VDC and on the CORE my PIC appears to be getting nothing and neither does the other small IC.
i have acquired 2 C64 PSUs (one black no vents and one grey no vents) and they appear to be inputting the correct voltages
any ideas would be very helpful!
cheers, Alex
i have acquired 2 C64 PSUs (one black no vents and one grey no vents) and they appear to be inputting the correct voltages
I went round and round and round with the optimized PSU and it turned out my C64 PSU’s were to blame. At first, I thought I was getting the right voltages out of my PSU, but apparently not. I didn’t discover this until I bought a panel-mount DIN female plug, plugged in my C64 PSU(s) and then tested the voltages, touching my meter probes to the back part of the DIN female plug, rather than the male plug of the C64 PSU. Only then did I get accurate readings.
Just a thought based on my experience. If this isn’t the problem, you might have a short somewhere on the Optimized PSU build.
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
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.pdf
they came out good?
thats my thoughts
best of luck
- joe
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 love
Alex
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
im taking the 9VAC reading from straight out of the C64 PSU which is then rectfied to 12VDC ???
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