Kitronik Ultrasonic Distance Sensor HC-SR04 5V Version

The Grove Ultrasonic Distance Sensor is an ultrasonic transducer that utilizes ultrasonic waves to measures distance. It can measure from 3cm to 350cm with the accuracy up to 2mm. It is a perfect ultrasonic module for distance measurement, proximity sensors, and ultrasonic detector.

This module has an ultrasonic transmitter and an ultrasonic receiver so you can consider it as an ultrasonic transceiver. Similar to sonar, when the 40KHz ultrasonic wave generated by the transmitter encounters the object, the sound wave will be reflected back, and the receiver can receive the reflected ultrasonic wave. It calculates the time from the transmission to the reception, and then multiplies it by the speed of the sound in the air(340 m/s) to calculate the distance from the sensor to the object.

Compared with traditional ultrasonic module, the HC-SR04, the Grove Ultrasonic Distance Sensor integrates a single-chip microcomputer, and the transmitting signal and the receiving signal share one pin by time division multiplexing, so only one I/O pin is occupied. Another difference is that HC-SR04 only supports 5v voltage, while Grove - Ultrasonic Distance Sensor supports 5v and 3.3v. As we know, the Raspberry pi I/O only supports 3.3v. Therefore, Grove - Ultrasonic Distance Sensor can be directly connected to the I/O of the Raspberry Pi, but HC-SR04 needs to use a voltage conversion circuit.

Features:

3.3V/5V compatible, wide voltage level: 3.2V ∼ 5.2V.

Only 3 pins needed, save I/O resources.

Wide measurement range of 3cm ∼ 350cm.

Easy to use, grove connector, plug and play.

Possible Applications:

Distance measurement.

Ultrasonic detector.

Proximity alarm.

Smart car/buggy/robot.

Dimensions:

Length: 50mm.

Width: 25mm.

Height: 16mm.

The Octopus CO2 Gas Sensor, part of the OCTOPUS series, features a consistent design with the same outlook, PCB fixing holes, and connections as its counterparts. As CO2 concentration increases, the output voltage decreases, allowing users to easily obtain CO2 readings through our brochures and coding samples.

The CO2 probe is crafted from industrial-grade materials, rendering it highly responsive to CO2 while resisting interference from alcohol and CO. It excels in performance with rapid response times, even in varying temperature and humidity conditions. Additionally, the onboard heating circuit efficiently converts 5V to a stable 6V voltage, enhancing the adaptability of the CO2 Gas Sensor.

Please note that this sensor requires a breakout board for operation, and it is typically paired with the Elecfreaks IOT:BIT board by the manufacturer.

Sensor:bit is a breakout board based on micro:bit. It has extended all available IO ports on micro:bit, and lead out them in the form of GVS. With this board, we can extend various 3V electric brick modules like LED light, photocell, etc.. On the board, it has integrated a buzzer and an audio jack, which allows you to hear music from the buzzer or with headphones.

FEATURES

Extend most IO ports on micro:bit by GVS pins.

Independently lead out IIC interface. Enable to plug in IIC components like OLED, BME280, etc..

Integrated a buzzer and an audio jack.

Support interface.

Mark out each IO port with silk printing.

Add passive infrared detection (PIR) to your project with this PIR Motion sensor large lens version. Its 2.54mm pitch connector pins makes the job of connecting it to your project an easy one.

It features a large lens which allows for a long range and a wide viewing angle. Typical values for detection are; up to 9m detection range and a viewing angle of up to 120°.

The operating voltage is between 3V - 5.5V with a max current of 100uA. So, it's operating requirements won't be much of a drain on power, which is good news if your power is being supplied by batteries.

Features:

It has a long detection range, up to 9m.

It features a wide viewing angle, up to 120°.

Very low power consumption.

Dimensions:

Length: 36mm.

Width: 26mm.

Height: 21mm.

Pin Pitch: 2.54mm

The Mini Prong soil sensor is a short version of the original Prong sensor that has been specially adapted for use with the Kitronik Greenhouse Kit for BBC micro:bit. The Mini Prong soil moisture sensor for BBC microbit is a sensor board that can be connected to a BBC micro:bit with crocodile clips to monitor the moisture present in the 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.

Mini Prong is powered from the 3V supply of the BBC micro:bit. Use either the USB or JST connector on the BBC micro:bit to power the circuit. The board has been designed to work with croc-clips, to connect between the Mini Prong and the BBC micro:bit. When fitted to the Mini Prong moisture sensor, the micro:bit can be coded via any of the micro:bit editors, such as the Microsoft MakeCode editor. The Datasheet at the foot of this page includes technical information and a MakeCode blocks coding example.

Note: To ensure that the mini Prong moisture sensor has a long and fulfilling life, it is better to write your code to perform a moisture check every so often rather than continuously. When the check is performed continuously it promotes rapid erosion of the electrodes.

Features:

Measure soil moisture levels.

Attach to the micro:bit with crocodile clips.

Compatible with both BBC micro:bit V1 and BBC micro:bit V2.

Write code for it with any micro:bit coding editor.

Dimensions:

Length: 33mm.

Height: 43mm.

PCB Thickness: 1.6mm.