I have several standalone atmega328 chips, each running on it's own board. I use a standard FTDI breakoutboard to upload code to these chips. I have to do batch uploads so I hook up board A, upload the code, disconnect the TX/RX/RST/GND connector from standalone board A, plug it into board B, and up…

FTDI upload to standalone: COM in use when switching standalone boards

Paul_B May 6, 2014, 11:57am 4

So your standalone board is powered by the FTDI adaptor?

Let me guess - you have a 47µF capacitor on the 5V line on the standalone board?

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