Sensors

MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System can be used as a door or window security system. It produces the signal when moved away from each other which can be fed to the microcontroller to perform the desired action as per requirement.

This sensor suitable to use for trigger alarm or ON/OFF light inside a cupboard sliding door. This wired sensor is trigger by the magnet. When the magnet is closed by, the circuit is closed or open if the magnet far from the sensor.

If you want to Apply  Extra Security for your house then this Magnetic Switch is needed for you. This magnetic switch is used for triggering an alarm or ON/OFF light inside a cupboard sliding door

MC-38 Wired Door Window Sensor Magnetic Switch Home Alarm System can be used as a door or window security system. It produces the signal when moved away from each other which can be fed to the microcontroller to perform the desired action as per requirement.

This sensor is suitable to use for triggering an alarm or ON/OFF light inside a cupboard sliding door. This wired sensor is triggered by the magnet. When the magnet is closed by, the circuit is closed or open if the magnet is far from the sensor.

Connection Diagram of MC-38 With Arduino:

1. Easy to install
2. Strong concealment
3. Magnetic sensor alarm, control the switch of the circuit via the built-in magnet
4. Alarm when someone intrudes into your places
5. Can be used in places like apartments, hotels, offices, etc.
6. Ideal for residential or commercial use.
7. Designed to do embedded in the door or window frame.

If you want to build a device that is used to detect sense motion and almost always used to detect whether a human has moved in or out of the sensors range. Then this Sensor is needed for you. you can buy this sensor from Robu.in at a reasonable price

The PIR Motion Sensor Detector Module HC SR501 allows you to sense motion. It is almost always used to detect the motion of a human body within the sensor’s range. It is often referred to using “PIR”, “Pyroelectric”, “Passive Infrared” and “IR Motion” sensors.

The module has an onboard pyroelectric sensor, conditioning circuitry, and a dome-shaped Fresnel lens. It has a delay time adjustment Potentiometer and sensitivity adjustment Potentiometer. Compatible with ARDUINO, RASPBERRY PI, AVR, PIC, 8051, etc.

To know more about how to interface PIR sensor with raspberry Pi 

1. Infrared Sensor with Control Circuit Board
2. The Sensitivity and Holding Time are adjustable.
3. Blockade time: 2.5s (Default)
4. Sensitive Setting: Turn to Right, Distance Increases (About 7M); Turn to Left, Distance Reduce (About 3M)
5. Time Setting: Turn to Right, Time Increases (About 200S); Turn to Left, Time Reduce (About 5S).

This IR reflective sensor Module used TCRT5000 IR Sensor to detect colour and distance. This sensor module consists on an IR transmitter & an IR receiver. IR Transmitter continuously emits IR signal which is then reflected by an obstacle and is then detected by the IR receiver. TCRT5000 Infrared Reflective Sensor Module is often used in line following robots,object sorting Robot because this module can sense if a surface is white or black. The measuring distance range from 1mm to 8mm, and the central point is about 2.5mm. There is also an on-board potentiometer to adjust the sensitivity. The infrared diode will emitting the infrared continually when the module is powered ON, when the emitted infrared light has not been reflected or the strength is not big enough,the receiver diode will in the off state and output pin i.e. DO will be LOW.

Description of Line Tracking sensor TCRT5000L:-

•     Main chip: LM393,
•     Designed with reflected infrared sensor, indicator light.
•     Built in a potentiometer for sensitivity control.
•     On-board LM393 voltage comparator chip and infrared sensing probe TCRT5000L
•     Support 5 V / 3.5 V voltage input
•     On-board signal output instructions, output is high effective signal at the same time, the indicator lamp light                output signal can be directly and single-chip microcomputer IO connection & middot;
•     Signal detection sensitivity can adjust
•     Reserve all the way more circuits (P3 voltage drawn)
•     using TCRT5000 infrared reflection sensor
•     test reflection distance: 1 mm to 25 mm
•     Operation voltage: 3.5v-5V
•     Operation current: >15mA
•     wide voltage LM393 comparator
•     output form: digital switch output (0 and 1)
•     a fixed bolt hole, convenient installation.

