Hemal Electronics

DHT22 capacitive humidity sensing digital temperature and humidity module is one that contains the compound has been calibrated digital signal output of the temperature and humidity sensors. Application of a dedicated digital modules collection technology and the temperature and humidity sensing technology, to ensure that the product has high reliability and excellent long-term stability.

The sensor includes a capacitive sensor wet components and a high-precision temperature measurement devices, and connected with a high-performance 8-bit microcontroller. The product has excellent quality, fast response, strong anti-jamming capability, and high cost.

Standard single-bus interface, system integration quick and easy. Small size, low power consumption, signal transmission distance up to 20 meters, making it the best choice of all kinds of applications and even the most demanding applications.

DHT22 has higher precision and can replace the expensive imported SHT10 temperature and humidity sensor.

It can measure the environment temperature and humidity to meet the high demand.The product has high reliability and good stability.If it's used and combined with special sensor Arduino expansion board,it will be easily implemented the interactive effect which related to the temperature and humidity perception.

Caution: DHT22 digital temperature and humidity sensor is designed for analog sensor interfaces. The analog port will be used as the digital which will not occupy the original digital port of the Arduino.The lines of the sensor which can transform the analog function to digital that can be use on digital port.

This is PAM8403 Mini 5V Digital Amplifier Board With Switch Potentiometer. PAM8403 is a small digital amplifier chip, high-definition sound quality highlights the advantages of digital chips, the circuit using the most reasonable peripheral configuration, power supply filtering is upgraded to 470uf (some sellers are less did not even 100uf capacitance).

1.6mm glass sheet, the real amplifier board did the most detailed, high-fidelity sound output 3W + 3W, is a rare good product enthusiasts amplifier, potentiometer using the original anti-meter body, potentiometer with the switch can cut off the power supply directly counterclockwise.

Features:-

• PCB size is about: length 30mm width 22mm overall height after installed is about 16mm
• Built with switch Potentiometer, can adjust the volume & control power switch freely!
• Flexible assembly usage.

LM35D Analog Temperature Sensor Module is based on the LM35 temperature sensor. The LM35 Linear Temperature Sensor module is useful in detecting ambient air temperature. Sensitivity is 10mV per degree Celsius. The output voltage is proportional to the temperature.

LM35 is a precision IC temperature sensor with its output proportional to the temperature (in °C). The sensor circuitry is sealed and therefore it is not subjected to oxidation and other processes. With LM35, the temperature can be measured more accurately than with a thermistor!!!

It also possesses the low self-heating and does not cause more than 0.1 °C temperature rise in still air. The operating temperature range is from -55°C to 150°C. The output voltage varies by 10mV in response to every °C rise/fall in ambient temperature, i.e., its scale factor is 0.01V/°C.

It is commonly used as a temperature measurement sensors. It includes thermocouples, platinum resistance, thermal resistance and temperature semiconductor chips, which commonly used in high-temperature measurement thermocouples. The LM35D linear temperature sensor and sensor-specific expansion of Arduino board, in combination, can be very easy to achieve.

Wiring Instructions of LM35D Analog Temperature Sensor Module :-

• “+”: Positive power supply
• “–“: Negative one
• “out”: pick AD converter module analog signal input terminal or directly connected to the multimeter to measure

Specifications & Features of LM35D Analog Temperature Sensor Module :-

• Based on the semiconductor LM35 temperature sensor
• Useful in detecting ambient air temperature
• Calibrated directly in ° Celsius (Centigrade)
• Linear + 10 mV/°C Scale Factor
• 0.5°C Ensure accuracy (at +25°C)
• Low power consumption, less than 60uA
• Low output impedance, 1mA current through only 0.1Ω
• With screw holes for easy installation and fixed. Aperture 2.6mm

* Product Images are shown for illustrative purposes only and may differ from actual product.

• Product Code: EC-3184
• Availability: 94

• Rs.114.00 
• (Excluding 18% GST)
• Wholesale Pricing

  Select	Quantity	Discount	Price per piece
  	1 - 9	0%	114.0000
  	10 - 24	2%	Rs.112.00
  	25 - 49	4%	Rs.109.00
  	50 - 99	7%	Rs.106.00
  	100+	10%	Rs.103.00

The LDR Sensor Module is used to detect the presence of light / measuring the intensity of light. The output of the module goes high in the presence of light and it becomes low in the absence of light. The sensitivity of the signal detection can be adjusted using potentiometer.

