Serial to usb home made using atmega8 ~ electronics circuit, schematic
Wireless sd card reader [esp8266].
Simple programmer avr your usb circuit diagram. Programming atmega328p microcontroller with arduino ide. Mach3 rnr
SERIAL to USB Home Made Using ATmega8 ~ Electronics Circuit, schematic
USB Low Pin Kit - Electronics-Lab
Schematic diagram of a USB player - Electronic Circuit
How to Build your Own USB PIC Programmer? - Circuits Gallery | Places
How to design the USB circuitry