USB-RLY08-C - 8 Channel Relay Module hub-displays Motor supply voltage: 6 V

Motor supply voltage: 6 V to 32 V

and two 5-tooth encoder wheels

the board can get hot enough to burn you when the current is in the tens of amps

Reverse Polarity Protection

you can leave VIN disconnected and bypass the built-in regulator by connecting 3

USB-RLY08-C - 8 Channel Relay Module hub-displays Motor supply voltage: 6 VThe USB RLY08 C is an update of the obsolete USB RLY08 B. The only change is an improved USB footprint on the PCB to allow correct seating with multiple manufacturers, otherwise is a drop in replacement. Features: Relays 8 Power Powered from standard USB bus Control interface USB Relay current Up to 1Amp @30vdc or 60vac. 500mA@110vac. 250mA@250vac Connections Screw Terminals for N O N C and Common contacts.