[SOLVED] Plz help ! Reed switch fails within a few operations

[j37prakash]

I need to design a circuit to switch on a warning lamp or sound a hooter when a door is opened and the reed switch is activated by the magnet. I have herewith attached the circuit diagram of the test setup. My problem is that the reed switch fails within a few (3 or 4) operations though the current measured is in very small units.
Kindly advise me how to go about it to solve the problem.

 

[betwixt]

The current threough the reed switch will be well over 100mA and will almost certainly also have a surge current as it closes. This will probably be tens if not hundreds of times greater than the reed switch capacity.

I would suggest you use a Triac to switch the current and use the reed to fire the Triac.

Brian.

 

[j37prakash]

Thanks Betwixt for your valuable advice. I'll put in a triac as you suggested