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
- posted
17 years ago
How to hook up a 12vdc single coil latching relay
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- posted
17 years ago
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.
-- Rich Webb Norfolk, VA
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- posted
17 years ago
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
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- posted
17 years ago
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
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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
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- posted
17 years ago
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.
-- Bye. Jasen