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Results tagged with sensor
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user 187471
Sensors convert a physical quantity (e.g. temperature, pressure) into an electrical signal.
24
votes
Why does it take time for electronic scale to measure?
The balance usually has four load cells at four corners, each of which connects to a HX711 weight sensor with a sort of Wheatstone bridge measuring voltage. … The HX711 sensor itself is 24 bit accurate, and only takes 0.1 second to do the analog to digital conversion. …
- 2,956
-2
votes
What kind of sensor can sense Infrared radiation from any direction?
References
(1) PIR Motion Sensor Module
(2) PIR (motion) sensor product sheet US$10 - AdaFruit
(3) PIR (motion) sensor tutorial - AdaFruit
(4) Fresnel lens - Wikipedia
(5) Rpi3 LIRC Library and UART IR …
- 2,956
0
votes
Inappropriate readings of pulse and temperature sensor (LM35)
LM35 shouldn't give such an ridiculously inaccurate reading. The spec below shows how precise (+- 0.5°C) it is!
Perhaps your calculation is dodgy! :)
Let me check your calculation. Suppose yo …
- 2,956
1
vote
220VAC to 12VDC Capacitive Dropper Power Supply Driving Relay Problem
Question
How come my capacitive dropper is not working?
Answer
Update 2020oct13hkt0914
The OP seems using a relay switch without any flyback diode. The back EMF from the inductive coil of the relay …
- 2,956
7
votes
How can I use a 2N2222 transistor as a temperature sensor?
Question
How can I use a 2N2222 transistor as a temperature sensor? … Actually my calibration plan is to use the DS18B20 temperature sensor to replace my cheapy home use thermometer. …
- 2,956
9
votes
Sensor to distinguish between different types of pegs on a pegboard
Linear Hall Effect Sensor Datasheet - Honeywell
(11) Allegro A3144 Datasheet
(12) TCS230 TCS3200 Color recognition module Color sensor module - US$4.6
(13) MCP3008/MCP3208 10/12 bit ADC Testing and Programming … - EESE, tlfong01
Appendices
Appendix A - Pressor Sensor Spec
HALJIA 5Pcs BX120-3AA High Precision Resistance Strain Gage Strain Gauge GAGE Full Bridge Used for Pressure Weighing Sensor
Price: £6.99 …
- 2,956
3
votes
Capacitive moisture sensor not quite working
What I have researched so far
(1) I started by a preliminary inspection of the three moisture sensors to get a overall picture of capacitive sensor, and why and how it is different from resistive sensor … F - Calibrating the Capacitive Sensor
Now I am calibrating my capacitive moisture sensor. …
- 2,956
1
vote
Reflective optical sensor
Question
How come it is so hard to calibrate the TCRT5000 IR reflective sensor? … References
(1) TCRT5000 IR Reflective Sensor Module - AliExpress US$1
(2) Op-am Comparator - Electronics Tutorials
(3) TCRT5000 IR Reflective Optical Sensor Module (approx 1″ detection range) - ProtoSupplies …
- 2,956
7
votes
What are the two sensors doing in the automatic bread production line?
Sensor 1
Sensor 1 blinks Green when no bread in sight. Blinks Yellow as soon as bread comes up. So I guess it is a bread detector. … Sensor 2
In the same video, Sensor 2 is not blinking at all. I think, similar to Sensor 1 above, reflection get interrupted means bread (in this case, another tray of bread arrives. …
- 2,956