Kitronik Prong Soil Moisture Sensor for BBC Micro:bit - No Micro:Bit

The Prong soil moisture sensor for BBC microbit mounts directly to a BBC micro:bit to monitor the moisture present in soil. This is a sensor board that doesn't require an alligator clip or jumper wire. Place the two conductive tines into the soil. Any water or moisture in the soil will conduct to give an analogue voltage the BBC micro:bit can read.

The prong gets power from BBC micro:bit's 3V supply. To power the circuit, connect it to the BBC micro:bit using either a USB or JST connector. Prong and the BBC micro:bit can also be powered from the Mi:Power board to create a compact stand-alone unit.

The BBC micro:bit can be bolted on the board using 3 x M3 nuts and screws. Place the screws through the P1, 3V and GND holes of the PCB and BBC micro:bit, then use the M3 nuts to fasten together on the back of BBC micro:bit. Alternatively, you can use croc-clips to connect between the Prong and the BBC micro:bit.

If also using the Mi:Power board the BBC micro:bit can sound an alarm if the soil becomes too dry.

When fitted to the Prong moisture sensor, the micro:bit can be coded via any of the micro:bit editors, such as the Microsoft MakeCode editor.

Requires:

• 1 x BBC micro:bit (available as an optional extra)