How about useing a D Flip Flop.  Connect the microswitch to the clock=20
input and feed the Qnot output to the "D" input.  Connect your relay=20
driver transistor to the Q output.

John Waters wrote:

> Hi All,
>
> I need to turn ON or OFF a small 12V d.c. motor using a micro-switch,=20
> but the requirement is, the micro-switch must be operating like a=20
> toggle switch, i.e. when the micro-switch is pushed (and released=20
> immediately) once, the motor will be turned ON, it will remain ON and=20
> will only be turned OFF when the micro-switch is pushed (and released)=20
> again.
>
> I know a micro-switch alone will not be able to do this, I may need=20
> some relays or other components working together to achieve this, but=20
> I don't want complicated circuits that require a stable power supply,=20
> I just want to use some simple passive components (and relays) to do=20
> this.
>
> I would appreciate if any one could suggest such a circuit or method.
>
> Thanks in advance.
>
> John
>
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