Questions tagged [proximity-sensor]
A proximity sensor detects the presence of another object without physical contact. There are many different kinds, examples include capacitive, inductive and others using various wavelengths including ultrasonic, visible and non-visible light and RF.
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Proximity sensor (3 Wire NPN or PNP) to RS-232
I do have 2 proximity sensors (level sensors) with 3 wire design. They offer to be PNP or NPN and I need to implement them into an RS-232. They are supplied by 24 VDC. Is there somewhat like a ...
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Distance sensor types with sample rates >= 1 kHz and certain characteristics
I made a project a while ago, it was about making a device that can measure the time it takes for an athlete to run between two points. It consisted of two stations, both of which were based on ESP32-...
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Four-wire photoelectric sensor load wiring [closed]
I’m a woodworker and a DIY’er and I have been trying to hook up a Banner QS18VPSD sensor 4 wire with a strobe light to my central dust collection. I found a YouTube video that explains it all.
I can ...
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MTCH1010 internal pull up resistor draw more current than Icc?
I'm designing a Ultra-low power clock and I want to use a touch sensor for indicate the time since I want to reduce the power draw from the LED display.
I found the MTCH1010 from microchip. Based on ...
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555 Timer Delay on Trigger
I am trying to build a circuit which will have an IR sensor. The type of IR sensor is active high. I need to connect the output of the IR sensor to a circuit which will give low output when the sensor ...
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Time delay circuit to reverse the rotation of DC motor when input is high
I am trying to design a circuit to use to control a DC motor according to the output of a capacitive proximity detector.
The circuit should turn ON the DC motor in forward direction when the hand ...
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Why does the air gap between the electrode and the overlay of a capacitive sensor have a negative impact on the touch performance?
I see in the design guidelines that the airgaps between the electrodes and the overlay of the capacitive sensor have detrimental effect on the performance of the touch sensor and they should be filled ...
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Using the PLC output to mimic a NPN sensor as the input to a device
I got a device which has a connection to a NPN proximity sensor, it'll do something when the sensor is being trigged.
Now I remove the sensor, using a PLC(24vdc) to do the job of sending the signal to ...
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Looking for datasheet of Toshiba T2742 integrated circuit [closed]
I'm looking for datasheet for Toshiba T2742 Integrated circuit. IC is used in old car with tachometer sensor, probably as AFE (Analog Front End). Tachometer sensor is a inductance proximity sensor, ...
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Building a ferrous metal detector [closed]
I'm planning to build a ferrous metal proximity sensor to use as part of a robotics project. During my research, I found a very helpful youtube video (linked here) that shows how to do so for a Hall ...
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Range problems w/ Sharp IR Distance Sensor
I've been struggling to properly measure distances with a Sharp IR Distance Sensor GP2Y0A21.
Despite the sensor being rated for distances of 10-80 cm, I've found that after about 30-33cm, the sensor ...
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Help in understanding poor temperature stability of an induction proximity sensor circuit
I have been experimenting with a circuit for an induction proximity sensor, that was reverse engineered in the following post:
Help with reverse engineering a small PCB
I have built the circuit, but ...
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What could cause a 5V UART bus to have 1.2V as its logic HIGH?
I'm working with an RSSV013010W0101-U1930 proximity sensor and an Arduino Nano, and I've run into a recurring error that I have a few hunches on, but can't quite figure out.
The device is meant to ...
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Need theoretical understanding of basis of IR sensor design
Below is a cutout of the IR sensor part from a heart rate sensor schematic. I need to understand how this part has been designed, what is the basis of the choice of the two resistor values R1 and R2, ...
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Inductive proximity sensors: size vs. sensitivity
My target is a 20mm long, stainless steel, socket head, M3 screw with head facing the sensor. How will sensor sensitivity, i.e. maximum sensing distance, change with different sensor size? I'm looking ...
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