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)