![Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/519nqTWkAiL._AC_UF1000,1000_QL80_.jpg)
Amazon.com: Geekstory for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro : Electronics
![Amazon.com: HiLetgo 51 AVR ATMEGA8 Programmer USBasp USB ISP 10 Pin USB Programmer 3.3V/5V with Cable : Electronics Amazon.com: HiLetgo 51 AVR ATMEGA8 Programmer USBasp USB ISP 10 Pin USB Programmer 3.3V/5V with Cable : Electronics](https://m.media-amazon.com/images/W/IMAGERENDERING_521856-T1/images/I/51HDklfauqL._AC_UF894,1000_QL80_.jpg)
Amazon.com: HiLetgo 51 AVR ATMEGA8 Programmer USBasp USB ISP 10 Pin USB Programmer 3.3V/5V with Cable : Electronics
![Communication between a USB/serial device and an AVR (atmega/Arduino) microcontroller - Electrical Engineering Stack Exchange Communication between a USB/serial device and an AVR (atmega/Arduino) microcontroller - Electrical Engineering Stack Exchange](https://i.stack.imgur.com/6790Z.png)
Communication between a USB/serial device and an AVR (atmega/Arduino) microcontroller - Electrical Engineering Stack Exchange
![Taidacent Atmega 32u4 Controller Bootloader Module Replace Pro Mini Usb 5v 16mhz Pro Micro Atmega32u4 Development Board - Buy Pro Micro Atmega32u4 5v 16mhz,Pro Micro Atmega32u4,Atmega32u4 Product on Alibaba.com Taidacent Atmega 32u4 Controller Bootloader Module Replace Pro Mini Usb 5v 16mhz Pro Micro Atmega32u4 Development Board - Buy Pro Micro Atmega32u4 5v 16mhz,Pro Micro Atmega32u4,Atmega32u4 Product on Alibaba.com](http://sc04.alicdn.com/kf/Hd2430598b4e3489abda9f62245de63f2m.jpg)