How to hook up a 12vdc single coil latching relay

[[email protected]]

I ordered these single coil latching relays and didn't get a schematic
with them and.... I'm lost as to how to hook them up. Any info would be
appreciated... whitefoots

 

[Rich Webb]

I ordered these single coil latching relays and didn't get a schematic
with them and.... I'm lost as to how to hook them up. Any info would be
appreciated... whitefoots

Driving the coil with opposite polarities either sets or resets the
latch. One hopes that you have the appropriate drive current, voltage,
and snubber settings.

Manufacturers frequently make data sheets available through their web
pages. Looking up the part number on that Google thing might be
effective.

 

[Peter Bennett]

I ordered these single coil latching relays and didn't get a schematic
with them and.... I'm lost as to how to hook them up. Any info would be
appreciated... whitefoots

Does the relay have a manufacturer and part number? - if so, look on
for the manufacturer's web site, and find the datasheet.

--
Peter Bennett, VE7CEI
peterbb4 (at) interchange.ubc.ca
new newsgroup users info : http://vancouver-webpages.com/nnq
GPS and NMEA info: http://vancouver-webpages.com/peter
Vancouver Power Squadron: http://vancouver.powersquadron.ca

 

[Chris]

I ordered these single coil latching relays and didn't get a schematic
with them and.... I'm lost as to how to hook them up. Any info would be
appreciated... whitefoots

Hi, Whitefoots. If you've got a double-pole, double-throw center-off
switch, here's the absolute easiest way (view in fixed font or M$
Notepad):

|
| o---.
| .--o--__ |
| | o---)-.
| | | | |
| | .-)-o
| +| | | | |
| --- | | C|
| - | | | C|
| | | | C|
| | | | | |
| | | | |
| | | o-' '-o
| '--o--__ |
| o-----'
|
|
(created by AACircuit v1.28.6 beta 04/19/05 www.tech-chat.de)

When the switch is in the center position (off), no voltage is applied
to either side of the coil. It doesn't do anything.

When the switch is in the down position, the + side of the voltage
source is applied to the top side of the coil, and the - of the voltage
source is applied to the bottom side of the coil. That will set the
relay.

When the switch is in the up position, the voltage is applied in
reverse -- + to the bottom and - to the top. That will reset the
relay.

You can do the same thing as the switch with other relays, or with
transistors. Note that having both sides of the coil at the same
potential is electrically the same as having power disconnected.

Hope this is of help. If you describe a little more about what you're
doing and how you plan to drive the relay, possibly you might get a
more specific answer.

Good luck
Chris

 

[jasen]

I ordered these single coil latching relays and didn't get a schematic
with them and.... I'm lost as to how to hook them up. Any info would be
appreciated... whitefoots

you need some sort of reversing switch or H-bridge so similar setup that's
able to drive the coil in both directions,
one way turns the relay on the other turns it off.

Here are two ways you couild do it using ordinary switches
ascii-art: use a fixed-pitch font (eg:courier):
windows users paste into notepad.
google groupies select "view original" under options.


push-button latchin relay drive

.---------------------------.
| "on" "off" |
----------+--o _____ o--'
_-o---[~-_]---o-_
----------+--o-~ ~~~~~ ~-o--.
| relay coil |
| |
`---------------------------'

here it's done with two momentary SPDT switches
(you could use microswitches)



switch follower latching relay drive

+ ----o +||
_-0----||------------...---------------------.
- --+-0-~ || 1000uF |
| long wires |
| _____ |
`-------------------------...--------------[~-_]--'
~~~~~
relay coil

here it's done using a capacitor and an ordinary spdt switch
you could use a small battery for a power source,
it'd last years.