I've built a FTDI board to get from USB to the arduino and it works perfectly but I am looking at doing the same with a Mega8 instead. If I do build the interface with a Mega8 instead is it possible to make the Mega8 reprogram the sketch on the 328? I am thinking of sticking an SD card on the board …

Reprogramming 328PU using Mega8 & SD card

Topic		Replies	Views
program an atmega328 with a mega General Guidance	8	2842	May 5, 2021
Reflash Arduino mega directly from SD card Libraries	1	1512	May 6, 2021
Arduino Mega For Programming An Atmega328 3rd Party Boards	4	1091	May 6, 2021
Use arduino mega to load sketch to ATmega328 ? Interfacing	5	2861	May 6, 2021
SD Card boot loader 3rd Party Boards	1	1253	May 6, 2021