carsten_the_dane Posted October 3, 2006 Author Report Share Posted October 3, 2006 ok. so before i go to my climbing training, i have a short question:I have an amp with a 5A/250V fuse, can i use it, or does it have to be 1A? Quote Link to comment Share on other sites More sharing options...
TK. Posted October 3, 2006 Report Share Posted October 3, 2006 1A should be prefered, 5A could damage the transformer or the rest of the circuit on shortsBest Regards, Thorsten. Quote Link to comment Share on other sites More sharing options...
modularkomplex Posted October 3, 2006 Report Share Posted October 3, 2006 Dont do that! It must have the same volt/ampere-values.Mike Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 4, 2006 Author Report Share Posted October 4, 2006 Ok. I have bought a new fuse (actually 3). Now 9V ac can be measured directly from the c64 PSU.The 7809 still gets very hot. I cannot measure 5V, and measuring right at the beginning of my vector board, where ground and 5V are, i get 1.7V.I have also noticed that after i turn of the PSU i can still measure low voltage (about .30) for a long time.Help please :'(Carsten Quote Link to comment Share on other sites More sharing options...
modularkomplex Posted October 5, 2006 Report Share Posted October 5, 2006 Do I get it right? You now get 1,7V measuring on the 5v-input? Or do you mean the output?The low voltage after switching off is normal, the electrolytic caps are storing some power. Mike Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 5, 2006 Author Report Share Posted October 5, 2006 I get 1.7 on the input. Not right on the c64 plug, but on the first solderings in the circuit. hmmm, i hope you get it.Im sure this has nothing to do with a short at that particular point. I tried resoldering, but got the same result. In the 5V output, i get 0V.I have not measured the 9V yet. I think i will do another try today, putting the circuit on a board like toneburst:http://www.midibox.org/forum/index.php?topic=7626.15It might create more oversight./Carsten Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 5, 2006 Author Report Share Posted October 5, 2006 i have recreated it on the a board like tonebursts. I can now measure 5V. Im a bit afraid to measure the 14V, how should i go about it?I think one of the problems with my old circuit (there were others) was the old input plug from the c64. i have now connected my circuit directly to the wires from the c64. And that seems to work.But again. How should i measure 14V?/carsten Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 5, 2006 Author Report Share Posted October 5, 2006 Nevermind. I measured against ground. and it gives me 14.26VNice. on to connect the everything./carstenPS: i will post my circuit a little later. for others to see. Quote Link to comment Share on other sites More sharing options...
modularkomplex Posted October 5, 2006 Report Share Posted October 5, 2006 Finally :DThe input plug, oh my... ::) was the last thing I'm thinking of.Hope you have learned a bit about troubleshooting while solving the problems.Mike Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 5, 2006 Author Report Share Posted October 5, 2006 Yep... maybe. thanks a lot for your help. I am very happy now, i have managed to create a tone. Yipii ;DOther problems have arrived, like no message on LCD and a bit of noise on track. But im not asking for help yet. Maybe i can figure it out myself. After all, i have seen text on my LCD earlier.Again thanks bothAnd toneburst and altitude/Carsten Quote Link to comment Share on other sites More sharing options...
puddingbrumsel Posted October 5, 2006 Report Share Posted October 5, 2006 Hi carstendo you know what the problem was with the old input plug ??I also finished my 1st optimized psu board yesterday. and first thing what happend - i switched on and the fuse of the c64-psu switched off ;) Have to test it again today. Hope i get the right fuses @ my local electronic-shop.G Christian Quote Link to comment Share on other sites More sharing options...
carsten_the_dane Posted October 5, 2006 Author Report Share Posted October 5, 2006 Not exactly. it think it was a problem with the female part of the input though. because right know i have soldered wires directly to the male part.But check out my board. And also tonebursts (the link is in a reply above).Compare my images to Altitudes PCB, and you can follow the lines around the board (i hope)http://www.midibox.org/forum/index.php?action=dlattach;topic=7626.0;attach=348;imageGreen marks: where i cut the cobber lines. Dont think they were all needed, but they helped me visualize.Red marks: Bridges.Blue/purple: components. hope you can read it.psu_top_korrekt.JPG Quote Link to comment Share on other sites More sharing options...
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