'Mini' Prong Soil Moisture Sensor for BBC micro:bit - Datasheet

Layout and

Dimensions:

Connecting a BBC micro:bit:

The board has been designed to

connect to the BBC micro:bit with

crocodile clips, as shown to the

right.

Clip to P0, 3V and GND holes of the

BBC micro:bit, and the Mini Prong

PCB.

The Mini Prong ‘0’ pad can also be

connected to P1 or P2 if P0 is

already in use.

Mini Prong : soil moisture sensor for the BBC micro:bit

www.kitronik.co.uk/56107

Introduction: Mini Prong is a sensor board that can be connected to a BBC

micro:bit to monitor the moisture present in soil. The two conductive tines are

placed into the soil. Any water or moisture in the soil will conduct to give an

analogue voltage that can be read by the BBC micro:bit.

Power Supply:

Prong is powered from the 3V supply of the BBC micro:bit.

Voltage signal:

To determine the moisture level, the signal is brought out to Pin 1 on the BBC

micro:bit as an analogue voltage The voltage will range between 0V (dry) and 3V

(wet).

The board is 1.6mm thick

Software:

This simple example shows a happy

face when the soil is damp, and a

sad face when it is dry. The pause is

used to space readings out.

3 x connection pads for BBC

micro:bit

43mm

Drill holes spaced for

depth measurements

(3 hole marker is 5mm

1 hole marker

between is 2.5mm)

33 mm

19mm

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Mini Prong : soil moisture sensor for the BBC micro:bit www.kitronik.co.uk/56107 Introduction: Mini Prong is a sensor board that can be connected to a BBC micro:bit to monitor the moisture present in soil. The two conductive tines are placed into the soil. Any water or moisture in the soil will conduct to give an analogue voltage that can be read by the BBC micro:bit. Layout and Dimensions: 33 mm 3 x connection pads for BBC micro:bit Power Supply: Prong is powered from the 3V supply of the BBC micro:bit.