I want to use Arduino(atmega8) on breadboard using USBASP programmer and want to use Serial Monitor without using any Arduino board as ISP programmer. My questions: 1. Is such thing possible? 2. How do I do that?

1 Answer 1


How to use Serial Monitor without Arduino board?

Yes that is possible. Connect to the RX/TX pins on the breadboard chip. Remember these are 5V. You will need an Serial-USB or RS232 adapter to connect your development machine. Please see this blog post for some inspiration.


  • Don't forget to also connect GND.
    – Gerben
    Commented Aug 23, 2016 at 18:42
  • I stripped a USB cable and connected its green wire to RX and white wire to TX and red/black to supply pins of atmega8. But my PC is not detecting anything. (Atmega8 contains a arduino bootloader burnt using AVRDUDE and a basic analog to serial program. Please suggest where I am wrong. Commented Aug 24, 2016 at 5:38

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