Sensors

Are you short on IO pins? Looking to increase the number of them? That’s what the GPIO Expander MCP23017 is for! It uses I2C communication to do so. With just two wires, 16 new fully configurable digital IO pins are added to a microcontroller.

Due to the jumpers on the board, the I2C address of a device can be changed. Thus, eight breakout boards can be connected to a microcontroller. All of the pins on the expander board have pull-out resistors that can be turned on and off.

The HX711 is a highly versatile load cell amplifier that is widely used in various applications requiring precise weight measurements. It is designed to convert analog signals into digital values, making it ideal for integration with microcontrollers, Dasduino boards, and other digital systems.

This load cell amplifier employs a 24-bit analog-to-digital converter (ADC) to ensure high-resolution and accurate readings. It supports differential input signals and offers two differential input channels, allowing the connection of up to two load cells simultaneously. This feature enables the measurement of both single- and multi-load cell systems, expanding its application range.

The HX711 incorporates an integrated voltage regulator, which provides a stable supply voltage for the load cells and ensures accurate and reliable measurements. It operates with a low supply voltage, typically ranging from 2.6V to 5.5V, making it compatible with a wide range of power sources. This breakout board features connectors for easy connection with other boards and microcontrollers within the easyC system. It also comes with switches for selecting the I2C address.

The HX711 breakout allows you to easily read the weight value from a load-cell sensor (mass sensor). This small ADC is of great precision and is capable of measuring very small changes in the load-cell resistance, whose signals are amplified with the built-in amplifier. Subsequently, this same information is digitally transmitted to a microcontroller that simply converts the numbers obtained into the actual weight. That’s why this breakout is very useful for projects with scales or presence sensors, either for individuals or industry.

Breakout supports the connection of load cells that are made by the Wheatstone Bridge technique, like most of the load cells. They usually have four wires, two for power supply (E + and E, most often red and black), and two for signal (A + and A-, most commonly white and green wire). The pins for these wires are also indicated on the PCB and it is easy to connect.

The TCRT5000 is an infrared (IR) reflective sensor module that is commonly used for proximity sensing and line-following applications. It consists of an infrared emitter and a phototransistor placed side by side in a compact package. The emitter emits infrared light, which gets reflected off nearby objects, and the phototransistor detects the intensity of the reflected light.

This sensor module is widely used in robotics and automation projects. It can be used to detect the presence or absence of objects by measuring the intensity of reflected infrared light. It is also commonly employed in line-following robots where it can detect and follow lines marked with contrasting colors.

The TCRT5000 operates on a supply voltage typically ranging from 3.3V to 5V. The breakout board provides digital and analog information through the easyC system. Sensor readings are obtained through easyC.

Product usage tips:

Two mounting holes enable easy mounting to surfaces.

ADC (Analog Digital Converter) is a device that reads analog signals (just like the analogRead () function in Arduino IDE) and converts them into a digital signal that can be read by a microcontroller. This breakout is based on the ADS1115 ADC, which reads values in 16-bit resolution, receives a maximum of 3.3V on its inputs and has a total of 4 channels (which can also be used as two differential). Works great with each microcontroller at 5V. It has 2 easyC connectors for easier connection on I2C communication.

The HC-SR04 ultrasonic sensor is an affordable and super-popular sensor that measures the distance between itself and an object located in front of the sensor. Very simple to use, it returns the distance in centimeters or inches.

In this variation, it comes on a board with an Attiny microcontroller that sends readings from the sensor as a digital signal via the easyC connector to the microcontroller, which makes its connections a piece of cake.

A loadcell is a small device that is able to weigh the load that is on it. Depending on the load, it provides very small output voltages that needs to be amplified (e.g. using an op-amp or an ADC with a built-in op-amp) in order to be able to do useful things with it. It has two fixed and two variable resistors connected to the Wheatstone bridge.

It needs to be connected to the HX711 board so you can read the readings with the Croduino. For more details, see How to Use the Module Tutorial in the upper right corner.

A mini version of our larger membrane keyboard that will still be sufficient for projects that need slightly less input.

• The size of the upper part: xcm x xcm
• Cable lenght: 9cm, flexible
• Connector: 5-pin

Small motion sensor HC-SR505 detects movement in its environment and it is based on infrared technology. It easily connects with Croduino/Arduino via digital pins. When it detects movement, digital output pin sets to HIGH (3.3V, analog 675).

