Dear Lubnan!

can you send me the picture of your final toggle switch... where you have applied 10K resistor with 100uf Capacitor...

I tried the same but didn't workout for me...

please help...

 

Just Tried with 10K & 100uf, seems to work fine.
As for False trigger, will try tomorrow and Update, Thanks.

Oh, by the way, there is this new problem i just noticed, Every time when i disconnect the Mains "220v" (when the Relay is not engaged) from the circuit, after disconnection the relay engages for about half second and disengages. Any way to overcome this problem also?

Please provide me the picture of this toggle switch... this not working for me

 

Should be something like this...

 

Welcome to AAC!

A thread belongs to the OP (original poster). Trying to take over someone elses thread is called hijacking, which is not allowed at All About Circuits. I have therefore given you a thread of your very own.

This was split from 555 Toggle switch problem.

I helped design a very similar circuit. What are you having problem with?

555 Bistable Multivibrator

 

Should be something like this...

Much as I hate to disagree, that will not work. The larger capacitance will swamp the smaller, and the smaller capacitor is the "memory" of the circuit.

 

Much as I hate to disagree, that will not work. The larger capacitance will swamp the smaller, and the smaller capacitor is the "memory" of the circuit.

Agreed. So the value of 10uF capacitor has to be smaller than C1, right?

Allen

 

No, eliminate the 10µF entirely, not needed or wanted. You will get greater benefit if the power supply Vcc is filtered.

Same thing with the parts on pin 4, Pin 4 just needs to go to Vcc, nothing more.

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No, I'll take it back about pin 4, it makes the 555 assume a definite start up condition. You can do the same thing with a really small cap on pins 2 & 6 which could go to either Vcc or ground. It is an either or, not both.

 

No, eliminate the 10µF entirely, not needed or wanted. You will get greater benefit if the power supply Vcc is filtered.

Same thing with the parts on pin 4, Pin 4 just needs to go to Vcc, nothing more.

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No, I'll take it back about pin 4, it makes the 555 assume a definite start up condition. You can do the same thing with a really small cap to GND from pins 2 & 6 which could go to either Vcc or ground. It is an either or, not both.

I recall a thread from a few months(?) back, where the OP was going nuts with false triggering. IIRC, I recommended a small cap on pins 2&6. That node was apparently picking up EMI from the relay switching. I think the cap was about 10% of the memory cap.

 

I can believe it, but it also selects the power up state of the toggle.

 

I can believe it, but it also selects the power up state of the toggle.

Unless you also use a power on reset RC on pin 4, and make the reset time constant longer than that at pins 2 & 6.