A sensor is a device that detects and responds to some type of input from the physical environment. The specific input could be light, heat, motion, moisture, pressure, or any one of a great number of other environmental phenomena.
This portion of the circuit is not necessary for the color sensor, but it makes experimentation easier because you can see the detection results without an oscilloscope or volt meter. R6: A 1 megohm resistor feeds back a tiny amount of the output from the op amp to provide comparison hysteresis.
The BEAM Circuits Collection is a BEAM Reference Library site.. Field (electric, capacitance) sensors Teaching your 'bot to play the field
This basic light sensor circuit is of a relay output light activated switch. A potential divider circuit is formed between the photoresistor, LDR and the resistor R1.When no light is present ie in darkness, the resistance of the LDR is very high in the Megaohms (MΩ) range so zero base bias is applied to the transistor TR1 and the relay is de-energised or “OFF”.
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In electrical engineering, current sensing is any one of several techniques used to measure electric current. The measurement of current ranges from picoamps to tens of thousands of amperes. The selection of a current sensing method depends on requirements such as magnitude, accuracy...
Simple LDR Circuit : Make a light activated switch using single transistor. Rain Alarm : We get a tone when wire is in contact with water so this circuit can also work for tank overflow indicator. Heat Sensor : Simple, but sensitive Circuit for indication of temperature using thermistor.
Contains built-in amplification and temperature compensation circuit. Circuit design and adjustment. High-level precision and high reliability realized. Overall accuracy is ±1.25% FS (Standard type) Overall accuracy is ±4% FS (Economy type) Overall accuracy is ±2.5% FS (Low pressure type) Compact pressure sensor unit that saves space.
A current sensor circuit is a circuit that can sense current going through it. If the current reaches a certain threshold, then an indicator, such as an LED, will turn on. This is not an ammeter circuit, where we know or are measuring the amount of current going through. That's a different thing entirely.