Digital LDR Module

The Digital LDR 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 signal detection can be adjusted using the potentiometer.

Use it to detect the light brightness in your environment and decide to switch OFF or ON light? Or maybe to adjust the brightness of the LED of your house?

You can adjust the threshold (sensitivity) of the digital output by tuning the onboard variable resistor (potentiometer). Simple usage as it is the digital output, so you will know is the light present and decide what to do with it.

It comes with an M3 mounting hole for ease of attaching it to an object. Onboard, it provides an LDR, high sensitivity and commonly being used for light detection. The module comes with a power LED and a status LED as an indicator.

LDR Module Photosensitive resistor module most sensitive to environmental light intensity is generally used to detect the ambient brightness and light intensity.

How it works

1. 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;
2. Digital output D0 directly connected to the MCU, and detect high or low TTL, thereby detecting ambient light intensity changes;
3. Digital output module DO  can directly drive the relay module, which can be composed of a photoelectric switch.

Pin details

VCC ↔ 3.3V to 5V DC.
GND ↔ Ground.
DO ↔ Digital Output.

Features :

1. LM393 based design.
2. It can detect ambient brightness and light intensity.
3. Adjustable sensitivity (via blue digital potentiometer adjustment).
4. Output Digital – 0V to 5V, Adjustable trigger level from preset.
5. LEDs indicating output and power.

Package Includes :

1 x LDR Module.

If you are searching for a Gas sensor module with a very High detection range compared to any ordinary gas sensor then this MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module will fulfill your specification demands. The MQ-2 Gas sensor detector module has a detection range of 300-10000 ppm. The gas sensor modules are always well known for their robust and simple construction and measures toxic gases in very low concentrations.

The MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module is useful for gas leakage detection (home and industry). It is suitable for detecting H2, LPG, CH4, CO, Alcohol, Smoke, or Propane. Due to its high sensitivity and fast response time, measurements can be taken as soon as possible. The sensitivity of the sensor can be adjusted by the potentiometer.

MQ-2 gas sensor using gas sensitive material is to be clean air in the lower conductivity of stannic Oxide or tin oxide (SnO2). When the sensor when flammable gases are present in the environment in which the conductivity of the sensor with an increasing concentration of combustible gas in the air increases.

Use a simple circuit to convert the changes in conductivity and output signal that corresponds to the concentration of the gas.

MQ-2 gas sensor higher sensitivity to liquefied petroleum gas, propane, hydrogen, detection of gas, and other combustible vapors are ideal. This sensor can detect a variety of flammable gas, is a low-cost sensor for many applications.

Following conditions must be avoided

Water Condensation
Indoor conditions, slight water condensation will affect sensors’ performance lightly. However, if water condensation on sensors surface and keep a certain period, sensor’ sensitivity will be decreased.

Used in high gas concentration
No matter the sensor is electrified or not if a long time is placed in high gas concentration it will affect the sensor’s characteristics.

Longtime storage
The sensor’s resistance produces reversible drift if it’s stored for a long time without electrifying, this drift is related to storage conditions. Sensors should be stored in airproof without silicone gel bag with clean air. For the sensors with long time storage but no electrify, they need a long aging time for stability before using.

Longtime exposed to an adverse environment
No matter the sensors are electrified or not, if exposed to an adverse environment for a long time, such as high humidity, high temperature, or high pollution, etc, it will affect the performance of the sensor badly.

Vibration
Continual vibration will result in sensors’ down-lead response then rapture. In transportation or assembling lines, a pneumatic screwdriver/ultrasonic welding machine can lead to this vibration.

Concussion
If sensors meet strong concussion, it may lead its lead wire disconnected.

Explore more Gas Sensors click the link Gas Sensor

Application:

1. The domestic gas leakage detector
2. Industrial Combustible gas detector
3. Portable gas detector

Features :

1. Good sensitivity to Combustible gas in a wide range
2. High sensitivity to LPG, Propane, and Hydrogen
3. Long life and low cost
4. Simple drive circuit
5. Can be used as a digital or analog sensor
6. The Sensitivity of the Digital pin can be varied using the potentiometer
7. Can be used to Measure or detect LPG, Alcohol, Propane, Hydrogen, CO, and even methane

Package Includes :

1 x MQ-2 Smoke LPG Butane Hydrogen Gas Sensor Detector Module

Infrared Obstacle Avoidance IR Sensor Module (Active Low) has a pair of infrared transmitting and receiving tubes. When the transmitted light waves are reflected back, the reflected IR waves will be received by the receiver tube. The onboard comparator circuitry does the processing and the green indicator LED comes to life.

The module features a 3 wire interface with Vcc, GND, and an OUTPUT pin on its tail. It works fine with 3.3 to 5V levels. Upon hindrance/reflectance, the output pin gives out a digital signal (a low-level signal). The onboard preset helps to fine-tune the range of operation, the effective distance range is 2cm to 30cm.

Features:

1. Easy to assemble and use
2. Onboard detection indication
3. The effective distance range of 2cm to 30cm
4. A preset knob to fine-tune distance range
5. If there is an obstacle, the indicator lights on the circuit board.

Package Includes :

1 x Infrared Obstacle Avoidance IR Sensor Module (Active Low)

Heart Rate data can be used in many Electronic design and microcontroller projects. But the heart rate data is difficult to read, however, the Pulse Sensor Amped help us to read heart rate. The Heart Beat Pulse Sensor Amped is a plug-and-play heart-rate sensor for Arduino.

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 Amped works with either a 3V or 5V Arduino.

Pulse Sensor Arduino Hookup

Connect the sensor’s power supply pins to the Arduino board supply pin as Red – 5V, Black – GND and Purple – A0 (analog input 0) its over. This Analog input reading can be displayed in the serial terminal of Arduino IDE or it can be drawn as the pulse by using Processing IDE.

Features :

1. A Color-Coded Cable, with a standard male header connectors. Plug it straight into an Arduino or a Breadboard. No soldering is required.
2. The Pulse Sensor has 3 holes around the outside edge which make it easy to sew it into almost anything.
3. Visualization software (made in Processing) to instantly see the output of the sensor and for troubleshooting.

Package Includes :

1 x Heart Beat Pulse Sensor

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 bot3dprint.com 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.

Circuit Diagram of PIR Sensor With Arduino:

 Features :

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).

Package Includes :

This is TCRT 5000 Dual Channel Line Tracking sensor module.

This IR reflective sensor Module used TCRT5000 IR Sensor to detect color and distance. This sensor module consists of 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 Robots 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.

Application :

1. Meter pulse data sampling
2. Fax paper shredders detection
3. Obstacle detection
4. Black and white line detection

Features :

1. Designed with the reflected infrared sensor, indicator light.
2. Built in a potentiometer for sensitivity control.
3. On-board LM393 voltage comparator chip and infrared sensing probe TCRT5000L
4. Onboard signal output instructions, the output is the highly effective signal at the same time, the indicator lamp light output signal can be directly and single-chip microcomputer IO connection & middot
5. Signal detection sensitivity can adjust
6. Reserve all the way more circuits (P3 voltage drawn)
7. Using the TCRT5000 infrared reflection sensor
8. Output form: digital switch output (0 and 1)
9. A fixed bolt hole, convenient installation.

Package Includes :