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Old 29-07-2016, 11:04 AM   #31
Maverich
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Hi All
I just joined the forum yesterday, but I know a bit about electronics and sell online.

I'm running N gauge and wouldnt be able to fit a relay into a coach I don't think. A possible solution would be to use a Reed Switch and then use a microcontroller like an ATTiny and program it up to switch an output from high to low to high each time it passes the magnet. I guess that could be done on a very small footprint.
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Old 29-07-2016, 11:33 AM   #32
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Quote:
Originally Posted by Flashbang View Post
Sorry, just noted you're meaning Latching Reed switches operated by a magnet. Not latching relays! Ignore my ramblings on Latching relays!

Yes and as stated, reversing the magnetic pole causes the latching reed switch to either latch or unlatch
Confusion reigns (and not for the first time ). I know all about single and dual latching relays - I use several on my layout atm.
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Old 29-07-2016, 11:56 AM   #33
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What is confusing is the topics heading of Latching Reed Relays.. The ones you're referencing are not relays, just switches.
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Old 29-07-2016, 12:24 PM   #34
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What is confusing is the topics heading of Latching Reed Relays.. The ones you're referencing are not relays, just switches.
Exactly. Can we agree to call reed switches, switches. And relays, relays. Simples
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Old 29-07-2016, 01:13 PM   #35
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The topic heading can easily be changed if that is what's wanted.
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Old 29-07-2016, 06:43 PM   #36
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The topic heading can easily be changed if that is what's wanted.
I have altered it to 'Switch' now.
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Old 29-07-2016, 07:33 PM   #37
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Quote:
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I have altered it to 'Switch' now.

The illustration on page 421 of the May 2016 issue of Railway Modeller uses the phrase 'Latching reed relay', but uses the term 'switch' in the body text. These switches were sold in the USA by Rapido as 'easy peasy', but are now permanently out of stock.
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Old 12-03-2018, 02:05 PM   #38
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I know this is an old thread but as the OP's question remained unanswered ie where can you buy these latching (also known as bistable or bi-stable) reed switches, I thought I would provide an update for anyone else contemplating such a project.

I bought a coach lighting kit at the East Anglian Model Railway Exhibition yesterday to try it out and the kit contains such a switch. As I already have a supply of the leds, battery holders etc I thought I would have another look into the reed switch availability. They do seem to be difficult to find in the UK (Layouts4U has it in their price list but not currently available as a separate item).

The component number is MEDER KSK-1E85-BV470 and is available from a European Company called TME whose web site is HERE. They are not particularly cheap costing 3 ea incl vat for quantities between 5 and 24; post is extra. Their current stock level is 380.
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