What are the loads?
Still not seeing the complete circuit.

The load of the Radio PB Circuit is the PWM circuits 1 to 7 which give PWM output to the MOSFET switching module shown above. This MOSFET module switches power ON and OFF to another main load which is a DC electromagnet that is shown in the circuit. The load of the Radio PB circuit is only the PWM s and the MOSFET module.

 

Instead of powering the 555s with the outputs of the radio button circuit, connect the outputs to the reset line of the 555s instead.

That way when any radio button output is high the analog switch will be closed and that 555 will be active.

 

Like this:

 

Instead of powering the 555s with the outputs of the radio button circuit, connect the outputs to the reset line of the 555s instead.

That way when any radio button output is high the analog switch will be closed and that 555 will be active.

Ok, so I power all the 555 timers from the power source all the time, and when the reset pin is connected to the radio PB output that 555 timer will be active giving the PWM output to the 4016. Now I have to change the reset connections of all the PWM circuits. I will try that. Thanks.

 

Like this:

Thanks for the circuit.

 

Like this:
View attachment 327800

Can't the Radio PB output be directly connected to the reset pins of the 555s? It does not need to go through the 4016 to the reset pin. 4016 is only to make sure the other 555 timers are isolated when one is giving PWM output it is not present at the output pins of the rest of the 555s. That is the purpose of 4016.

Each output of the Radio PB circuit goes to corresponding 4016 control pin and to the reset of the 555. I made changes to the circuit here

 

the CD4016is not intended for use as a power switch as I recall.

 

the CD4016is not intended for use as a power switch as I recall.

Can it be used to switch PWM signals.

 

Can't the Radio PB output be directly connected to the reset pins of the 555s? It does not need to go through the 4016 to the reset pin.

Yes and you can remove that 2.2K resistor as well.

 

This is the circuit in post #67 without the 4016 ICs.
View attachment 327794This is the MOSFET switching module.
View attachment 327795The PWM signal is given to this module which switches the 12 Volts supply ON and OFF to the load at different frequencies of the PWM. I suppose the load of the PWM circuits is only this MOSFET module and it draws small current only to switch ON and OFF like a relay or contactor.

I updated my circuit to show the Mosfet Module. See Below.
BTW - You can run the whole circuit with 12v DC supply if you wish.

 

I updated my circuit to show the Mosfet Module. See Below.
BTW - You can run the whole circuit with 12v DC supply if you wish

Thanks, eetech00.

I have a doubt. What is this blue marking shown here, where does that connect to.

 

Thanks, eetech00.

I have a doubt. What is this blue marking shown here, where does that connect to.
View attachment 327848

Those are unused pins and do not connect to anything.

 

Those are unused pins and do not connect to anything.

Ok so I may not have understood its working clearly but as per the circuit I am thinking that all the PWM circuits are ON all the time powered from a different source generating PWM outputs and when the push button is pressed, the selected output is sent to the MOSFET module.

 

all the PWM circuits are ON all the time powered from a different source generating PWM outputs and when the push button is pressed, the selected output is sent to the MOSFET module.

That's okay as long as it's the same voltage as the rest of the circuits.

 

Ok so I may not have understood its working clearly but as per the circuit I am thinking that all the PWM circuits are ON all the time powered from a different source generating PWM outputs and when the push button is pressed, the selected output is sent to the MOSFET module.

Yes, and as Crutchow mentioned, they should all use the same supply voltage as the rest of the circuit. Your using NE555's, that's OK , but I would use the CMOS LMC555's instead because they use much less power and they don't need to provide much drive output.

 

BTW - You can substitute 2ea CD4013B's for the CD40175B if needed. The design won't be as clean, but it will work.

 

I don't think the OP wants all of the 555s to be active at the same time because they want to have LED indicators on the outputs to show which one is providing the output.

 

I don't think the OP wants all of the 555s to be active at the same time because they want to have LED indicators on the outputs to show which one is providing the output.

No problem.
I added another CD4051B (U3) to activate the selected 555 generator. Each 555 reset is normally pulled down unless selected.
The TS can add an LED to each output to show the active generator. If we want, we can get fancy and use a single 7-segment display and 7-segment Driver (CD4511B) to show the selected output.

 

No problem.
I added another CD4051B (U3) to activate the selected 555 generator. Each 555 reset is normally pulled down unless selected.
The TS can add an LED to each output to show the active generator. If we want, we can get fancy and use a single 7-segment display and 7-segment Driver (CD4511B) to show the selected output.

As ElectricSpidey said I like to have indicating lights and each one pwm active at time. Thanks for the modified circuit.

 

BTW - You can substitute 2ea CD4013B's for the CD40175B if needed. The design won't be as clean, but it will work.

I will try to get the 40175Bs its quite rare in my place but I see it in the market online I can get it.