Raspberry Pi GPIO Test Expansion Board PCF8591 Module Onboard LED IO Port Detection ADC/DCA Sensor

Features 1 Based on the Raspberry Pi 40PIN design it can be directly inserted 2 Lead out all GPIO function pins and test whether all pin functions are normal 3 As a test board test whether all pins of Raspberry Pi 3B 4B CM4 are intact 4 As an expansion board this module includes LED basic functions you can get started easily 5 This is a simple expansion board suitable for beginners of Raspberry Pi 6 The hole position of Raspberry Pi 3B 4B can also work on zero 7 Comes with demo code and user guide easy to use 8 The onboard ADDA chip can read ADC signals as a sensor expansion board and can send out DAC signals 9 On board industrial wiring terminal female port the terminal has interface definition stickers which is more beautiful and practical Package Include 1 GPIO Expansion Board1 Screw Bags