Hi group, i have a little problem with downloading from the IDE to optiboot (UNO) chip. Because of the nature of my project, I use the chip only (in my hardware) and a custom-made RS232/TTL converter. I added the "auto reset" circuitry, too (DTR to serial cap and a pullup of 10k). For now, when I …

Arduino RS232/TTL shifter programming

Topic		Replies	Views
programing ATMEGA 328 using external USB to TTL convertor Programming	3	7037	May 5, 2021
Help on "Arduino on breadboard" General Guidance	7	4743	May 5, 2021
Errore con Upload Generale	21	3834	May 7, 2021
Help needed to restore original pin settings! IDE 1.x	17	5556	May 5, 2021
avrdude Upload Error Troubleshooting	4	1318	May 6, 2021