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Hi!
I need a supply with 5V/1A output from 5-24V input.
The LM3478 could have been excellent, but I won't probably be able to fabricate a prototype with a mini-so8. Looking for something which is SO or DIP. Any recommendations?
gtp-usb+ firmware
Is there anyone who knows if there is needed to do something special with the .hex file to the GTP-USB Summer 2005 version when programming the 2550? I'm starting to wonder if the problem is in the .hex-file or maybe winpic800.
winpic800
I now have vpp at about 12.5V, I increased the 2k2 resistor from the last capacitor to 27k.
It can identify wich pic I am trying to program, and the hardware test goes ok.
But I still have the same problem, in winpic800 when trying to program it almost immediatly goes up to 95% and...
winpic no answer is of hardware
I have a diode-tester on my multimeter and the diodes are fine and not reversed. The voltage increases over each capacitor, just not as much as it should. Don't really know what could be the problem. The USB on my _laptop_ should be able to output as much current...
gtp-usb summer 2005
I have the one with 3 diodes and 3 capacitors. I don't have any errors in the connection, but when I measure the individual voltages over each cap the voltage after the second one is only about 8V, so I guess the problem is somewhere in between there.. I'll search for errors...
gtp-usb plus firmware
It's an old firmware and an old version of the GTP-USB and it should be correct. I don't know why the VPP won't go to 13,5V as it should be, have to look that over..
errores en gtp usb summer
I've built a GTP-USB+ (summer edition) programmer. I use it with winpic800 (3.55f) but when I try to program a pic (18F4585, but have tried others) it says "Error - No is answer of hardware" or something like that.
I've measured the voltage on the programmer and it...
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