Relay with function generator

Hello everyone! I've got a problem. I have to make a circuit (on paper looks just like that on link), but it doesn't work. The generator doesn't activate the relay, do you know maybe what should i change?

link to circuit: https://www.circuitlab.com/circuit/3737ed/circ1/

Thanks for answers, Mikeyy.

by Mikeyy
May 18, 2013

Two questions: 1. Do you have enough drive (voltage and current) for the relay? 2. Can your relay operate at 500 Hz?

by gdoland
May 18, 2013

Sorry, but I have no idea how to check it. Acually it operates on 60 Hz, I forgot to change it in that circuit (after changing to 60, it doesn't work either)

by Mikeyy
May 18, 2013

Your problem is that you have placed a voltmeter, VM1, instead of a voltage source.

There is nothing in your circuit to produce a voltage (or a current) in R1, R2 & L1, irrespective of whether the relay is activated or onot. Hence you have no way to detect - in your circuit - if the realy contacts are open or closed.

Replace VM1 with a 1V DC source then either run your DC sweep or run a Time Domain simulation.

If you ground the left hand end of R2 then you will also get more meaningful voltage measurements. At present you are measuring what in a real circuit is an isolated, floating voltage.

:)

by signality
May 20, 2013

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