Today I was finished your Open Programmer, flashed 18F2550 with firmware from
the site, assembled it into one device. And when I finally pluged it to PC
green LED started blinking, but windows does not recognize the device. Tried
to reflash te PIC controller, tried to change the quartz, but there is no
success... Where should i search the problem?
Assembled 1:1 as circuit, but 300 kOhm resistors i replaced with 330 kOhm
(can't find needed value).
P.S. Sorry or my bad English. Russian is my native language.
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try to put 1k resistor on VUSB via vdd, 470nf on ground, put 3.6v zener and clear Vregen on programming means disable internal voltage regulator, your problem will solve.
Last edit: Raymond 2014-03-18
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And don't forget to check wires, connections and connectors. Ripped wire was my problem. Programmer works very good for 4 years, without any problems (except old firmware, which I have updated today).
If you would like to refer to this comment somewhere else in this project, copy and paste the following link:
Today I was finished your Open Programmer, flashed 18F2550 with firmware from
the site, assembled it into one device. And when I finally pluged it to PC
green LED started blinking, but windows does not recognize the device. Tried
to reflash te PIC controller, tried to change the quartz, but there is no
success... Where should i search the problem?
Assembled 1:1 as circuit, but 300 kOhm resistors i replaced with 330 kOhm
(can't find needed value).
P.S. Sorry or my bad English. Russian is my native language.
I am also facing the same problem windows does not recognized the device,0 I tried a lot please help.
My bad. Have found corrupted path just under the USB connector. Programmer now
working.
Strange. Now I have an error in hardware test "regulator voltage is too
low"... Is that a transistor failure?
Problem solved.
Hi, fellow countryman :)
Russian translation patch is available https://sourceforge.net/tracker/?func=
detail&aid=3274428&group_id=306554&atid=1291562 you can try to apply
it and build op software with native language
try to put 1k resistor on VUSB via vdd, 470nf on ground, put 3.6v zener and clear Vregen on programming means disable internal voltage regulator, your problem will solve.
Last edit: Raymond 2014-03-18
Can anybody give the solution of not recongnization of USB in windows??? plz, I tried a lot.
same answer as in the other thread, check LED and component values.
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And don't forget to check wires, connections and connectors. Ripped wire was my problem. Programmer works very good for 4 years, without any problems (except old firmware, which I have updated today).