Hemal Electronics

AM2301 Capacitive Digital Temperature & Humidity Sensor sensor is one of the commonest from the range of DHT temperature sensors; and boasts a relatively high-temperature measurement accuracy of 0.5C in 0.1C steps with a relative humidity accuracy of 3%.

It has only 3 wires, including power and ground, meaning only one digital pin is required to interface it to a microcontroller. For Arduino development platforms the sensor is very well supported by the DHT library available from the Arduino Playground website.

• The Passive Infrared Sensor (PIR) sensor module is used for motion detection. It is often referred to used "PIR", "Pyroelectric", "Passive Infrared" and "IR Motion" sensor. The module has an on-board pyroelectric sensor, conditioning circuitry and a dome shaped Fresnel lens. It is used to sense movement of people, animals, or other objects. They are commonly used in burglar alarms and automatically-activated lighting systems.

   

  Specifications:- 

   

  • Color: White + Green OR  White + Blue
  • Infrared Sensor with Control Circuit Board
  • The Sensitivity and Holding Time Can be Adjusted
  • Working Voltage Range: DC 4.5V- 20V
  • Current Drain: <60uA
  • Detection Range: <140°
  • Voltage Output: High/Low level Signal: 3.3V TTL output
  • Detection Distance: 3 to 7m (can be adjusted)
  • Delay Time: 5 to 200s (Can be Adjusted, Default 5s +/- 3%)
  • Blockade time: 2.5s (Default)
  • Work temperature: -20-+80°C
  • Dimension: 3.2cm x 2.4cm x 1.8cm (Approx)
  • Sensitive Setting: Turn to Right, Distance Increases (About 7M); Turn to Left, Distance Reduce (About 3M)
  • Time Setting: Turn to Right, Time Increases (About 200S); Turn to Left, Time Reduce (About 5S).

Additional Information:

• Pay Mode Terms: T/T (Bank Transfer)

• Power Consumption of 3.5mA at VCC = 5V for Energy Efficiency
• Miniature Construction
• Single Current Sourcing Output
• Linear Output for Circuit Design Flexibility
• Low Noise Output Virtually Eliminates the Need for Filtering
• A Stable and Accurate Output
• Temperature Range of -40°C to +85°C
• Responds to Either Positive or Negative Gauss

ECG Monitor Sensor Module is based on AD8232 Analog Device IC. This is a cost-effective ECG Sensor used to measure the electrical activity of the heart. This electrical activity can be charted as an ECG or Electrocardiogram and output as an analog reading. ECGs can be extremely noisy, out AD8232 Single Lead Heart Rate Monitor acts as an op amp to help obtain a clear signal. This sensor can be connected to an Arduino/Raspberry Pi, etc. Sample codes are easily available on the internet.

The AD8232 is an integrated signal conditioning block for ECG and other biopotential measurement applications. It is designed to extract, amplify, and filter small biopotential signals in the presence of noisy conditions, such as those created by motion or remote electrode placement.

The AD8232 module breaks out nine connections from the IC that you can solder pins, wires, or other connectors to. SDN, LO+, LO-, OUTPUT, 3.3V, GND provide essential pins for operating this monitor with an Arduino or other development board. Also provided on this board are RA (Right Arm), LA (Left Arm), and RL (Right Leg) pins to attach and use your own custom sensors. Additionally, there is an LED indicator light that will pulsate to the rhythm of a heart beat. 

Note: This product is NOT a industry grade medical device and is not intended to be used as such or as an accessory to such nor diagnose or treat any conditions.

Features of AD8232 ECG Monitor Sensor Module:-

• Operating Voltage - 3.3V
  
• Analog Output
  
• Leads-Off Detection
  
• Shutdown Pin
  
• LED Indicator
  
• 3.5mm Jack for Biomedical Pad Connection or Use 3 pin header

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

The Digital Sensor TTP223B Module Capacitive Touch Switch is based on a touch-sensing IC (TTP223B) capacitive touch switch module. In the normal state, the module output low, low power consumption; When a finger touches the corresponding position, the module output high, if not touched for 12 seconds, switch to low-power mode. Jog type the initial state is low , high touch , do not touch is low ( similar touch of a button feature ) Module can be installed in such as surface plastic, glass of non-metallic materials.

