DESCRIPTION This power packed shield is perfect to get started with Raspberry Pi. It houses 14 functional modules with 6 expansion interfaces. Included in this expansion board is a 8-bit Digital to Analog Converter, which makes up for the lack of analog inputs for Raspberry Pi! Using I2C, you can read analog data from the PCF8591 IC without occupying additional resources from the Raspberry Pi. There are also 2 free analog interfaces on-board which can connect to external peripherals. Connected Peripheral Pin Mapping DHT11 4 LED Red 17 LED Yellow 27 LED Green 22 LED Blue 5 NeoPixel WS2812 12 Push Buttons 6, 13, 19, 26 OLED I2C Passive Buzzer 25 Ultrasonic Sensor Connector Echo 24, Trig 23 Analog Light Sensor PCF8591 A0 Potentiometer PCF8591 A1 LED White DAC PCF8591 DA FEATURES Ultrasonic Sensor Connector Analog Light Sensor Potentiometer White LED (DAC) I2C Connector LED Red/Yellow/Green/Blue DHT11 Temperature Humidity Sensor IR Receiver USB Serial Port PCF8591 8-bit Digital to Analog Converter Passive Buzzer SPI Connector Digital Pins Interface Analog Pins Interface 6x NeoPixel WS2812 LED 4x Custom Push Button 0.96" OLED (blue) Wow! All these into a compact hat! Perfect for your classroom lessons. SHIPPING LIST 1x Raspberry Pi Expansion Hat 1x 0.96" OLED (blue) 4x M2.5*17 Copper Spacers 9x M2.5*5 Countersunk Screws