Sensors #2475528

Soil Moisture Sensor is used to control the soil moisture, content for plants. The circuit of soil moisture control unit described here helps the people to look after their garden in their absence. When the soil is dry, this electronic circuit automatically switches on a pump motor and waters the plants. Thus, plants are protected from getting dry. Conducting rods are inserted into the soil. The electrical conductivity of the soil is directly proportional to the water present in it. This phenomenon makes this unit to switch on or off automatically according to the moisture content in it.

About the Circuit :

• The circuit uses two timer ICs acting as multivibrators and one inverter IC. Out of the two probes, one is connected to ground and other is connected to the input pin1 of IC1 through R2. When soil is dry, resistance between the probes is very high. Hence input voltage at pin1 is high. This electrical signal gets inverted at pin2. As voltage at trigger pin2 of IC2 is below 1/3Vcc, IC2 gets triggered and gives logic high at output pin3. IC2 drives IC3, which is wired as an astable multivibrator. The output from IC3 turns transistor T1 on and thus it drives the relay.
• When soil is wet, the output of IC1 at pin2 is high. As the voltage at trigger pin2 of IC2 is greater than 1/3Vcc, it does not get trigger. The output from IC3 makes T1 off and in turn relay becomes off. LED D2 gives the visual indication of on/off motor. LED D1 is used to indicate the output status of IC1.
• Calibration :  The level of moisture content, at which the motor becomes on, can be set by preset P1.

Proximity Sensor is ideal for detecting the obstacle in robot surrounding by means of no-contact proximity detection.Proximity Sensor is used to detect objects and obstacles in front of sensor. Sensor keeps transmitting modulated infrared light and when any object comes near, it is detected by the TSOP sensor by monitoring the reflected light from the object.

Specifications :

• High sensitivity TSOP sensor for object detection
• Onboard visual indicator (LED)
• Sensitivity adjustment through the potentiometer
• Output HIGH duration can be adjusted up to 3 seconds
• Compaq design and easily mountable
• Simple 3 PIN header interface
• Digital output

Package Contents :

• Proximity Sensor
• 3 pin connecting wire

Application :

• Obstacle Avoiding Robot
• Hand Following Robot
• Automatic Door Opening System
• Parking Assist System
• Contact less Tachometer
• Security System

Line Sensor is specially designed to distinguish between black and white surface and ideal for line following robot applications. Line Sensor provides ‘HIGH’ output whenever it detects the white surface and ‘LOW’ output whenever it detects the black surface. The detection range of Line Sensor lies between 10mm to 50mm.

Specifications :

• High sensitivity IR receiver.
• Onboard visual indicator (LED).
• Sensitivity adjustment through the potentiometer.
• Compact design and easily mountable.
• Simple 3 PIN header interface.
• Digital output.
• Package Contents
• Line Sensor.

Applications :

• Black Line Following Robot.
• White Line Following Robot.
• Stair Case Detecting Robot.

Bump Sensor is used as a robust limit switch for detection. Bump Sensor has a high digital output (Active high). It has a simple 3 PIN header interface which make it more compaq and easily mountable. Devices Electrotechnica/ Elektrokit is engaged in manufacturing and supplying such Bump Sensor. The entire range of Bump Sensor is appreciated and demanded for its smooth working, excellent efficiency, and durability.

Product Specifications :

• Robust limit switch for detection.
• Onboard visual indicator (LED).
• Digital output (Active high).
• Compaq design and easily mountable.
• Simple 3 PIN header interface.

Devices Electrotechnica/ Elektrokit is engaged in manufacturing and supplying of educational electronic kits in India since last 20 years. Sound Sensor is used as a high sensitivity condenser microphone for sensing. Sound Sensor has a digital high output (active high). Since it has a compact design, it can be easily mountable. The output for Sound Sensor has a high duration and can be adjusted up to 3 seconds.

Product Specifications :

• Onboard visual indicator (LED)
• Digital output (Active high)
• Output HIGH duration can be adjusted up to 3 seconds
• Compaq design and easily mountable
•  Simple 3 PIN header interface.