Features of Line Tracking sensor TCRT5000:-

• Product Name : Infrared Obstacle Avoidance Sensor Module;
• Module Model : TCRT5000;
• Working Voltage : DC         3.5-5V
• Output Channel : 0/1;
• Detect Distance : 1-25mm;
• Focal Distance : 2.5mm
• Chipset : LM393;
• PCB Size : 32 x 14mm/1.3" x 0.55" (L*W)
• Total Size : 38 x 14 x 18mm/1.5" x 0.55" x 0.7"(L*W*H);
• Material : Electric Part
• Package Content : 1 x Infrared Obstacle Avoidance Sensor Module.

BFD 1000 specifically designed as a black line (white) XunQu, especially suitable for the complex of black and white line, cross black and white line detection, it has 6 roads high sensitivity infrared sensor (5 escapes patrol, 1 road), to the recognition of black and white line accurately, it has the following functions and features:-
1. BFD 1000 integrated no.5 high sensitivity tracking sensor, for the environmental impact of small, can accurate tracking to complex black line (white line), for the simple black line tracking more comfortable.
2. BFD 1000 integrated infrared Barrie sensor, escapes distance can be regulated through the slide rheostat.
3. BFD 1000 has a specially designed touch detection sensor, from the design of the robot is more simple.
4. BFD 1000 all of the output signal to a digital signal (v), conveniently connected with MCU.
5. All sensor output state BFD 1000 have LED lights as instructions, convenient debugging.
6. BFD 1000 support voltage of 3.0-5.5 v meet the demand of most systems.
7. Using the high sensitivity of the sensor, tracking range between 0.5 mm to 40 mm any change and dont need to do any adjustment.

Features:

1. 5 channel high sensitivity sensor
2. High accuracy for tracking black line.
3. Distance sensor at the front, distance can be adjusted
4. Special touch sensor design, making the robot design simple
5. Digital output signal
6. Indicator LEDs

1 x BFD-1000 Five Channel Infrared Tracking Module

DHT22/AM2302 Digital Temperature & Humidity Sensor is a premium quality Humidity & Temperature Sensor. You can buy this Sensor from Robu.in at a reasonable price.

All DHT22/AM2302 Digital Temperature & Humidity Measurement Sensor, TECH1120 are manufactured by using quality assured material and advanced techniques, which make them up to the standard in this highly challenging field.

DHT22/AM2302 Digital Temperature & Humidity Sensor is a low-cost digital temperature and humidity sensor. It uses a capacitive humidity sensor and a thermistor to measure the surrounding air and spits out a digital signal on the data pin (no analog input pins needed).

It’s fairly simple to use but requires careful timing to grab data. The only real downside of this sensor is you can only get new data from it once every 2 seconds, so sensor readings can be up to 2 seconds old. Simply connect the first pin on the left to 3-5V power, the second pin to your data input pin, and the rightmost pin to the ground. Although it uses a single wire to send data it is not Dallas One Wire compatible! If you want multiple sensors, each one must have its own data pin!

This MPR121 is a capacitive touch sensor controller driven by an I2C interface. The chip can control up to twelve individual electrodes, as well as a simulated thirteenth electrode The MPR121 also features eight LED driving… pins, when these pins are not configured as electrodes, they may be used to drive LEDs.There a four jumpers on the bottom of the board, all of which are set (closed) by default. An address jumper ties the ADD pin to the ground, meaning the default I2C address of the chip will be 0x5A. If you need to change the address of the chip (by shorting ADD to a different pin), make sure you open the jumper first. Jumpers also connect SDA, SCL, and the interrupt pin to 10k pull-up resistors. If you do not require the pull-up resistors you can open the jumpers by cutting the trace connecting them.

1.  Capacitive touch sensor controller driven by an I2C interface.
2. Can control up to twelve individual electrodes, as well as a simulated thirteenth electrode.
3. Eight LED driving pins.
4. Connection to the microcontroller /microprocessor via I2C bus.

