work in progress » V-USB tutorial (software-only usb for mega & tiny)
AVR-JTAG-USB-A
USB AVR ISP (In-System-Programmer)
USB to Serial Converter using AVR microcontroller - Electronics-Lab.com
MEGA2560 CH340G ATMEGA 2560 R3 USB Development Board ATMEGA 2560-16AU With Cable | eBay
Amazon.com: for ATMEL 51 AVR USB ISP ASP Microcontroller Programmer Downloader with Cable + 10Pin to 6Pin Adapter Board for Ender 3 or Ender 3 Pro Geekstory : Electronics
MRP01 - USB AVR Programmer (for ATmega, ATtiny, AT90 family with ATMEL Studio, Avrdude, Arduino)
USBASP AVR Programmer | 10100261 | Other by www.smart-prototyping.com
Simple USB AVR programmer, USBasp using ATMega8 microcontroller - ATMega32 AVR
ATMEL USB PROGRAMMER CIRCUIT ZIF SOCKET USBASP ATMEGA8 - ATMega32 AVR
Pololu USB AVR Programmer v2.1
USB AVR Programmer
Embedded Engineering : USBasp - USB programmer for Atmel AVR controllers
Simplest USB AVR programmer – Circuits DIY
AVRUSBBoot - USB bootloader for Atmel AVR controllers - fischl.de
Amazon.com: Electronics kit AVR ATMEGA16 Minimum System Development Board ATmega32 + USB ISP USBasp Programmer with Download Cable for ATMEL : Electronics
Bootload an ATmega Microcontroller & Build Your Own Arduino
Amazon.com: Electronics kit AVR ATMEGA16 Minimum System Development Board ATmega32 + USB ISP USBasp Programmer with Download Cable for ATMEL : Electronics
Atmel AVR Programmer USB Circuit Atmega8 – Electronics Projects Circuits
Pololu USB AVR Programmer v2.1
Communication between a USB/serial device and an AVR (atmega/Arduino) microcontroller - Electrical Engineering Stack Exchange
USB to Serial Converter using AVR microcontroller - Electronics-Lab.com