In addition to the thin paper ( non-metallic ) covering the surface of the module , as long as the correct location of the touch , you can make hidden in the walls, desktops and other parts of buttons.

• Control Interface A total of three pins (GND, VCC, SIG), GND to ground, VCC is the power supply, SIG digital signal output pin
• Power Indicator Green LED, power on the right that is shiny
• Touch area Similar to a fingerprint icon inside the area, you can touch the trigger finger.
• Positioning holes 4 M2 screws positioning hole diameter is 2.2mm, the positioning of the module is easy to install, to achieve inter-module combination.

• 1 xDigital Sensor TTP223B Module Capacitive Touch Switch

• Low power consumption
• Can replace the traditional touch of a button
• Four M2 screws positioning holes for easy installation

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.

The module sends eight square wave pulses and automatically detects whether it receives the returning signal. If there is a signal returning, a high level pulse is sent on the echo pin. The length of this pulse is the time it took the signal from first triggering to the return echo.

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.

MPU9250 9-Axis Attitude Gyro Accelerator Magnetometer Sensor Module features the MPU-9250, which is a multi-chip module (MCM) consisting of two dies integrated into a single QFN package. One die houses the 3-Axis  accelerometer and gyroscope. The other die houses the AK8963 3-Axis magnetometer. Hence, the MPU-9250 is a 9-axis Motion Tracking device that combines a 3-axis accelerometer, gyroscope and magnetometer, and a Digital Motion Processor (DMP). It is based on I2C Address, Address: 0x68 by default, 0x69 if AD0 is pulled high.

The MPU-9250 also features an embedded temperature sensor. This module includes pull-up resistors on the SDA, SCL, and nCS lines, pull-down resistors on the FSYNC and AD0 lines, and an onboard 3.3V voltage regulator allowing you to power the module from 5V sources such as an Arduino. If you desire to power the module from 3.3V you can bridge the solder jumper next to the voltage regulator to bypass the regulator.

1. FPV, RC, and Robots systems

2. GPS navigation systems

3. Impact recognition and logging

4. Gaming and virtual reality input devices

5. Motion-activated functions

6. Intelligent power saving for handheld devices

7. Vibration monitoring and compensation

8. Free-fall detection

1. Acceleration, Gyroscope, and Magnetometer

2. 9 DOF module

3. Build-in ultra-low noise linear LDO voltage regulator.

4. Built-in onboard filters, which reduce noise from the motor and other high current electronics.

5. All sensors are connected to the I2C bus.

6. Build-in the Logic level converter for I2C.

7. Power indicator LED.

8. Using Immersion Gold PCB, machine welding process to ensure quality.

9. On-board pull-up resistors on SDA, SCL, and nCS

10. On-board pull-down resistors on FSYNC and AD0

1 x MPU9250 9-Axis Attitude Gyro Accelerator Magnetometer Sensor Module

1 x Jumper Header(Unsoldered).

BH1750 module is a digital ambient light sensor, IIC I2C communication. Good for arduino light detection. It is a  light intensity sensor breakout board with a 16 bit AD converter built-in which can directly output a digital signal, there is no need for complicated calculations. This is a more acurate and easier to use version of the simple LDR which only outputs a voltage that needs to be calculated in order to obtain meaningful data. With the BH1750 Light Sensor intensity can be directly measured by the luxmeter, without needing to make calculations. The data which is output by this sensor is directly output in Lux (Lx). When objects which are lighted in homogeneous get the 1 lx luminous flux in one square meter ,their light intensity is 1lx. Sometimes to take good advantage of the illuminant, you can add a reflector to the illuminant.So that there will be more luminous flux in some directions and it can increase the ilumination of the target surface.