MQ 8 Gas sensor is another one of Metal Oxide Semiconductor (MOS) type Gas Sensor of MQ Gas Sensors family involving MQ 2, MQ 4, MQ 3, MQ 7, MQ 135, etc. It is mainly used as a Hydrogen detects. This sensor contains a sensing element, mainly aluminum-oxide based ceramic, coated with Tin dioxide (SnO2), enclosed in a stainless-steel mesh. Whenever H2 gas comes into contact with the sensing element, the resistivity of the element changes. The change is then measured to get the concentration of the gases present. This hydrogen sensor has a small heating element present, which is needed to preheat the sensor to get it in the working window. It can detect the H2 gas in the concentration range of 100 to 1000ppm. As H2 gas is extremely flammable, its leakage in the industry can be very hazardous with loss of property and life as it is used very commonly in cooling applications.
To use the Sensor Module, you have to power the device with 5V supply and the Power LED will start to glow. To power it, you can use external supply or connect +5V and GND pin of Arduino. You should give it some preheating time before start reading the output. While measuring the gas present, the Output LED will glow in a specific concentration of the gas. You can change it by using the potentiometer.

Vibration sensor module alarm Motion sensor module vibration switch SW-420 module based on the vibration sensor SW-420 and Comparator LM393 to detect if there is any vibration that beyond the threshold. The threshold can adjust using an onboard potentiometer. When this no vibration, this module output logic LOW the signal indicates LED light, and vice versa.

If the module does not vibrate, the vibration switch was on the close state, the output of low output, the green indicator light. The product vibrates, vibration switches momentary disconnect, the output is driven high, the green light does not shine.

The output can connect to the microcontroller, which to detect high and low level; so as to detect whether the environment exists vibration, play a role in the alarm.

1. Using SW-420 normally closed type vibration sensor.
2. Comparator output, clean signal, good waveform, strong driving ability, >15mA.
3. Using a wide voltage LM393 comparator.
4. With bolt holes for easy installation.

It works as RFID reader/writer,1443-A card or a virtual card and also supports NFC with Android phone. It is also compatible with Arduino.

1. Support II2, SPI and HSU (High-Speed UART)
2. I2C / UART: 3.3V ~ 24V TTL
3. SPI: 3.3V TTL with 100-ohm resistors in series
4. Communication distance: 5cm~7cm
5. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
6. Work in NFC Mode or RFID reader/writer Mode
7. RFID reader/writer supports:
8. Plug and play, compatible
9. Built-in PCB Antenna, with 4cm~6cm communication distance
10. On-board level shifter, Standard 5V TTL for I2C and UART, 3.3V TTL SPI
11. Work as an RFID reader/writer
12. Work as a 1443-A card or a virtual card
13. Exchange data with other NFC devices such as a smartphone

1 x PN532 NFC RFID Wireless Module V3

This is a 4 switch digital touch sensor with capacitive sense technology, the TTP 224 IC offers capacitive sense input feed designed for touchpad control, followed by a 4- finger-sized touchpad. The board has a jumper’s arrangement to change the keypress output mode in Timed or Toggle, Active High or Active Low. Separate jumper adjustments are provided for changing the response time of the pressed key: 60mS fast mode or 160mS in Low power. The output side of the board has 6 pin headers, with 4 pins to be connected with the digital I/O of any microcontroller board (Arduino, ARM STM32). 4 status LED SMD types are provided to check the status of each pressed key. TTP 224 4 Channel Digital Touch Sensor is compatible with all Arduino’s board. The board finds applications in HMI(Human-machine Interface), mechanical Button key replacement.

1. TTP224 4-way switch digital touch capacitive touch sensor module
2. 4 keyboard TTP224 capacitive touch sensor IC
3. Onboard 4-level status indicator

This is a 1 Meter Long Waterproof, sealed and pre-wired digital temperature sensor probe based on DS18B20 sensor. It is very handy for when you need to measure something far away, or in wet conditions. Because they are digital, you don't get any signal degradation even over long distance.

