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Help? Latching relays

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bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Help? Latching relays

I 'need' a specific type of relay, but my lack of knowledge is making it difficult for me to find what I want.

According to wikipedia, I need a two coil latching relay. When current flows one way, it makes, and when it flows the other way, it breaks. In between, it retains its state.

Closest I've got so far is this one:
http://www.mellorautoelectrical.co.uk/Rela...oduct.html
but I don't think it's what I need. I think it makes and breaks on current pulses, irrespective of direction, which is no good for what I have in mind.

5th Jun 2010 4:29 pm

kernowexpeditionaryforce

Member Since: 15 Jan 2009
Location: Kernow
Posts: 329

2006 Discovery 3 TDV6 S Auto Buckingham Blue

what do u need it for m8?

5th Jun 2010 5:14 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Ooh, about 10A I'd say.

5th Jun 2010 5:50 pm

blue meanie
D3 Decade

Member Since: 04 Aug 2005
Location: Newbury
Posts: 6861

2006 Discovery 3 TDV6 SE Manual Cairns Blue

Rob, not exactly what you describe but I have bought relay delay modules and other bits from these lot:

http://www.quasarelectronics.com/index.html

they have a huge range of pre-assembled kits and modules, there might be something they do that might fit what you are after? and theeeeennn......???

5th Jun 2010 6:09 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Cheers Malc, will take a look

5th Jun 2010 6:45 pm

kernowexpeditionaryforce

Member Since: 15 Jan 2009
Location: Kernow
Posts: 329

hi m8 - sorry i meant what application do u need it for, need it to operate etc?

5th Jun 2010 7:41 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

I know

I was being annoying and subversive... If it works I'll tell you.

5th Jun 2010 8:27 pm

Spooky

Member Since: 02 Jun 2009
Location: Swindon, Wilts
Posts: 1013

Vehicle Wiring Products do a Latching Relay, but I'm not sure that'll do the job either.

What circuitry are you trying to build??? Regards,
Mick

- 2014 SDV8 Autobiography

- '~~Vincent~~' - ~~2010 TdV8 Vogue SE~~

- ~~'Molly'~~ - 2005 HSE Auto
'Dixie' - ~~2000 D2 Td5 ES~~

5th Jun 2010 9:01 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Already seen the one on VWP, but I think it will switch on any pulse, not dependent on the direction of the pulse.

As I've already hinted, the ultimate project is top secret, but I'll give you a clue:

5th Jun 2010 11:32 pm

NoDo$h

Member Since: 02 May 2006
Location: Finding new and exciting ways to milk badgers.
Posts: 19689

Having been involved in some of the early R&D that has inspired Rob's project (I had some early involvement in one of the failed early manual versions - there were shards of plastic all over the place), I can assure you guys it'll be fookin' awesome when it's done

I know it's not considered "kind" to say no these days, but no. Just no, ok? And if it's not ok, still no.

6th Jun 2010 10:19 am

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

I've found another way to do it. Components are readily available. It's just a bit less 'neat'

6th Jun 2010 12:34 pm

Trackman

Member Since: 16 Apr 2010
Location: Glasgow
Posts: 430

2016 Discovery 4 3.0 SDV6 Landmark LE Auto Waitomo Grey

This what you are looking for ?

http://uk.rs-online.com/web/search/searchB...um=0350377

6th Jun 2010 10:45 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Almost exactly... OK, exactly exactly. But since I'm tight, I'm going to do it with two Â£1.50 relays instead of one Â£20 one. Thanks for your help

7th Jun 2010 1:00 am

zig

Member Since: 09 Sep 2005
Location: Scotland
Posts: 619

2006 Discovery 3 TDV6 SE Auto Bonatti Grey

Does the relay have to remember which state it is in when the vehicle's ignition is turned off?

7th Jun 2010 12:39 pm

bobbycrispbox

Member Since: 15 May 2006
Location: Where women glow and men plunder
Posts: 2580

Ignition circuit doesn't come into it. As for remembering state between battery disconnects, it's not really that important.

7th Jun 2010 2:09 pm

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