Atmel AVR Programmer USB Circuit Atmega8 – Electronics Projects Circuits
Amazon.com: HiLetgo USBTiny USBtinyISP AVR ISP Programmer 6/10 Pin Bootloader for Arduino UNO MEGA : Electronics
USB Tiny USB tiny ISP AVR ISP Programmer for Arduino Boot loader Meag2560 UNO R3+6-pin connector+USB B jack cable - Newegg.com
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