DLN-2 USB-I2C/SPI/GPIO Adapter
PC-I2C/SPI/GPIO/ADC/PWM Adapter with USB interface
Adafruit FT232H Breakout (USB to GPIO, SPI, I²C) | Elektor
X-keys USB General Purpose Input Output Module XK-1502-UHIO14-R
Adapter interfaces 40-pin Raspberry Pi add-ons over USB
SparkFun USB to Serial GPIO Breakout - CP2103 - BOB-00199 - SparkFun Electronics
USB digital GPIO I/O extender
USB-TO-GPIO Texas Instruments | Mouser
USB-TO-GPIO2 Evaluation board | TI.com
Amazon.com: 8 Channel USB GPIO Module with Analog Inputs
Numato 32 Channel USB GPIO Module | AltonaLab
DLN-2C USB-I2C/SPI/GPIO Interface (system on chip)
Simple GPIO using USB
USB Interface Adapter EVM Texas Instruments USB-TO-GPIO
64 Channel USB GPIO Module With Analog Inputs | Numato Lab
8 Channel USB GPIO Module With Analog Inputs | Numato Lab
IAN CANADA BridgePi Adapter USB Interface to GPIO - Audiophonics
8 Channel USB GPIO Module With Analog Inputs | Numato Lab
16 Channel USB GPIO Module With Analog Inputs | Numato Lab
Sinelec Technologies
8 Channel USB GPIO Module With Analog Inputs
8 Channel USB GPIO Module With Analog Inputs_ Botland - Robotic Shop
Numato and Pi Supply generic USB GPIO boards
