And did add some troubleshooting. On my new board the Zener diode 3.3V of D- line is the caused.
I accidently removed got it wrong placed, the arrow pointing to Ground, and my computer had it
detected as Usbasp. But the problem only apply to my new Atmega8A-16PU and Atmega328P-PU.
Works perfect with or without Zener on D- line to my older production year of Atmega8A-16PU and
And also i got so many times failling to have it jump to bootload though the jumper bit is active low.
I just reset the chip rapidly and after 2-3 times of reset it is always detected. Drop me a message
if your board is still not be able be detected. Anyway my usbasploader boards none of them
working on Windows XP, lets forget that OS anyway. :D
Actually replacing the zener 3v6 with Fairchild 55C 3V6
500mW does fix the problem and the device is more stable
as it shown in the schematic.
|These are the glass Zener 3v6 |
|Zener diode to replace the ones on |