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OC03 is a low-voltage control relay module able to switch AC and DC loads.
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.
Relay out Datasheet
See this tutorial to get XinaBox ready for micro:bit in English
See this tutorial to get XinaBox ready for micro:bit in Chinese
XinaBox is pronounced as X-in-a-Box!
The XinaBox range currently includes over 80 sensors, bridges, cores, interfaces and other types of peripherals, and it is growing all the time. These ‘xChips’ will help you to super-charge your BBC micro:bit:
Micro:bit ready: see here for full details
The connection - plug and play, no wire
Build simple and complex circuits quickly and easily. The modular system allows you to connect xChips like building blocks - anyone can build a circuit in seconds, with no need for soldering irons, breadboards or consumables. And when you are done, disassemble the circuit and start again! It takes seconds when you know how.