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I corrupted my bootloader on one arduino, luckily I had a spare lying around. Please help as there is not a single tutorial to help my exact state

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  • not a single tutorial to help my exact state .... yes there are tutorials about using an Arduino as an ISP Commented May 19, 2018 at 22:32
  • read somewhere to use a capacitor to hold the reset to high state, in some tutorials, not used Commented May 19, 2018 at 22:37
  • Arduino as ISP and Arduino Bootloaders - arduino.cc/en/Tutorial/ArduinoISP Commented May 19, 2018 at 23:04

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I have a page about programming a bootloader using another Arduino.

Basically you grab the code from here and then make up wiring from the good device (which you put the sketch onto) to the device to be programmed, like this:

Arduino Nano        Target Nano

D10 (SS)            Reset
D11 (MOSI)          D11
D12 (MISO)          D12
D13 (SCK)           D13

Gnd                 Gnd
+5V                 +5V
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