Features:-

• Digital Light intensity detection module: GY-30 Chip : BH1750FVI
• Power supply: 3V-5V power
• Light range 0-65535 lx
• Sensor built-in : 16 bitAD converter
• Direct digital output, bypassing the complex calculation, bypassing the calibration
• Don't distinguish between ambient light
• Close to the spectral characteristics of visual acuity
• widely use to 1-lux high precision measurement
• Standard NXP I2C communication agreement
• Low Current by power down function * 50Hz / 60Hz Light noise reject-function
• Light source dependency is little. ( ex. Incandescent Lamp. Fluorescent Lamp. Halogen Lamp. White LED. Sun Light)
• Small measurement variation ( /- 20%).

• Fitness and sports heart rate monitoring
• Portable ECG
• Remote health monitor
• Game peripheral equipment
• Bioelectricity signal collection

• AD8232 adopts double poles high-pass filter to eliminate the motion artifacts and electrode half cell potential
• AD8232 adopts an operational amplifier that is without using constraint to build a three pole low pass filter, eliminating extra noises

Additional Information:

• Pay Mode Terms: T/T (Bank Transfer)

MC38 Wired Door Window Sensor 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.

• Easy to install
• Strong concealment
• Magnetic sensor alarm, control the switch of the circuit via the built-in magnet
• Alarm when someone intrudes into your places
• Can be used in places like apartment, hotel, office, etc.
• Ideal for residential or commercial use.
• Designed to do embedded in the door or window frame.

• Normally closed: When the magnet together, the circuit is conductive( light on ); when the magnet separate, the circuit is not conductive ( light off ). 
• For example: Install on the door, close door light on. open door light off.

This is a very easy to use low cost semiconductor Gas sensor Module with analog and digital output. This module uses MQ5 gas sensor as a gas sensing element. It requires no external components just plug in Vcc & ground pins and you are ready to go.

For Digital output the threshold value can be easily set by an on-board potentiometer.  Using this module you can easily interface MQ5  gas Sensor to any Microcontroller, Arduino or even Raspberry Pi.

This Gas Sensor module is sensitive to LPG, natural Gas & Town Gas. it is also small sensitivity to alcohol & smoke.

Specification of MQ5 GAS Sensor Module:-

• Power Supply: 5 Volts
• Interface Type: Analog & Digital
• High Sensitivity to LPG, natural Gas, Town Gas & small sensitivity to smoke & alcohol
• Low Cost.
• Stable & Long Life.
• On board Power indication.

5mm Two-color LED module for Arduino emits red and green light. You can adjust the amount of each color using PWM. Products are widely used in many areas, electronic dictionary, PDA, MP3, headphones, digital cameras, VCD, DVD, car audio, communication, computer, charger, power amplifier, instrumentation, gifts, electronic toys, mobile phones and so on.

1. Diameter:5mm
2. Package-Type: Diffusion
3. Color: Red +Green
4. Luminosity Intensity (MCD)

1 x 5mm Two-Color LED Module

• 12-bit resolution
• I2C Interface (Standard, Fast, and High-Speed supported)
• Small package
• 2.7V to 5.5V supply
• Internal EEPROM to store settings
• Mounting hole diameter: 2.5mm
• Distance between mounting hole: 11.5mm

Vibration sensor module SW-420 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.

• Do not reverse the power directions, otherwise, it is possible to burn the chip.
• Signal LED light is output Low, signal LED OFF output is High.
• The output level close to the input voltage.

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.

1 x Vibration sensor module SW-420.

DHT11 is a Humidity and Temperature Sensor, which generates calibrated digital output. DHT11 can be interface with any microcontroller like Arduino, Raspberry Pi, etc. and get instantaneous results. DHT11 is a low cost humidity and temperature sensor which provides high reliability and long term stability.

