Introduction to Reed Switches, Magnets & Magnetic Fields

This brief introductory video offers design tips for electronic engineers designing with reed switches. Dr. Stephen Day, Ph.D. offers a brief overview on reed switches with a detailed explanation as to how they react to magnetic fields. Also covered is how to select a magnet for your particular application.

[@cliffpip7932]

This is how UA-cam videos should be. Straight to the point. No, "Hey what's up guys, let me waffle on for 5 mins before we start".

[@tensor131]

I'm a DIYer aiming to use RS for the first time (lighting cupboards etc.). This explanation is crystal clear and has answered all my questions - THANK YOU. It has also educated me in how they are in use everywhere, which I find fascinating!! Hoping to dabble with electronics as a hobby, in the future, and this presentation has given me loads of ideas.

[@philr4665]

Excellent, thank you. I am exploring reed switches on a project where I previously used non-magnetic mechanical mechanisms which proved very ambiguous in raising events.

[@blackbear92201]

Awesome explanation - thanks for posting!

[@TomySpatz]

So many thanks Stephen !

[@captlynhall]

Thanks so much. Great and easy to understand explanation.

[@yssing]

Very informative video! Thank you very much.

[@trondknudsen6689]

Thank you! Nice and clear. I like the example with insightful tips on magnets. I have subscribed to this channel based on this video, hoping to find more good info and examples of applications of reed switches and other components.

[@eishuu858]

Thanks! Very detailed!

[@shadyengineer1988]

Thanks for this amazing video. It helped me a lot

[@StephieBarber]

Amazing video, very well explained - cheers

[@TronSAHeroXYZ]

Cool you can detect water levels with it using floater and magnet. Good to know.

[@2008dio]

now i understand thanks very informative.

[@tejasvisharma9763]

Why are there 2 positions where it turns the switch on when the bar is moved vertically.? According to field lines, when it is on the left side, the switch should not close.

[@analajaji]

Great video, thank you. What kind of magnets are normally used in large bore (50+mm) air cylinders? And what reed switches are suitable to use with such cylinders?

[@pelpspark]

Very useful

[@abdullahalahmadi695]

Can you explain the ones that work with elevators sensing the level and courting the floors

[@tensor131]

I meant to ask ... is it ok to encase these in epoxy resin? They look awfully delicate and I already know that the glass entry points are very weak.

[@user-yb4dc4kc7f]

helpful！thanks

[@namtranhoai5208]

Thank you very much for your explanation. I have a question relating to the reed swith in the flowmeter of a dishwasher machine. Two contacts of the reed switch are open normally (i.e. outside of magnetic field). In the flowmeter component, the magnetic element attached to the propeller and it rotates (instead of sliding in vertical or horizontal directions) as the water runs through. Is the reed switch closed as the magnetic element rotates? Or does it keep closing and opening intermittently (i.e close - open - close - open..., to create a electronic pulse)?