Solid state relay
Project description
Python-OC03
The OC03 xChip is a low-voltage control relay module able to switch AC and DC loads. It is based on the PCA9554A and TLP241A.
The optically isolated relay is controlled by a PCA9554A IO expander, which provides an control interface to the switch. The PCA9554A has several selectable I2C addresses accessible via solder pads.
The TLP241A photorelay consist of a photo MOSFET optically coupled to an infrared light emitting diode which switches a AC or DC load. It provides an isolation voltage of 5000 Vrms, making it suitable for applications that require reinforced circuit insulation.
Usage
Mu-editor
Download Mu-editor
CW01 and CW02
- Use XinaBoxUploader and flash MicroPython to the CW01/CW02.
- Download Python packages from the REPL with the following code:
import network import upip sta_if = network.WLAN(network.STA_IF) sta_if.active(True) sta_if.connect("ssid", "password") upip.install("xinabox-OC03")
CC03, CS11 and CW03
- Download the .UF2 file for CC03/CS11/CW03 CircuitPython and flash it to the board.
- TO DO
MicroBit
- TO DO
Raspberry Pi
Requires Python 3
pip3 install xinabox-OC03
Example
from xOC03 import xOC03
from xCore import xCore
OC03 = xOC03()
# start OC03
OC03.init()
# sleep time
DELAY = 500
# infinite loop
while True:
# close relay
OC03.writePin(True)
xCore.sleep(DELAY)
# open relay
OC03.writePin(False)
xCore.sleep(DELAY)
Project details
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