Make your own Uno no longer detected
My Uno R3 is no longer detected when I plug it into the computer, so I need to reset the MEGA16U2 chip.
However all the instructions involve the reset jumper pins, but this board does not have those, instead having a USB C to Serial module, see attached photo. How can I reset the chip??
12 Replies
Heres the back where it is soldered on
Those joints don'T look good, can you hit them with a bit more heat and solder flux?
Also since the power LED is lighting up, try using a different USB-C cable. Some are Charge Only.
same result on my other cables, i'll try and solder them a bit better 😛
technically it should already work with the USB-C module even unsoldered. The USB connection is just between the USB-C cable and the ATMega16u2.
only the back side looks like bad solder joints. the top looks okay.
Hmm, so the question remains, how do we reset this module then?
it mentions a reset here
Yes, the RST pin is available on the connector-
https://docs.arduino.cc/resources/schematics/AKX00037-schematics.pdf
Can you see J2 written anywhere on the USB-C module?
@max i dont see J2 per se, but i do see it matches the soldering
the reset pin must be the one above LEDTX
so i just short that to ground and plug it in?
j3 is the right way round as you can see, j2 is reverrsed, like we do counting pins on an ic
you may want to clean up those solder joints, some look "cold"