Features:-

• Can detect ambient brightness and light intensity
• Adjustable sensitivity (via blue digital potentiometer adjustment)
• Operating voltage 3.3V-5V
• Output Type

• With fixed bolt hole for easy installation
• Small board PCB size: 3cm * 1.6cm
• Power indicator (red) and the digital switch output indicator (green)
• Using LM393 comparator chip, stable

Pin outs:-

• External 3.3V-5V VCC
• External GND GND
• DO digital output interface, a small plate (0 and 1)
• AO small board analog output interface

How to use:-

• Photosensitive resistor module most sensitive to environmental light intensity is generally used to detect the ambient brightness and light intensity.
• Module light conditions or light intensity reach the set threshold, DO port output high, when the external ambient light intensity exceeds a set threshold, the module D0 output low;
• Digital output D0 directly connected to the MCU, and detect high or low TTL, thereby detecting ambient light intensity changes;
• Digital output module DO  can directly drive the relay module, which can be composed of a photoelectric switch;
• Analog output module AO and AD modules can be connected through the AD converter, you can get a more accurate light intensity value

Connect the Powerline (middle) to +5V and ground (-) to GND. Connectsignal (s) to any digital pin on the Arduino.

• Digital Output Hall-effect sensor.
• Operating voltage: typically 5V.
• Output Current: 25mA.
• It can be used to detect both the poles of a magnet.
• The output voltage is equal to the operating voltage.
• Operating temperature: -40C to 85C.
• Turn on and Turn off time is 2 sec each.
• Inbuilt reverse polarity protection.
• Suitable for Automotive and Industrial Applications.

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.

Specifications:-

• Power Supply¿¿¿ 3.3~5.5V DC
• Output¿¿¿ 4 pin single row
• Measurement Range¿¿¿ Humidity 20-90%RH¿¿¿ Temperature 0~50¿¿¿
• Accuracy¿¿¿ Humidity +-5%RH¿¿¿ Temperature +-2¿¿¿
• Resolution¿¿¿ Humidity 1%RH¿¿¿ Temperature 1¿¿¿
• Interchangeability¿¿¿ Fully Interchangeable
• Long-Term Stability¿¿¿ <±1%RH/year

Pin Description:-

• Pin 1:     Power +Ve (3.3VDC to 5.5VDC Max wrt. GND)
• Pin 2:     Serial Data Output
• Pin 3:     Power Ground or Power –Ve

The user can configure the digital output to be PWM. As a standard, the 10-bit PWM is configured to continuously transmit the measured temperature in the range of -20 to 120 C, with an output resolution of 0.14 C.

Application:

1. High precision non-contact temperature measurements
2. Thermal Comfort sensor for Mobile Air Conditioning control system
3. The temperature sensing element for residential, commercial and industrial building air conditioning Windshield defogging
4. The automotive blind angle detection
5. Industrial temperature control of moving parts
6. Temperature control in printers and copiers
7. Home appliances with temperature control
8. Healthcare
9. Livestock monitoring
10. Movement detection
11. Multiple zone temperature control up to 127 sensors can be read via common 2 wires
12. Thermal relay/alert
13. Body temperature measurement

1. Works from 3.3V to 5V input, Module has power regulator IC built-in.
2. Standard I2C interface with built 2xpull upresistors
3. When measuring the temperature, please maintain a measuring distance of 1 cm
4. Small size, low cost
5. Easy to integrate
6. Factory calibrated in a wide temperature range: -40 to 125 C for sensor temperature and -70 to 380 C for object temperature.
7. High accuracy of 0.5C over the wide temperature range (0..+50 C for both Ta and To)
8. Medical accuracy of 0.1C in a limited temperature range available on request
9. The measurement resolution of 0.01C
10. SMBus compatible digital interface for fast temperature readings and building sensor networks
11. Customizable PWM output for continuous reading
12. Simple adaptation for 8 to 16V applications

1 x MLX90614-ESF GY-906 Non-Contact Human Body Infrared Temperature Measurement Module

Additional Information:

• Delivery Time: DEPAND ON AVILABLITY

SD Card Reader Writer Module for Arduino with the onboard 3.3V regulator. It is easily interfaced as a peripheral to your Arduino, and other embedded boards and microcontrollers. Through programming, you can read and write to the SD card over SPI interface.

Specifications and Features of SD Card Reader Writer Module :-

• SD Card module can make your SD application easier and simple.
• It easily interfaces as a peripheral to your Arduino sensor shield module.
• Through programming, you can read and write to the SD card using your Arduino.
• Can use for SD Card more easily, such as for MP3 Player, MCU/ARM system control.
• All SD SPI pins output, MOSI, SCK, MISO, and CS.
• Support 5V/3.3V input.
• Size:4.7  x 3.1 cm.
• LED indicator.
• SD Card Holder.
• Onboard 3.3V regulator (AMS1117-3.3) for +5v to 3.3V generation. 3.3V is also available as output.

• seamlessly Switch between the temperature modes (between cool and heat).
• Temperature is controlled by setting the temperature value and the difference value.
• manual temperature calibration is available.
• Refrigerating control output delay protection is built-in.
• An alarm outputs a warning sound when the temperature exceeds temperature limit or when the sensor outputs error.

