• sales

    +86-0755-88291180

Raspberry Pi Pico Relay B User Guide

Overview

Industrial 8-Channel Relay Module For Raspberry Pi Pico, Power Supply Isolation, Photocoupler Isolation

Features

  • Onboard unibody power supply isolation, provides stable isolated voltage, needs no extra power supply for the isolated terminal
  • Onboard photocoupler isolation, prevent interference from external high-voltage circuit connected to the relay
  • High-quality relay, contact rating: 10A 250V AC or ≤10A 30V DC
  • ABS protection enclosure with rail-mount support, easy to install, safe to use
  • Breakout USB port and BOOT pin, make it easy to debug without disassembling the enclosure
  • PWR indicator, RGB LED, and passive buzzer outside the enclosure

Specifications

  • Operating voltage: 5V
  • Communication Protocol: USB
  • Communication interface: Micro USB
  • Relay channel: 8 ch
  • Contact form: 1NO 1NC

Pinout


Hardware connection

Relay BPicoDescription
VCCVSYSPower input
GNDGNDGround
CH1GP21Control pin of Channel 1
CH2GP20Control pin of Channel 2
CH3GP19Control pin of Channel 3
CH4GP18Control pin of Channel 4
CH5GP17Control pin of Channel 5
CH6GP16Control pin of Channel 6
CH7GP15Control pin of Channel7
CH8GP14Control pin of Channel 8
RGBGP13Control pin of RGB LED
BUZZERGP6Control pin of buzzer

Connection


Setup environment

Please refer to Raspberry Pi's guide: https://www.raspberrypi.com/documentation/microcontrollers/

Raspberry Pi

1. Open a terminal of Raspberry Pi
2. Download and unzip the demo codes to directory Pico C/C++ SDK

sudo apt-get install p7zip-full
cd ~
sudo wget  https://www.waveshare.net/w/upload/a/a1/Pico-Relay-B_code.7z
 
7z x Pico-Relay-B_code.7z -o./Pico-Relay-B_code
cd ~/Pico-Relay-B_code
cd c/build/p

c

1. Hold the BOOTSEL button of Pico, and connect the USB interface of Pico to Raspberry Pi then release the button.
2. Go into the build directory and add the SDK path.

cd ~/Pico-Relay-B_code/c/
cd build
export PICO_SDK_PATH=../../pico-sdk

3. Run the command cmake to generate the Makefile file

cmake ..

4. Run the command make to build and generate the executable file.

make -j9

4. after building, a uf2 file is generated. Press and hold the button of the Pico board, connect it to Raspberry Pi by USB cable and then release the button. Copy the main.uf2 file generated to the recognized movable disk (RPI-RP2).

cp main.uf2 /media/pi/RPI-RP2/

python

1. Refer to Raspberry Pi's guides to setup Micropython firmware for Pico
2. Open the Thonny IDE, and drag the demo to IDE and run on Pico as below.

3. Choose File -> Open -> Pico-Relay-B_test.py file and run it

Windows

  • Download and unzip the demo to your Windows desktop, refer to Raspberry Pi's guides to set up the Windows software environment settings.
  • Press and hold the BOOTSEL button of Pico, connect the USB of Pico to the PC with a MicroUSB cable. Import c or python program into Pico to make it run.
TAG: Raspberry Pi5 PCIe TO M.2 MINI Support Gen2 and Gen3 SSD Compatible 2230 2242 Raspberry Pi 5 ESP32 S3 Development Board 1.46 inch Round LCD 1.46inch Display 412x412 QMI8658 Sensor / MIC / SD /MP3 Audio /Battery Port LVGL/HMI For Arduino Raspberry Pi 8inch LCD 768x1024 Capacitive TouchScreen HDMI Display lilygo 2.66inch e-Paper e-link Module 360x184 4-Color Red Yellow Black White For Arduino Raspberry Pi STM32 Jetson Tutorial Information Wiki Program Code User Guide SpotPear Raspberry Pi 5 inch DSI MIPI LCD TouchScreen Display 7inch 720x1280 For Luckfox Lyra RK3506/ESP32-P4/Luckfox Omni3576 Raspberry Pi 21.5 inch Type C/HDMI Display Screen 1920x1080 Computer PC Phone Xbox/PS4/Switch Sipeed Lichee Tang Nano 20K FPGA RISCV Open-Source Retro-Game Linux MINI Development Board GW2AR-18 Raspberry Pi 500 (US) refined personal computer.built into a high-quality Keyboard STM32 0.96inch RGB OLED UART FT4232HL USB TTL RS232 Industrial UART 4-Ch UART Raspberry Pi 18.5inch FHD LCD 1920x1080 Capacitive TouchScreen Display For Raspberry Pi/Jetson Nano/ Pi5 PCIe USB TO TTL Mini FT232 UART Communication Converter Original FT232RNL Tutorial 1.47 inch LCD AXS5106L TouchScreen JD9853 Display 172x320 For Arduino/Raspberry Pi/Pico/ESP32 Sipeed RISCV LicheeRV Nano Super-Mini SG2002 AI RAM-256MB Pi5