It uses a capacitive humidity sensor and a thermistor to measure the surrounding air, and outputs a digital signal on the data pin (no analog input pins needed). Its very simple to use, and libraries and sample codes are available for Arduino and Raspberry Pi. 

This module makes is easy to connect the DHT11 sensor to an Arduino or microcontroller as includes the pull up resistor required to use the sensor. Only three connections are required to be made to use the sensor - Vcc, Gnd and Output. 

It has high reliability and excellent long-term stability, thanks to the exclusive digital signal acquisition technique and temperature & humidity sensing technology.

Unlike the Active Buzzer, which generates a fixed tone when the power is connected, the passive needs a generated tone, as a loudspeaker does, to make it operate. This buzzer is almost identical in appearance to the Active Buzzer.

Either PWM or simply switching a digital pin on then off,  the frequency being determined by the length of the delay between switching on and off.

650nm 6mm 5V DC 5mW Mini Laser Dot Diode Module which is made of copper plastic. It is suitable for 3V 5mW standard, with 6mm outside diameter, can

be used to connect diode tubes for multiple uses.

Features:- 

1. Output Power: 5mW
2. Working Voltage: 5V DC
3. Working temperature: -10 ???~???40 ???
4. Housing material: Copper
5. Working life: more than 2000 hours
6. Spot mode: Dot Facula (continuous output)
7. Laser wavelength: 650nm red-colored.
8. Operating current: <40mA
9. Power lead length: 120mm.

ACS712 Current Sensor Module - 20A can sense upto 20A of current flow. Sensing and controlling the current flow is a fundamental requirement in wide variety of applications, which includes over-current protection circuits, battery chargers, switching mode power supplies, digital watt meters, programmable current sources, etc.

ACS712 Current Sensor Module - 20A is based on ACS712 sensor, which can accurately detect AC or DC current. The maximum AC or DC that can be detected can reach 20A, and the present current signal can be read via analog I / O port of a microcontroller or an Arduino.

Specifications:-

Supply Voltage: 4.5V ~ 5.5V DC

Measure Current Range: -20A ~ 20A

Sensitivity: 100mV/A

TheHMC5883Lutilizes Honeywell's Anisotropic Magnetoresistive (AMR) technology that provides advantages over other magnetic sensor technologies. These anisotropic, directional sensors feature precision in-axis sensitivity and linearity.

These sensors solid-state construction with very low cross-axis sensitivity is designed to measure both the direction and the magnitude of Earths magnetic fields, from milli-gauss to 8 gausses. Honeywells Magnetic Sensors are among the most sensitive and reliable low-field sensors in the industry.

Note:

Sometimes markings on these boards vary slightly (e.g. Some may be labeled HW-127 instead of GY-273 even though they are otherwise identical).

1. Auto and personal navigation.
2. UAV systems.
3. Robotic navigation.
4. Location-based services (LBS).

1. 1-2 degree heading accuracy.
2. A range of -8 to +8 Gauss.
3. Communication: IIC communication protocol.

1 xGY-273 HMC5883L 3 Axis Module Magnetic Field Sensor.

• The use of imported groove coupler sensor
• The output status indicator lamp output high, output low lights.
• Block, output high; no shelter, output low. The comparator output signal clean, good waveform, driving ability. 
• The output format: digital switching output (0 and 1) Fixed bolt holes for easy installation Small plates Using a wide voltage comparator LM393

Additional Information:

• Pay Mode Terms: T/T (Bank Transfer)

Tons of updated lessons and Arduino codes are available on google and youtube for free. It is extremely easy for Arduino fancier to control and use these modules. This kit will help you control the physical world with sensors.

• For beginners who are interested in Arduino
• A complete set of Arduinos most common and useful electronic components
• Infrared sensor receiving module
• Laser sensor module
• Temperature and humidity sensor module
• Infrared sensor module
• Obstacle avoidance sensor module.

Additional Information:

• Production Capacity: EX STOCK
• Delivery Time: EX STOCK
• Packaging Details: PLASTIC BOX