This video will describe how to build your own proximity sensor using linear Hall effect sensors. This sensor will detect ferrous targets and output a digital signal that can be sent to a microcontroller for processing.
Howdy! Came across you video a week or so back and have watched it a few times. Love the simplicity of the project. My problem is I am trying to build something similiar, but need it to detect a ferous object 3 ft to 6 feet away. How would I megasize this to work. Thanks!
Great Content! Can this circuit also build up with an NE 5532P (or one of these OPAmps i have: LM324N, LM339N, ULN2003AN, ULN2803APG, LM358P, LM386, LM393, NE555P, UA741CN, JRC4558D, PC817). I am new in electronics so i hope this question is not too silly ;-)
Any general purpose op-amp will work. The NE-5532P will work. Build the circuit and experiment with different magnets as shown in this video: th-cam.com/video/72CGYTzAX0E/w-d-xo.html
A comparator would be a better choice. They are designed to be used in open loop configuration, fast switching, and rail to rail output. I used an op amp because most people will have one available in their parts bin. If a comparator is available like a LM311 that would be a better part to use. Just remember the output is open collector.
6 ปีที่แล้ว +2
0033mer thanks for the detailed answer. Op amps are still magical to me, but I suspected a comparator would do. What I found most difficult to understand is why a particular op amp was chosen for a given circuit, as most authors do not elaborate on the subject.
As usual, the first word you start your video with is "OK..." ... Great video
Howdy! Came across you video a week or so back and have watched it a few times. Love the simplicity of the project. My problem is I am trying to build something similiar, but need it to detect a ferous object 3 ft to 6 feet away. How would I megasize this to work.
Thanks!
That could be a challenge. Try looking into GPR (Ground Penetrating Radar)
Ultra cheap metal detector
I'm a Forth guy too. How much effort is required to get Forth running on an Arduino?
Check out this video. th-cam.com/video/n7l4Wn6xalc/w-d-xo.html
What is the smallest-size ferrous object that can be detected with this setup?
For example, could a stainless steel (ferrous) needle be detected?
No ..That would be too small to detect.
I leant something new today. Excellent.
is the more gears the more accurate the rpm measurement using the hall effect sensor?
Super useful circut thanks a lot :)
Great Content! Can this circuit also build up with an NE 5532P (or one of these OPAmps i have: LM324N, LM339N, ULN2003AN, ULN2803APG, LM358P, LM386, LM393, NE555P, UA741CN, JRC4558D, PC817). I am new in electronics so i hope this question is not too silly ;-)
Any general purpose op-amp will work. The NE-5532P will work. Build the circuit and experiment with different magnets as shown in this video:
th-cam.com/video/72CGYTzAX0E/w-d-xo.html
Ok 1 challenge is how to detect stainless/steel needle? 🤔
Blood has iron, can is detect people?
I used this sensor for detecting when the motor is stopped.useful video
can u please make a inductive proximity sensor
th-cam.com/video/mUXGGudV01g/w-d-xo.html
Why an op amp instead of a comparator?
A comparator would be a better choice. They are designed to be used in open loop configuration, fast switching, and rail to rail output. I used an op amp because most people will have one available in their parts bin. If a comparator is available like a LM311 that would be a better part to use. Just remember the output is open collector.
0033mer thanks for the detailed answer. Op amps are still magical to me, but I suspected a comparator would do. What I found most difficult to understand is why a particular op amp was chosen for a given circuit, as most authors do not elaborate on the subject.
Álvaro M. Valdebenito B. Yes , I was wondering that too. That deserves a video.
can i use a3144 instead oh49e?
The circuit was designed for linear hall effect sensors. You can get the same circuit in automotive sensors. th-cam.com/video/_-_XGLkKnCs/w-d-xo.html
WHATS THE NUMBER OF HALL SENSOR
Check the schematic at 2:53
posible only 1 hall sensor?
Yes .. you can build it with one hall sensor.