STK500 Compatible ISP using AVR microcontroller - ATMega32 AVR
KeeYees 2 pieces downloader programmer for USBASP for ISP with cable and 10 pin to 6 pin adapter board for 51 for AVR series microcontroller: Amazon.de: Business, Industry & Science
Professional AVR Experiment Board USB ISP Programmer Circuit – Electronics Projects Circuits
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