on off every second press on button

[ostr1969]

how can i create simple circuit(dc) that will change state every second press?
press and release - on
press and release - still on
press and release - off
press and release - still off

or: another option
press - on
release - still on
press - off
release - still off

can it be done without controller?

 

[alec_t]

Welcome to ETO!
This page has some circuits for the second option. The first option would require more complicated circuitry.

 

[MikeMl]

This one: right here

 

[Les Jones]

One possible solution to the first option would be to use a CD4017 (Or CD4022). Each press of the button would clock the CD4017 to the next state.
You would have a power on reset circuit to set it to state 0 the first press would set it to state 1. State 1 and state 2 outputs would be ORed together to give the output. So in states 1 and 2 the output would be on. The second press would set it to state 2 (so the output of the OR gate would still be high.) The third press would go to state 3 (So the output would be off.) the fourth press would go to state 4 but output 4 would be wired back to the reset pin so it would jump back to state 0.

Les.

 

[Pommie]

The second bit of any binary counter that's clocked by the debounced button will do what you want.

Mike.

 

[dr pepper]

If you dont fancy the electronic approach you can use something like a sequencing relay, which will satisfy your second rule.