I have been using reed switches on my model railway to operate the signals via Mosfet bistable circuits and also to simulate conductor rail arc flashes directly coupled to White LEDs. When operating, the system has worked well, but I have had to replace several reed switches that have failed, either permanently closed or permanently open circuit. I have now ordered some (100) Hall effect sensors to replace the reeds, and will carry out some testing first before installation, as I may have to change the voltage regulators in the power supplies. I also have to make sure that I do not exceed the maximum current rating of the sensors, but your demonstration #1 with the single LED gives me hope.
@tsbrownie
Жыл бұрын
Interesting application. Most hall effect switches operate in the milliamp range, like 25 to 30. You may have to couple them with a transistor/mosfet or similar to get more amp throughput. I just got some surface mount (tiny) bipolar transistors with 600 mA capability. That could bump it up by a factor of 15x-20x. Note that in the demo where I light up the LED, the green LED is being powered by the RPi, and not the hall effect switch directly. There's a small indicator LED on the hall effect board that is being powered directly, but it came with the switch and I have no idea how much power it is drawing (it might be very little depending on the board circuitry).
@uvwuvw-ol3fg
Жыл бұрын
They are also rarely used as a current sensors but information about that kind of application is obscure.
@deanhenthorn1890
11 ай бұрын
I replaced my key operated garage door opener with a Reed Switch hidden behind the siding. When I pass a magnet near it, the switch closes and signals the controller on the circuit board of the garage door opener. No more lock and key switch that goes bad due to rain and dirt clogging up the tumbler assembly. You can’t tell where’s the reed switch is hidden at. I’m not buying a whole new system or a new key tumbler.
@tsbrownie
11 ай бұрын
Very smart. I like it!
@ke6bnl
4 жыл бұрын
just working on one for my electric door step on my truck. Step company want $26 for the magnet and reed switch found it at Allied Electronics for about $3.50 but had to pay shipping. As a little kid about 60 years ago a neighbor of ours came over and had a handful of reed switch and I thought he said he or his company had come up with these switches and showed them to me and gave me a handful to play with.
@tsbrownie
4 жыл бұрын
I'm pretty sure places that sell home alarms have them all packaged, then there's the big online store named after a jungle / river.
@teddycheung9552
3 жыл бұрын
thank you ,very useful clip,more about reel switch, please
@tsbrownie
3 жыл бұрын
What more would you like to know?
@teddycheung9552
3 жыл бұрын
@@tsbrowniemay be the use of it in other board
@tsbrownie
3 жыл бұрын
@@teddycheung9552 OK, I will look for those applications. Thank you.
@Gatsbi
2 жыл бұрын
This was in the base charging station of robotic vacuum. I couldn’t figure out what it could be used for. 12v dc adapter goes to the charging station. First I thought it was a fuse and blown since it wasn’t changing. But finding out it is a reed. Any idea what function it serves?
@tsbrownie
2 жыл бұрын
Maybe it tells the base that the robot is in place?
@Gatsbi
2 жыл бұрын
@@tsbrownie i see That could be. But I check the bottom of robot where it makes contact as well as charging station metal contact that pushed in when robot seats There seems to be no magnet anywhere to activate the reed and not sure how it activates. I guess I’ll look again tomorrow.
@Gatsbi
2 жыл бұрын
Actually I found the magnet on the bottom of the robot so it make sense now.
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