RelayBit
Relay Bit provides a solution for controlling low and medium current/voltage devices and makes your projects intelligent. It could be a nice solution for controlling devices that could not be directly controlled by micro:bit's Digital I/Os. The standardized shield form factor enables a smooth connection with micro:bit.
Features
4 High quality 3v relays that loads upto 2A/24V DC or 2A/120V AC
90 Degree Micro:Bit Connector
Relay status indicator led's
Standardized Board shape design
Make your home IoT enabled
Mounting holes provided
Specifications
Channel - 4CH
Operating Voltage - 3V
AC Control Voltage - 120V @ 2A
DC Control Voltage - 24V @ 2A
Dimensions - 7 x 4.3 x 1.2 cm Approx.
Pinout
| Relays | Micro:Bit Pins |
| Relay 1 | P12 |
| Relay 2 | P13 |
| Relay 3 | P14 |
| Relay 4 | P15 |
Programming
Drag and Drop
Many of you might be interested in using the Relay Bit to develop advanced gadgets. If anyone does not have the idea about the process to run Relay Bit then can read the following steps to use Relay Bit.
Attach Micro:bit on stackable connector of Relaybit as shown below.
[[File::Relaybit.png|400px]]
Make sure jumpers are connected on P12, P13, P14, P15. You can also use any GPIO by removing the jumpers and connecting the relay pins with that pin using jumper cables.
Now visit the official website of BBC micro:bit (MakeCode) and create a new project.
https://makecode.microbit.org/
Click on Advanced >> Pins and use pins block to control relay as shown below.
Finally download this program block on your BBC Micro:bit by clicking on the download button.
You can use the green Molex connector to connect your devices with corresponding relays. You can control up to 4 devices using these 4 relays.
Alternate Method
You can directly drag and drop test.hex file to Microbit to run the above said program and Tap card/Tag to display their unique id on led matrix.
Resources
