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Started by WacKEDmaN, 05:44, 24 December 22
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Quote from: WacKEDmaN on 09:19, 05 January 23@Bryce .. im i right in thinking that the GBS should be SINKING current through the vga connectors....not SOURCING?im beginning to think about putting diodes on the RGB+S+GND lines so power cant get back into the CPC with it off...
Quote from: Bryce on 11:48, 05 January 23Also, could you post a picture or the model number of that buck. It definitely ISN'T running at 52Hz, that's the mains ripple you're measuring.
Quote from: SerErris on 11:18, 05 January 23Diodes will have a forward voltage drop and a forward voltage minimum. The lowest I know of has 0.4 volt drop (and minimum voltage to actually even work). So you will drop at least 0.4 volts of your max 1V RGB voltage.More typical diodes will drop 0.7 volts and will make your picture all black, as this is the video standard threshold between all black and all white. (0.3 means black, 1v means white).So no, diodes in the RGB path will not help anything.
Quote from: jb2590 on 18:57, 07 January 23I tried to reproduce your issue and found my own I have 2 bench power supplies. one only puts out 1 amp and I think its a bit too weak for the initial spike. but with my 4amp supply when I try to power both the GBS and CPC it wont boot. I also tried to use the wall wart with the multimeter in ammeter mode and it did the same thing?It boots no problem with the wall wart and the splitter, but if I try to use a PSU with an ammeter it goes from around 300ma to almost 1amp but no boot. I think maybe I should buy a better, more modern bench PSU? There is something going on that I don't understand right off hand. https://drive.google.com/file/d/1fduS-IFp6oYwDoxuoHwDuMTKOqjIJ1r-/view?usp=sharing
Quote from: WacKEDmaN on 06:12, 19 January 23i give up...i really dont think its gonna fix the issues....im just gonna use seperate supplys n be done with it....5 attempts at making this bloody thing.... all bodgy with the LM317T.... last attempt was to try a 7805CT... got it all done...powered it up... effing pinout on the 7805CT is different than the pinout i looked up... toast! (and dont have any spare)then tried straightening my soldering iron tip...well i snapped the bastard in two and took a chunk outta my hand and leg at the same time SMH....so no more soldering for me for at least a month....
Quote from: Bryce on 09:24, 19 January 23That soldering iron looks like it was ready for retirement anyway.
Quote from: pelrun on 10:35, 19 January 23Not that I want to laugh at others misfortune, but trying to straighten one of those irons with brute force only ever has that one outcome...It's an opportunity though - get a pinecil v2 to replace it (and a proper usb-c charger like the pinepower if you don't already have one), they're incredibly capable and far too cheap to ever consider buying one of these dodgy old mains irons ever again.
Quote from: pelrun on 11:17, 19 January 23You misunderstand. The pinecil (and the TS100 before it) is not a toy. It is *literally* more powerful than the conventional weller/hakko soldering stations in the $500 range, and really is only second to the absolute high-end JBC or Metcal stations that are $1000+. I'm not exaggerating, I've used them all extensively and this is my professional opinion.And yet it's only US$25. (US$50 if you need the USB-C charger as well.)
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