These 1-wire digital temperature sensors are fairly precise (±0.5°C over much of the range) and can give up to 12 bits of precision from the onboard digital-to-analog converter. They work great with any microcontroller using a single digital pin, and you can even connect multiple ones to the same pin, each one has a unique 64-bit ID burned in at the factory to differentiate them. Usable with 3.0-5.0V systems.

The only downside is they use the Dallas 1-Wire protocol, which is somewhat complex, and requires a bunch of code to parse out the communication. When using with microcontroller put a 4.7k resistor to sensing pin, which is required as a pullup from the DATA to VCC line.

Cable specs:-

• Stainless steel tube 6mm diameter by 30mm long
• Cable is 36" long / 91cm, 4mm diameter (1 Meter Long)
• Contains DS18B20 temperature sensor
• Three wires - Red connects to 3-5V, Black connects to ground and White is data.

DS18B20 Sensor Technical specs:-

• Usable temperature range: -55 to 125°C (-67°F to +257°F)
• 9 to 12 bit selectable resolution
• Uses 1-Wire interface- requires only one digital pin for communication
• Unique 64 bit ID burned into chip
• Multiple sensors can share one pin
• ±0.5°C Accuracy from -10°C to +85°C
• Temperature-limit alarm system
• Query time is less than 750ms
• Usable with 3.0V to 5.5V power/data.

As long as the material used is in the correct shape and nature of any liquid or pressure, you can control the temperature. Applications of this Switch include shipbuilding industry, generating equipment, petrochemical and food industry, water treatment equipment, dyeing, and finishing industry, and hydraulic machinery.

1. Long-lasting life
2. Easy to use

BMP180 Sensor is an extremely precise low cost sensor from Bosch for measuring barometric pressure and temperature. Because pressure changes with altitude you can also use it as an altimeter! The sensor is soldered onto a PCB with a 3.3V regulator, I2C level shifter and pull-up resistors on the I2C pins. It is completely identical to the BMP085 in terms of firmware/software. 

Features:-

• Vin: 3 to 5VDC
• Logic: 3 to 5V compliant
• Pressure sensing range: 300-1100 hPa (9000m to -500m above sea level)
• Up to 0.03hPa / 0.25m resolution
• -40 to +85°C operational range, +-2°C temperature accuracy
• This board/chip uses I2C 7-bit address 0x77.

GY-53 VL53L0X Laser ToF Flight Time Ranging Sensor Module can be used for easy integration into your devices and basic gesture detection applications. Thanks to its 2.8V regulator and level shifters, the VL53L0X satellite board can be used in any application with a 2.8 to 5V supply.

The VL53L0X is a Time of Flight distance sensor like no other you’ve used! The sensor contains a very tiny invisible laser source and a matching sensor. The VL53L0X can detect the “time of flight”, or how long the light has taken to bounce back to the sensor. Since it uses a very narrow light source, it is good for determining the distance of only the surface directly in front of it.

Unlike sonars that bounce ultrasonic waves, the ‘cone’ of sense is very narrow. Unlike IR distance sensors that try to measure the amount of light bounced, the VL53L0x is much more precise and doesn’t have linearity problems or ‘double imaging’ where you can’t tell if an object is very far or very close.

The PCB section supporting the VL53L0X module is perforated so that developers can break off the mini PCB for use in a 2.8V supply application using flying leads. This makes it easier to integrate into development and evaluation devices due to its small form factor.

The module is designed for low-power operation. Ranging measurements can be automatically performed at user-defined intervals. Multiple thresholds and interrupt schemes are supported to minimize host operations. Serial port and PWM to read the data code: STM32, Arduino, 51 MCU.

Note that due to the infrared will be affected by the outside light, in the light will affect the maximum range of measurement, will not affect the measurement accuracy. Default configuration: serial baud rate 9600, automatic output, high precision mode. When using, please remove the sensor film.

The VL53L0X is the latest product based on ST’s patented FlightSense™ technology. This is a ground-breaking technology allowing absolute distance to be measured independent of target reflectance. Instead of estimating the distance by measuring the amount of light reflected back from the object (which is significantly influenced by color and surface), the VL53L0X precisely measures the time the light takes to travel to the nearest object and reflect back to the sensor (Time-of-Flight). Combining an IR emitter and a range sensor, the VL53L0X is easy to integrate and saves OEMs long and costly optical and mechanical design optimizations.

