Guide: How to use an Arduino as an In System Programmer (ISP)

Using Arduino Microcontrollers
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Hi Lauszus, com4 is correct, IDE Serial Port is com4 (upload ArduinoISP Sketch) and when type "avrdude -p m8 -P com4 -c avrisp -b 19200" RX and TX leds in Arduino Mega 2560 blinking.

I used "-c arduino" instead of "-c avrisp", avrdude return:
avrdude.exe: stk500_getsync(): not in sync: resp=0x00

But with "-c arduino" instead of "-c avrisp" pin 13 (SCK) goes high for about 300 ms.

Regards.
Enrico.