Schematic zoom of the Raspberry Pi 3 B+ pins. Adapted from [14

Download scientific diagram | Schematic zoom of the Raspberry Pi 3 B+ pins. Adapted from [14]. from publication: A Portable Low-Cost Ultrasound Measurement Device for Concrete Monitoring | This paper describes a new ultrasonic measuring device called “W-Box”. It was developed based on the requirements of the DFG Forschergruppe (research unit) CoDA for a portable device for monitoring of concrete specimens, models and actual structures using embedded ultrasonic | Measuring Devices, Ultrasound and Concrete | ResearchGate, the professional network for scientists.

Pololu - Motoron M2H24v16 Dual High-Power Motor Controller for Raspberry Pi (Connectors Soldered)

Schematics of Raspberry Pi 3 Model B - Raspberry Pi Forums

Update in 2022: X735 V2.5 has been update to X735 V3.0 version with width voltage DC 6V-30V input on march 28th 2022 and remove latching switch port. You must install shell script to enable the PWM fan to work since it need PWM signal to run, refer to X735 Software on WiKi.