Note: The VL53L0X is delivered with a liner, in order to prevent potential foreign material to penetrate inside the modules holes during the assembly process. It must be removed at the latest possible step during final assembly, and anyway before module calibration.

Useful Links: Code and Libraries

1. VL53L0X 3-in-1 ranging and gesture detection sensor
2. Regulator: 5 to 2.8V range input voltage (output voltage: 2.8V)
3. VL53L0X signal interface level shifter
4. Serial Port PWM Output
5. True distance measurement independent of target size and reflectance
6. Able to function in multi-module applications
7. Small size mini-PCB
8. Breakout board, easy to integrate into the customer device
9. Allows basic gesture recognition use case.

HX711 module is a Load Cell Amplifier breakout board for the HX711 IC that allows you to easily read load cells to measure weight. This module uses 24 high precision A/D converter chip HX711. It is a specially designed for the high precision electronic scale design, with two analog input channel, the internal integration of 128 times the programmable gain amplifier. The input circuit can be configured to provide a bridge type pressure bridge (such as pressure, weighing sensor mode), is of high precision, low cost is an ideal sampling front-end module. 

HX711 is an IC that allows you to easily integrate load cell into your project. No need of any amplifiers or dual power supply just use this board and you can easily interface it to any micro-controller to measure weight. 

The HX711 uses a two wire interface (Clock and Data) for communication. Compared with other chips, HX711 has added advantages such as high integration, fast response, immunity, and other features improving the total performance and reliability. Finally it's one among the best choices for electronic enthusiasts. The chip lowers the cost of the electronic scale,at the same time,improving performance and reliability.

Buy the new XH-M131 DC 12V Light Control Switch Photoresistor Relay Module. The Light Detection and brightness detection, detection can be adjusted via potentiometer brightness valve point comes relays, and do all kinds of brightness detection switch, you can control all kinds of street lights automatically turn on at night, during the day and automatically turns off and car supplies control and automation equipment.

Using the photoresistor induction light intensity comes with the relay and direct control load. It has a Distribution bit sensitivity adjustment. The start relay threshold is set by adjusting the potentiometer. 12 V power input is designed for relay board regulator transistors to provide sensors and is Used to make the product more stable and reliable. It has four fixed bolt hole for easy installation.

1. XH-M131 DC 5V / DC 12V Light Control Switch Photoresistor Relay Module Light threshold can be adjusted by a potentiometer to set the relay start Input: DC5V / 12V
2. Load capacity: 10A / AC 250V or DC up to 30V RED LED ON: Indicate the Power ON
3. BLUE LED ON: Relay is working Module output terminal has three ports.
4. Weight: approx 20 g Material: Steel, Plastic, PVC

IR Sensor module has great adaptive capability of the ambient light, having a pair of infrared transmitter and the receiver tube, the infrared emitting tube to emit a certain frequency, encounters an obstacle detection direction (reflecting surface), infrared reflected back to the receiver tube receiving, after a comparator circuit processing, the green LED lights up, while the signal output will output digital signal (a low-level signal), through the potentiometer knob to adjust the detection distance, the effective distance range 2 ~ 10cm working voltage of 3.3V-5V. The detection range of the sensor can be adjusted by the potentiometer, with little interference, easy to assemble, easy to use features, can be widely used robot obstacle avoidance, obstacle avoidance car assembly line count and black-and-white line tracking and many other occasions.

