Latched on/off output with single pulse

Hi to all,

I have been trying to build the latched on / off output relay system with a single momentary pulse, (located on this site), and cannot get it to switch off. The power supply I am using is a 12 volt dc bench unit. I have tried to switch a LED, a 12v 55watt lamp, and a SPDT relay as I thought the load may influence the result. All wiring has been checked against the circuit diagram, all the wiring continuity has been checked, with no fault found. I have tried both the 5 relay (no diodes), and the 4 relay (diode) versions. Same result with both. Negative pulse switches on, but I must kill the 12v+ supply to turn it off.

Have I missed something? has anyone else built this and got it working?

Regards,

Trev01.

As I was typing the help note, I had a new thought . Checking the relay operations, I discovered 1 relay had a subtle difference. Yep, one is not a SPDT relay. Has the two output pins, but they are linked internally.

Oh well, red face and all, I can now get it to work.

Trev01 .    

really? i have never seen a relay that toggles like that, the only ones i see require the polarity to be reversed to toggle

xetmes, these are PCB mounted relays. Each time you energize the coil, the contacts will either stay closed or stay open, similar to the action of a ball point pen with each click of the button on top. I had a local supplier for these some time ago and I only have one of these relays left. As soon as I find another supplier for them, I'll share it with everyone. Here's another topic using this relay: https://www.the12volt.com/installbay/forum_posts.asp?tid=10506 

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