Hiya,
I am using an amiga/c64 psu (square plug) and have connected the 5v to J2 of the core and removed the voltage regulator and then bridged the two outside pads as suggested on ucapps,the psu is putting out 5.3 volts,is this too much?
cheers
Paul
PIC18’s have an operating voltage range of 2 to 5.5v so you are within the maximum limit (just). On the basis that the PIC is the most important component there, you should be OK. You are outside of +/- 5% which is what is generally considered acceptable PSU tolerance though.
The only concern I would have is if the voltage was originally closer to 5v, this could indicate possible failing components in the PSU (The .3v could be AC ripple if the regulator is on the way out) but I don’t know the design of the C64 PSU so this could be normal?
Cheers
Phil
The PSU with square plug is for Amiga - the C64 PSU has round plug
Smart-ass fail. Commodore made PSUs for Amigas, so what? It’s still a PSU for an Amiga.
If it says commodore on it and was advertised as a commodore it is a commodore…so sayeth the markings 
If it says commodore on it and was advertised as a commodore it is a commodore…so sayeth the markings
It is.. because it was Commodore who made Amiga. They also made C16, VIC20, Plus4, PET and a ton of other machines too..
Apart from that they also made pocket calculators and wristwatches - a little background on Commodore http://en.wikipedia.org/wiki/Commodore_International
Amiga PSU http://amigakit.leamancomputing.com/catalog/images/amiga-psu.jpg
Commocore 64 PSUs http://jope.fi/cbm/cbm/c64psu.jpg
Amiga PSU has 5V and -12V/+12V with square plug http://www.hardwarebook.info/Amiga_500/600/1200_Power_Supply
C64 PSU has 5VCD and 9VAC with round plug http://www.allpinouts.org/index.php/Commodore_C64_Power_Supply
Anyways, we’re OT here 
initially i just wanted to mention it
Hiya,
Flemming and Nils…I was just having a bit of fun…here’s an excerpt from a pm I sent Flemming the other week “The commodore psu I have is really an amiga…okay I can live with that.”
Cheers
Paul
I looked at using an Amiga PSU as a temporary measure so didn’t want to chop the connector off. Looke like the socket for these things is hard to get held of, but didn’t look very hard.
Opened it up to solder my wires directly to the pads (not to be recommended) and found some of the voltages were high, think I got something like -17V off load.
Played it safe(?) and used a PSU from some kind of old computer equipment that has sat in the junk box for a while, seems to work fine except there is a smell of burning dust and a little purple flash sometimes…
But it works.
Needless to say, do not take chances with mains voltages, but you knew that bit already.
S
The commodore psu I have is really an amiga
No no no, it’s a Commodore, can’t you read? :frantics:
* nILS giggles