Features of IR Sensor Module:-

• When the module detects obstacles in front of the signal, the circuit board green indicator light level, while the OUT port continuous output low-level signals, the module detects a distance of 2 ~ 10cm, detection angle 35 °, the detection distance can be potential adjustment with adjustment potentiometer clockwise, the increase in detection distance; counterclockwise adjustment potentiometer, the detection distance decreased.
• the sensor active infrared reflection detection, target reflectivity and shape of the detection distance of the key. The black minimum detection range, white maximum; small area object distance is small, a large area from the large.
• The sensor module output port OUT can be directly connected with the microcontroller IO port can also be driven directly to a 5V relay; Connection: VCC-VCC; GND-GND; OUT-IO.
• The comparator using LM393, stable.
• 3-5V DC power supply module can be used. When the power is turned on, the red power LED is lit.
• With the screw holes of 3mm, easy to install.
• Board size: 3.1CM * 1.5CM.
• Each module in the delivery has threshold comparator voltage adjustable via potentiometer, special circumstances, please do not adjust the potentiometer.

Interface(3-wire):-

• VCC external 3.3V-5V voltage (can be directly connected with the a 5v microcontroller and 3.3v microcontroller).
• GND external GND.
• OUT board digital output interface (0 and 1).

The 300W 10A DC-DC Step-down Buck Converter Adjustable Constant Voltage Module can be used to get adjustable output voltage ranges from 1.5V to 35V. The module provides a wide range of current output up to 10 A. With heat sink mounted it can easily manage to run high power application continuously (provided that for continuous high power output you need to use a cooling fan on the heat sink).

The Module is made from a dedicated benchmark IC and high-precision current sensing resistor, proving a more stable constant current, (when 20C to 100C constant current 1A, temperature drift less than 1%); and therefore it is particularly most suitable for LED driver applications. The output current of the module can be raised up to 10A(for continuous use it is recommended up to 8A with additional cooling fan).

To enhance the stabilization in output voltage has four high-frequency capacitance which gives the lower output ripple. Double heat sink design provides easy and fast heat dissipation. MOS Schottky diode independent heat sink, which heat dissipation is good, and wont affect each other. Also using large size Sendust Core and double pure copper wiring, improve working efficiency, reduce fever.

The module has onboard 3296 multiturn potentiometers for high accuracy voltage and current regulation to provide good stability. As voltage and current are adjustable, it gives very easy to use at multiple Application such as battery charging, LED Driver power supply, Vehicle Power Supply, etc which makes the module Multipurpose and hence this module is always in demand from our maker because of its wide range of application and low cost.

Applications:

1. High-power LED driver.
2. Lithium battery(or lead accumulator) charge.
3. Vehicle-mounted power supply.
4. Low voltage system power supply.
5. 6V, 12V, 14V, 24V battery charge.
6. On-board laptop power supply.
7. regulated power supply.
8.Low voltage power supply system.

1. First, determine the float voltage and charging current required by the battery to be charged (the target battery). The target battery disconnected from the module output, apply a voltage of 7V 32V to the module input, being sure to observe correct polarity.
2. Using the CV trimmer, adjust the output voltage to about 5V.
3. Switch your multimeter into its 10A current scale and measure the modules short-circuit output current. Turn the CC trimmer to.
4. adjust the current to the charging current required by the target battery.
5. Using the CV trimmer, adjust the modules output voltage to the float voltage required by the target battery.
6. Connect the target battery to the module output, observing correct polarity. Charging of the battery should commence.

1. Scope: High-power LED constant current driver, rechargeable lithium batteries 4V, 6V, 12V, 14V, 24V battery charging; nickel-cadmium nickel-metal hydride batteries (battery) charging, solar panels, wind generators.
2. Output voltage: continuously adjustable (1.25-35V) (applied to the input voltage is higher than the output voltage applications can boost).
3. Turn lights Current: current value * (0.1), turn the lamp current and constant value linkage, such as the constant value of 3A.
4. Turn the lamp current is set to a constant current of 0.1 times (0.1 x 3A = 0.3A), when the constant 2A, when adjusted to the current value, then turn the lamp current constant current of 0.1 times (0.1 x 2A = 0.2A).
5. This version is a fixed 0.1 times (actually turn the lamp current value is probably not very accurate) is full of instructions for charging.
6. Minimum pressure: 1V.
7. Output Ripple: about the ripple 50mV (without noise) 20M bandwidth (for reference) Input 24V Output 12V 5A measured.