USB ASP AVR Microcontroller Universal USB Programmer – eTechPath
Kanda - Guide to AVR ISP Circuit Schematics
ATMEL AVR USB Programmer and Rapid Prototyping Board by Tobias Frost
Make your own, ultra simple, universal AVR programmer !! – Embedded Electronics Blog
Flash the AVR Atmel ATtiny Chips with a Modified CH341A ISP Programmer
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
USB AVR Controller downloader - programmmer
ISP Programmer/Burner with circuit diagram for AVR Atmega Micro Controller