Latching Relay

220

04:40:21

This could be used to control an alarm from a remote location.  For example a panic button.  Once it has been initiated the switch can be forcibly and completely removed from the circuit and the relay is still latched driving the alarm.  The only way to shut off the alarm is to press the other button, which would also be an ideally a remote location.

published 6 years ago

hurz

6 years ago

Yes, take another cup of strong coffee ! It wrong from logic wiring and wrong from electric point of view. A series circuit of relay and bulb need a buld low in resistance 30mW bulb are P=U²/R ! Anyway check this http://everycircuit.com/circuit/6376626769362944

Grimmy

6 years ago

Ah crap. I can't believe I missed that. I feel about nine kinds of dumb right now. Yeah. Time for that cup of coffee.

hurz

6 years ago

One more thing to make such relay simulations easier, check the simspeed while 1ms/s everything is 1000 times slower then in real, while relay circuits can mostly work with 1s/s

Grimmy

6 years ago

This is actually a little brother of a circuit I wired up years ago for a jail panic button. The light was an alarm and the release switch was in the control room. The N.O. switches were remote panic buttons placed in each jail cell.

hurz

6 years ago

This is for home use for your kids? 😁

Grimmy

6 years ago

My kids are long grown and gone. Hell, i have a grandson about to go to Penn State. (Proud!) 😊

hurz

6 years ago

👍

rich11292000

6 years ago

So you put the relay coil in series with the load, and control devices sinking the contacts. Where did you learn this? Do you have educational documentation for this method?

hurz

6 years ago

Right, thats like selfmodifying assembler code, but it can work.

Grimmy

6 years ago

I'm self taught. I started out repairing radios and then televisions. Then video tape players. Then when computers came around, i got work repairing those. Then when they got so small that my hands couldn't fit into them, and everything was replace-not-repair, i swing around to the front and started coding. I worked primarily in the communications industry, but did a brief stint working on military projects. I retired in 2000 after laying Y2K to rest. Now, i just play around with electronics, trying to remember some of the bits I've forgotten.

hurz

6 years ago

You are welcome!

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