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!
I used this sensor for detecting when the motor is stopped.useful video
3 года назад
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: ruclips.net/video/72CGYTzAX0E/видео.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.
7 лет назад+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)
I'm a Forth guy too. How much effort is required to get Forth running on an Arduino?
Check out this video. ruclips.net/video/n7l4Wn6xalc/видео.html
I leant something new today. Excellent.
is the more gears the more accurate the rpm measurement using the hall effect sensor?
I used this sensor for detecting when the motor is stopped.useful video
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:
ruclips.net/video/72CGYTzAX0E/видео.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.
Blood has iron, can is detect people?
Super useful circut thanks a lot :)
can i use a3144 instead oh49e?
The circuit was designed for linear hall effect sensors. You can get the same circuit in automotive sensors. ruclips.net/video/_-_XGLkKnCs/видео.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 u please make a inductive proximity sensor
ruclips.net/video/mUXGGudV01g/видео.html
posible only 1 hall sensor?
Yes .. you can build it with one hall sensor.
Ok 1 challenge is how to detect stainless/steel needle? 🤔
WHATS THE NUMBER OF HALL SENSOR
Check the schematic at 2:53
Ultra cheap metal detector