• Model: HC-SR505
• Voltage: 4.5V – 20V DC
• Detection angle: <100 degrees
• Detection range: 3m
• Dimensions: 40 x 10 x 11mm

The MH-Z19 is a sensor that uses the non-dispersed infrared principle to detect CO2 in the air. It has built-in temperature compensation and high sensitivity to gas detection, and therefore has extremely accurate readings, and its outputs are on UART and PWM. It consumes little electricity and has a long service life.

NTC (Negative Temperature Coefficient) is a  resistor with variable resistance that changes depending on the temperature. The advantage of NTC is that it can measure a large temperature range, and measuring it with a voltage divider is very easy.

PMS7003 is a kind of digital and universal particle concentration sensor, which can be used to obtain the number of suspended particles in the air, i.e. the concentration of particles, and output them in the form of digital interface. This sensor can be used with different gadgets related to the concentration of particles in the air.

This adapter will help you connect our fingerprint sensor with ease.

This adapter will help you connect our air quality sensor PMS5003 with ease.

Load cell is a small device that is able to weigh the load on it. Due to the load, it provides very small output voltages that need to be amplified (eg using op-amp or ADC with a built-in op-amp) to find the use for the module. It incorporates two invariable two variable resistors connected to the Wheatstone Bridge. This sensor is made from high-quality materials, so it does not get affected by high temperature or continous load. You need to connect it with the HX711 to read information with Croduino.

This motion sensor uses microwaves, based on the radar doppler effect, to detect warm bodies in motion. Therefore, it can be used as an alternative to the PIR sensor, the advantage being that it does not require optical visibility as a PIR sensor, and the disadvantage is that it detects objects at a smaller distance from the PIR.

• Approximate frequency: 3.181GHz
• Input voltage: 4.0V – 28.0V
• Output voltage: 3.3V
• Dimensions: 36 x 17.3 mm

The digital voltmeter displays connected voltage using 7-segment characters.It contains three figures and measures up to 30V DC with precision of 1%. It is powerd by same wire at which it measures voltage making it easier to connect. On it sides it has two mounting holes.

• Measuring range: 5.0V – 30V
• Step: 0.1V
• Precision rate: 1%
• Voltmeter’s operating voltage: 5.0V – 30V
• Character color: red
• Dimensions: 23mm x 15mm x 10mm

Matrix keyboard is a system of 12 buttons that are interconnected that allowes us a more complex data input on Croduino/Arduino. With this keyboard you will create whole systems of menus, data entry and settings of various parameters.

• Dimensions: 70 x 50 mm

All real machines have an emergency stop button when pressed the whole machine stops. It can be very useful in case of the danger of someone working on that machine. If you want to install a similar thing on your project, here it is!

• Type: DPST
• Maximal voltage: 660V
• Maximal current: 10A
• Button diameter: 40mm
• Mounting hole diameter: 22mm
• Dimensions: 60 x 70mm

The water level sensor allows you to detect the height of water or some other liquid in the tank. This float sensor works on the principle of magnets and magnetic (reed) switches. Usually, it is mounted on the bottom or top of the tank, and when in water, the floating part with a magnet, triggers the magnetic switch. This alteration can be detected and trigger a certain action; eg filling the tank or launch alert.

The Shunt Resistor is a special type of resistor with small resistance which allows large currents to pass through it. This is useful for measuring the current in a circuit: due to the Ohm’s law and voltage drop on the shunt resistor, we can know exactly which current passes through it. For example, for this resistor whose maximum current is 50A, the voltage drop at that current will be exactly 75mV (0.075V). Using a precise ADC, we can accurately measure the current of our consumer or power source.

• Max. current: 50A
• Voltage drop for max. current: 75mV
• Dimensions: 120mm x 25mm

The Shunt Resistor is a special type of resistor with small resistance which allows large currents to pass through it. This is useful for measuring the current in a circuit: due to the Ohm’s law and voltage drop on the shunt resistor, we can know exactly which current passes through it. For example, for this resistor whose maximum current is 10A, the voltage drop at that current will be exactly 75mV (0.075V). Using a precise ADC, we can accurately measure the current of our consumer or power source.

• Max. current: 10A
• Voltage drop for max. current: 75mV
• Dimensions: 120mm x 25mm

The digital voltmeter and ammeter measures and indicates current and voltage in 7-segment digits! You can connect it to your power source to see your real-time characteristics or a consumer cost to check its consumption at any time. It measures voltages up to 100V and current up to 10A (shunt resistor embedded). This device is intended for installation in a housing.

Do you want to measure a higher current? Not a problem! The device comes with a cable to connect an additional external shunt resistor that will allow you to measure even higher currents. Shunt resistors can also be found in our store.