avr - I bought USB > FT232RL, can I use it to program a bootloader onto an Arduino? - Arduino Stack Exchange
Amazon.com: USBasp Programmer Downloader Bootloader Flashing Kit for 51 AVR USB ISP ASP Microcontroller Compatible with Ender 3 Pro cr10 CR-10 3D Printer : Electronics
USB bootloaders for AVR microcontrollers - Do It Easy With ScienceProg
2PCS =1PCS YS-38 USBASP USB AVR Programmer for Atmel USB ASP USBISP ISP Bootloader NEW + 1PCS 10PIN TO 6PIN ADAPTER - AliExpress Electronic Components & Supplies
Installing an Arduino Bootloader - learn.sparkfun.com
atmega usb controller | AVR Freaks
Burning the Arduino Uno Bootloader Using Atmel Studio and the AVRISP mkII - YouTube
USB ISP Programmer für Atmel AVR - Firmware Bootloader flashen | eBay
Unable to burn bootloader with Atmel-ICE in Arduino IDE 1.8.13 - Avrdude, stk500, Bootloader issues - Arduino Forum
Micro USB ATtiny44 ATTiny45 ATTiny85 USBTinyISP Programmer Module For – diymore