Hello. I have uploaded firmware onto my mega2560 and want to re-install another code. How do i reset the mega2560? So i can put new code onto it.

Ive just started playing with this arduino mega2560 for my 3d printer.
I have not tried to install any other code. Wanted to get opinions first.

just upload the new firmware there's no need to reset,,

... and that's an electronics question, not a General one. Just saying :-)

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

noted Traumflug, most admit I rarely view the tronic section " should do.