Expansion Board

1.Introduction

This expansion board is compatible with Keyestudio Nano Plus development board and Keyestudio ESP32 development board. The voltage on VCC can be set to 3.3V (ESP32) or 5V(Nano) via a DIP switch.

On the board, multiple modules and sensors are integrated. They are four buttons, four LED(red, yellow, green, blue), six WS2812 RGB LED, a buzzer, a PIR motion sensor, a IR receive sensor, a sound sensor, a photoresistor, an 8002 amplifier, a potentiometer, an ultrasonic sensor, a 4-bit digital tube display, an 8x8 dot matrix display and an LCD 1602 display.

For an easy wiring and to avoid a wrong-wiring-caused burnout, external VCC and GND are not required for all these modules and sensors. What’s more, each pin possesses its own VCC and GND, which brings a higher compatibility to the board and provides more opportunities for extended learning of other modules.

2.Parameters

Working voltage: 5V / 3.3V

DC power supply: 7-12V

USB power supply: 5V

Working current: ≥35mA

Working temperature: –10°C ~ +65°C

Dimension: 180x131x28(mm)

3.Module Location

4.Pin and Switch Description