Francois Robbertze wrote:
> I need to very simple and cheap circuit that will toggle a relay on
> and of on a pulse input.
>
> i.e.: first pulse(e.g. a key pressed) will switch relay on
>     second pulse will switch the relay off again etc.
>
> I can easily do this with a pic , but I need this to be simple..
>
> Can anyone help me or direct me to WebPages?
>
>  Is there a standard component that will be able to do the job?

Is this pulse coming from a mechanical switch?  If so, you need to consider
boucing.  A 10F200 can do what you want nicely.

If the pulse is a nice clean digital signal, then what you are asking for is
a flip flop that can be operated in toggle mode.


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