Hi every one .Is there any electronic circuit to replace the latching switches(push to /push to off)?

 

Hi every one .Is there any electronic circuit to replace the latching switches(push to /push to off)?

Yes.
What do you want to control with the push on / push off?
What power is available?

 

Yes.
What do you want to control with the push on / push off?
What power is available?

just i want to control one LED. 5v power is available.

 

Do you need it to come up in any particular state when the power is first applied?

 

Do you need it to come up in any particular state when the power is first applied?

Thank you for u r reply @crustschow.
My requirement is when i press the push button(Tack tile ) led will ON.And if press once again Led will be in OFF state.

 

Below is the LTspice simulation of an alternate action circuit which uses a CD4013 CMOS FF that changes state every time the push-button is pressed to alternately light the LED D1.

 

Thank you for u r reply @crustschow.
My requirement is when i press the push button(Tack tile ) led will ON.And if press once again Led will be in OFF state.

Why not use a maintained P.B.?
Push on- Push off?
You can also do it with a relay circuit flip-flop using a momentary P.B..
Max.

 

Below is the LTspice simulation of an alternate action circuit which uses a CD4013 CMOS FF that changes state every time the push-button is pressed to alternately light the LED D1.

View attachment 110992

Thank you Crustschow.Circuit is working fine ,I checked with simulation. If i want to contol 7 leds with different 7 tactile switches ? For these i want to use single ic or 7 number of CD4013?

 

Why not use a maintained P.B.?
Push on- Push off?
You can also do it with a relay circuit flip-flop using a momentary P.B..
Max.

Hi MaxHeadRoom , thank you for u r reply . Presently iam using same (maintained P.B). I want to eliminate using of maintained P.B ,because some time mechanical switch will give problem. so i thought use simple tactile switch with latch circuit.

 

If the D flip / flop circuit to be realized, then it may be easiest to use a MOS 4013 with Schmitt Trigger Clock Input, such as NXP HEF4013.
Then it requires only a pull down resistor and a R/C filter to get a safe switching the output.

 

The circuit you are after is called a toggle or T flipflop. Most general purpose J-K or D flipflop chips can be configured to do this. You also can do it with a hex inverter or any other inverting logic gate like a quad NAND or quad NOR chip. Search for 'toggle flip flop circuit' and you will get many schematics. Here is a 2-transistor circuit I lifted from somewhere in the past. Replace the LOAD resistor with a resistor and LED. You can delete the RESET switch.

Transistors = 2N7000 or 2N7002
No need for 1% tolerance resistors. 5% or 10% will work fine.

ak

 

I want to eliminate using of maintained P.B ,because some time mechanical switch will give problem. so i thought use simple tactile switch with latch circuit.

Not if you use an industrial version, Telemecanique etc, and also if you wish to reduce any load on the switch contacts, a small simple relay would do it.
Or use the single switch to operate a Mosfet direct.
Max.