latching relay?

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angelars

Copper - Posts: 176

Joined: November 06, 2006

Location: United States

Posted: July 06, 2008 at 5:48 PM / IP Logged

Basically what we need to do is simple, just turn a radio on/off with a single 12+ pulse. The first 12 volt + pulse from the 12 volt source will turn a radio on. Touch the same contact with the next 12 volt + pulse from the same 12 volt + wire and it will turn the radio off. They show on this site where you can do it with 4 relays and two diodes (see" Latched On/Off Output Using a Single Momentary Pulse") but someone was telling me that a standard latching relay would do the same thing and save us using a lot of parts. Is this true? As I understand it a latching relay gets triggered by a positive and/or negative impulse, and we need to use the same 12 volt + impulse each time. Would a latching relay work for us?

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Big Dog

Gold - Posts: 1,265

This member consistently provides reliable information

Joined: May 02, 2002

Location: Quebec, Canada

Posted: July 09, 2008 at 3:32 PM / IP Logged

No. Latching relays either use seperate inputs for setting then re-setting or they use a single coil but inverse the polarity.

I've never heard of a latching relay that sets with a pos pulse then resets with a pos pulse on the same wire.

You can use a PAC TR7 (feature 3)

See the install guide here: TR7

Prepare your future. It wasn't the lack of stones that killed the stone age.

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angelars

Copper - Posts: 176

Joined: November 06, 2006

Location: United States

Posted: July 09, 2008 at 4:58 PM / IP Logged

THANK YOU Big Dog! I'll look into that part.

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latching relay?

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