Pushbutton circuit help ?

[tron87]

Been scratching my head trying to figure out how to put the following circuit idea into practice with no luck.Basically i got a push to make pushbutton now when its held in the pressed position i want it to activate a relay when its released like a dead mans switch in a train ?

 

[ljcox]

This circuit may not be exactly what you want, but it may give you some inspiration.

 

[mbarazeen]

use a normally closed push button to wire a relay. when its pushed the contacts are open, when it released the push button comes to normal position making the path for the relay.

 

[tron87]

Want it to do is:
To start turn the circuit on
1.button not pressed nothing happens
2.button pressed and held and in that position (nothing happens) until it is released like a dead mans switch

Any more ideas ?

 

[ljcox]

The circuit that I posted at post #2 will do what you want.

Relay A operates when you the press the button.

Relay B operates when you release the button.

Now both relays are operated.

So relay B is the "dead man" function.

To release them, you simply have to press and release the button again.

 

[mbarazeen]

you need only one relay, one push button and one reset button to do it.
see the attached diagram, hope you will understand it.