Questions tagged [sensor]
Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.
3,323 questions
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How does this three pin fuel level sensor work?
A kerosene burner stove that I am attempting to repair shows a "no fuel" error on the screen, although there is fuel in the tank.
The fuel level sensor is attached to the pump. Here are two ...
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What is this strain gauge-looking sensor?
This sensor is from a toothed wheel used for RPM acquisition.
The sensor device has GND, Vin, Signal 1 and Signal 2. Signal 2 is offset about 90° from Signal 1 and is inverted.
The output seems to ...
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Temperature Sensor System without using a prebuilt MCU
I have a course project where we need to design and build a system to measure the temperature of water in a geyser. One constraint is that we are not allowed to use microcontrollers or development ...
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SGX-4OX Sensor PCB Mounting
To avoid problems during soldering of the SGX-4OX gas sensor, I'm looking for a pad or connector to mount the sensor onto the PCB. What kind of design would you recommend for this type of sensor?
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Is ±0.001° phase resolution at 120 Hz achievable with a DIY 24-bit ADC setup?
I need to measure the phase shift between two 120 Hz signals from magnetic pickup coils. I am aiming for ±0.001° precision with 2s averaging.
I have experience with basic Op-amp circuits, but I am ...
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Power station Tallpower v2400 MPPT board repair [closed]
I need to know the part number of the HALL1 current sensor of this device's MPPT board.
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Troubleshooting an LC oscillator
I'm making an inductive loop sensor, relying on amplitude changes.
I've made various LC oscillators, none worked. Now, I've copied the topology given by the answer to one of my questions here, which ...
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Current sensor worst case output voltage calculation
I am trying to calculate the worst case output voltage of a current sensor, without considering the temperature drift of the parameters. The sensor datasheet mentions offset voltage, ratiometric error ...
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ADXL345 FIFO behavior when empty?
The ADXL345 doesn't seem to specify the behavior of the device if you put it in FIFO mode and then read the DATAX/Y/Z when the FIFO is empty. What I mean by 'empty' is that the depth of the FIFO has ...
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How to monitor the health of a relay and its contacts
I have a challenge and hope someone has and idea how to solve it.
I want to monitor the health of a relay by monitoring the state of relay contacts in relation with the state of the coil. I want to ...
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Testing BG51 Geiger Radiation Sensor in Lab Without Radioactive Source – Pulse Verification
I am working on integrating a BG51 Geiger radiation sensor into a battery-powered embedded system (MCU-based).
The sensor provides a TTL pulse output where each pulse corresponds to a detected ...
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Soil moisture sensor problems
I'm trying to build a simple capacitive soil moisture sensor, but my sensitivity is very low.
D3 is a 3V 50% PWM signal with ~500kHz.
A0 is connected to an Atmega328p.
The wire between R4 and the ...
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I2C bus problems when using two distance sensors in Arduino
I have built a prototype to measure two distances using two time of fligth (TOF) sensors based on VL53L0X IC (from this manufacturer) which are connected to an Arduino board. Due to the environment ...
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Trouble Measuring Current with CT-215B 3:100 Sensor — Need Pinout/Connection Info
I’m trying to measure the current of a circuit that draws around 1.5 A (AC) using a current sensor model CT-215B, 3:100. However, I haven’t been successful because I can’t find clear information about ...
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ADC closer to sensor or MCU if they are connected via longer cable in noisy environment and differential signal?
I am designing a system where I have several daughter boards with voltage or current sensors (several or one on each board).
One board is the master with the MCU.
Because the system is larger and in a ...
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