2-CH TRIAC HAT
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Overview
Introduction
Dual Channels Bidirectional Triac HAT for Raspberry Pi, Integrated MCU, Commands Control, UART / I2C.
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Note: This is a relay device and the circuits are exposed. DO NOT touch the components onboard! We recommend you add an insulated enclosure when using.
The device will get hot when working, the higher the output power, the hotter it is. The device will cut off the output signal to protect the TRIAC when the temperate reaches 125°C. We recommend you add cooling devices to let the TRIAC HAT work normally under 80°C.
Features
- AC voltage: 100~600V
- AC current: 0~20A
- Dimensions: 65 × 56.5 (mm)
- Working voltage: 3.3V/5V
- Interfaces: UART/I2C
- Controller: STM32F030
- UART data rate: 1200 ~ 921600bps
- I2C data rate: ≤1Mbps
Interfaces
| PIN | Description |
| VCC | 3.3V/5V power input |
| GND | Ground |
| RX/SCL | UART data output/I2C clock |
| TX/SDA | UART data input/I2C data |
Jumpers
You can change the communication interfaces with the jumpers. Note that you can also change the DIP switch which is on the backside for different interfaces.
| Jumpers | Interfaace |
| A | I2C |
| B | UART |
Commands
UART
| 0x57 | 0x68 | Register address | Parameter H | Parameter L | Parity Bit |
I2C
| I2C Address | Register Address | Parameter H | Parameter L |
Register
0 x 01: Mode.
1: Voltage adjustment. It outputs a voltage according to the conduction angle. 0: Switch Mode. Only support turns on and off.
0 x 02: Channel enable.
3: Enable two channels. 2: Enable Channel 2 and disable Channel 1. 1: Enable Channel 1 and disable Channel 2. 0: Disable both channels.
0 x 03: Channel _1 Angle Conduction angle of Channel 1.
0 to 179
0 x 04: Channel _2 Angle Conduction angle of Channel 2.
0 to 179
0 x 05: Configure the frequency of the power grid.
0x32 50Hz 0x3C 60Hz
0 x 06: reset
0 to 65536: Reset after n (ms)
0 x 07: Configure the baud rate (n*100)
12~9216 Connect RX/SCL and TX/SDA can reset the baud rate to 115200
Work with Raspberry Pi
Notices
- HIGH VOLTAGE WARNING
- Solders are exposed on the backside.
Please add nylon standoffs to Raspberry Pi for protection. Do not touch it by hand.
- Reference connection:
Install Library
If you use bookworm system, only the lgpio library is available, bcm2835 and wiringPi libarary cannot be installed or used. Please note that the python library does not need to install, you can directly run the demo.
BCM2835
#Open the Raspberry Pi terminal and run the following command wget http://www.airspayce.com/mikem/bcm2835/bcm2835-1.71.tar.gz tar zxvf bcm2835-1.71.tar.gz cd bcm2835-1.71/ sudo ./configure && sudo make && sudo make check && sudo make install # For more, you can refer to the official website at: http://www.airspayce.com/mikem/bcm2835/
WiringPi
#Open the Raspberry Pi terminal and run the following command cd sudo apt-get install wiringpi #For Raspberry Pi systems after May 2019 (earlier than that can be executed without), an upgrade may be required: wget https://project-downloads.drogon.net/wiringpi-latest.deb sudo dpkg -i wiringpi-latest.deb gpio -v # Run gpio -v and version 2.52 will appear, if it doesn't it means there was an installation error # Bullseye branch system using the following command: git clone https://github.com/WiringPi/WiringPi cd WiringPi . /build gpio -v # Run gpio -v and version 2.70 will appear, if it doesn't it means there was an installation error
lgpio
wget https://github.com/joan2937/lg/archive/master.zip unzip master.zip cd lg-master sudo make install #for more details, you can refer to https://github.com/gpiozero/lg
- Install Python libraries:
# python2 sudo apt-get update sudo apt-get install python-pip sudo pip install RPi.GPIO sudo apt-get install python-smbus sudo apt-get install python-serial # python3 sudo apt-get update sudo apt-get install python3-pip sudo pip3 install RPi.GPIO sudo apt-get install python3-smbus sudo apt-get install python3-serial
Examples
Open the terminal and download demo codes by following commands:
sudo apt-get install p7zip wget https://files.waveshare.com/upload/e/ef/2-CH_SCR_HAT_code.7z 7zr x 2-CH_SCR_HAT_code.7z -r -o./2-CH_SCR_HAT_code sudo chmod 777 -R 2-CH_SCR_HAT_code cd 2-CH_SCR_HAT_code/RaspberryPi/
- C codes
Open the terminal and run the codes by the following commands:
cd c make clean make sudo ./main
Expected result: Connect a lamp to the output port, and connect the input supply, you can find that the brightness of the lamp is changed.
Note:
Only WIRINGPI and DEV_LIB are supported if you use the UART interface.
WIRINGPI, DEV_LIB, and USE_BCM2835_LIB are all be supported for I2C Interface.
- Python code
Open a terminal and run the codes by the following commands:
cd python cd examples sudo python main.py #If you need to modify the interface protocol, modify data_mode in main.py to be equal to 1 or 0 #data_mode=1 for UART #data_mode=0 for I2C
Expected result: Connect a lamp to the output port, and connect the input supply, you can find that the brightness of the lamp is changed.
Web control
The example is based on the Python Web frame.
Open the terminal, and install the bottle as below:
sudo apt-get install python-bottle cd Web_python sudo python main.py
Open the browser (host PC or telephone, we recommend you to use Chrome browser) and go to [IP of Raspberry Pi]: 8080.
Working with Jetson Nano
Install libraries
sudo apt-get update sudo apt-get install python3-pip sudo pip3 install Jetson.GPIO sudo groupadd -f -r gpio sudo usermod -a -G gpio your_user_name sudo cp /opt/nvidia/jetson-gpio/etc/99-gpio.rules /etc/udev/rules.d/ sudo udevadm control --reload-rules && sudo udevadm trigger
Examples
Download the demo codes by the following commands.
sudo apt-get install p7zip wget https://files.waveshare.com/upload/e/ef/2-CH_SCR_HAT_code.7z 7zr x 2-CH_SCR_HAT_code.7z -r -o./2-CH_SCR_HAT_code sudo chmod 777 -R 2-CH_SCR_HAT_code cd 2-CH_SCR_HAT_code/RaspberryPi/
- C codes
Open a terminal and run the following commands.
cd c make clean make sudo ./main
Expected result: Connect a lamp to the output port, and connect the input supply, you can find that the brightness of the lamp is changed.
Note: DEV_LIB is only supported by the C codes.
- Python codes
Open a terminal and run the following commands:
cd python cd examples sudo python main.py #If you need to change the interface protocol, change the data_mode to be equal to 1 or 0 in main.py #data_mode = 1 for UART #data_mode = 0 for I2C
Expected result: Connect a lamp to the output port, and connect the input supply, you can find that the brightness of the lamp is changed.
Load testing
| Output Power | With Fan | Without Fan |
| 1800W | 75℃ | 105℃ |
| 1000W | 50℃ | 75℃ |
| 600W | 35℃ | 50℃ |
The TRIAC may be destroyed if the working temperature is higher than 50°C for a long time, once the temperature reaches 125°C the device will force to protection status and cut off output. You should add cooling devices for normally working.
WARNING: DO NOT short the circuit, the TRIAC may burst if the circuit is shorted.
Resources
Demo codess
Documents
FAQ
Support
Technical Support
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