• Temperature measuring range: -50 – 99°C.
• Resolution : 0.1°C.
• Accuracy : ±1°C (-50 – 70°C).
• Sensor error delay: 1 minute.
• Power supply: 220VAC±10%, 50/60Hz
• .Power consumption: ≤3W.
• Sensor: NTC sensor (1PC).
• Relay contact capacity : Cool 10A/250VAC;Heat 10A/250VAC.
• Ambient temperature : 0 – 60°C.
• Storage temperature : -30 – 75°C.
• Relative humidity : 20% – 85% (No condensate).
• Front panel size : 75(L) x 34.5(W)(mm)
• Mounting size: 71(L) x 29(W)mm.
• sensor length: 1m (include the probe).
• Product size75(L) x 34.5(W) x 85(D)mm.

• 1 x 220V Mini Digital Temperature Controller.
• 1 x Temperature sensor probe with cable.
• 1 x Instruction Manual.

A reed switch is a sensor that closes circuit in the presence of a magnetic field. Reed sensors can be used in many application where contact less On/Off is required. However reed switches can be fragile to use directly, hence this module can make it easier to handle and mount the sensor in various applications.

It is a kind of passive electronic switching component with contacts with a simple structure, small size and easy to control. It consists of a sealed glass envelope where there are two ferrous elastic reeds and is filled with inert gas called rhodium.

It gets operated by the applied magnetic field. When the device is exposed to a magnetic field, the two ferrous materials inside the switch pull together and the switch closes. When the magnetic field is removed, the reeds separate and the switch opens.

Features:-

• Open reed switch
• Working voltage: 3.3V ~ 5V
• Current: Upto 1.2A
• Comparator output, clean signal, great waveform, and strong driving ability
• Digital switch output (0 and 1)
• Fixed bolt hole for easy installation

The Raindrops Detection sensor module is used for rain detection. It is also for measuring rainfall intensity. Rain sensor can be used for all kinds of weather monitoring and translated into output signals and AO.
It has a power indicator LED and an adjustable sensitivity though a potentiometer.

The module is based on the LM393 op amp. It includes a printed circuit board(control board) that “collects” the rain drops. As rain drops are collected on the circuit board, they create paths of parallel resistance that are measured via the op amp. The lower the resistance (or the more water), the lower the voltage output.Conversely, the less water, the greater the output voltage on the analog pin. A completely dry board for example will cause the module to output five volts.

Specifications :

Operating voltage: 5V
Provide both digital and analog output
Adjustable sensitivity
Output LED indicator
Compatible with Arduino
TTL Compatible
Bolt holes for easy installation

• Pulse Sensor is a low cost, very small size a plug-and-play heart rate sensor for Arduino and Arduino compatible boards. It can be used by students, artists, athletes, makers, and game & mobile developers who want to easily incorporate live heart-rate data into their projects.

  Pulse Sensor Amped adds amplification and noise cancellation circuitry to the hardware. It's noticeably faster and easier to get reliable pulse readings. Pulse Sensor works with either a 3V or 5V Arduino. 

  A Color-Coded Cable, with a standard male header connectors. Plug it straight into an Arduino or a Breadboard. No soldering is required.An Ear Clip, perfectly sized to the sensor. It can be hot-glued or epoxied to the back of the sensor to get reading from an ear lobe.Parts to make a handy Velcro finger strap. This is another great way to get heart-rate data.

  * Product Images are shown for illustrative purposes only and may differ from actual product.

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).

This tiny Flame sensor infrared receiver module ignition source detection module is Arduino compatible can use to detect flame or wavelength of the light source within 760nm~1100nm also useful for Lighter flame detect at the distance 80cm.

Greater the flame, farther the test distance. It has the Detect angle of 60 and very sensitive to flame spectrum.

It produces the one channel output signal at the D0 terminal for further processing like an alarm system or any switching system. The sensitivity is adjustable with the help of blue potentiometer given on the board.

1. Indicator light: a green one for the switch, a red one for power.
2. Built in a potentiometer for sensitivity control.
3. Onboard signal output indication, output effective signal is high, at the same time the indicator light up, the output signal can directly connect to microcontroller IO.
4. Can detect fire or wavelength in 760 ~ 1100 nm nano within the scope of the light source.
5. Detection angle about 60 degrees, the flame spectrum especially sensitive.
6. The flame of the most sensitive sensors flame, the regular light is also a response, generally used for fire alarm purposes.

1 x Flame sensor infrared receiver module ignition source detection module

he LASER MODULE 650NM 5V head is composed of a light-emitting tube, condenser lens, and adjustable copper sleeve and it is assembled when delivered, the focal length of the lens is adjusted glued by strong glue stick, which can work directly after connecting to a 5V DC power supply.

Laser Diode Module is a breadboard friendly, low cost having a wavelength of 650nm, and operating voltage of 5V. The laser head is composed of a light-emitting tube, condenser lens, and adjustable copper sleeve and it is assembled when delivered, the focal length of the lens is adjusted glued by strong glue stick, which can work directly after connecting to a 5v dc power supply.

Note: Pay attention to the laser cell to prevent from being burnt or battery explosion due to a short circuit when removing the battery.

Need Help For Help For Laser Module.

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

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).

* Product Images are shown for illustrative purposes only and may differ from actual product.