for a small childs game, I want to use a relay to make a buzzing sound, typical set up of putting a n/c contact in series with the coil. I want to use the output of a 4017 driven by a 555, (powered by a 9v battery_), and have the 10 outputs each have a different buzzing duration. maybe 2 seconds 3 seconds 4 seconds etc, and the buzz happening about 3-5 seconds apart. I guess I need all the durations to be trimmers, so I can tweek them, and the duration between the buzzes to also be a trimmer, so I can tweek. Whatcha think.

 

You can also make a buzzed with a CD4049,actually several buzzers. And the use 2 sections of that 4049 as a bridge driver for the speaker, just add a series capacitor.

 

You can also make a buzzed with a CD4049,actually several buzzers. And the use 2 sections of that 4049 as a bridge driver for the speaker, just add a series capacitor.

Sounds like a god idea...schematic??

 

Sounds like a god idea...schematic??

sorry...good...but someone is a god that comes up with a schematic

 

The typical circuit is a CMOS inverter, like a CD4069, with a capacitor from the input to the negative common and a resistor from the output back to the input. I will check my "CMOS COOKBOOK" for values. I must have loaned it to somebody. But that is the circuit described in an application note. It also shows a CD 4093 being used as a gated oscillator.
The circuit is about as simple as can be.

 

Why a relay instead of an electromechanical buzzer that is optimized to buzz?

 

Why a relay instead of an electromechanical buzzer that is optimized to buzz?

THAT IS TRUE.....I will

 

Mostly, the door-buzzer types are larger and very cheaply made. And you can have a whole lot of single-inverter buzzers in much less space. PLUS, they consume much less power.

 

NONE of the electronic sound generation schemes will duplicate the actual physical vibrations created by an electro-mechanical relay buzzer scheme. So it would be a medium sized relay, not one of the very smallest ones. But for all of those multiple outputs, possibly a smallest processor module will be less complex.
The alternative would be a compromise.

 

I want to use the output of a 4017 driven by a 555, (powered by a 9v battery_), and have the 10 outputs each have a different buzzing duration. maybe 2 seconds 3 seconds 4 seconds etc, and the buzz happening about 3-5 seconds apart.

I’d probably go with a second 555 in monostable mode for the adjustable buzz times — simple and easy to tweak.

The one issue I see with a counter is that each output of the 4017 is on till the next in sequence comes on. Only one output is high at any time while all the rest are held low. Having a 2 second, 3 second and 4 second buzz would not be possible with a 555 and 4017. Unless you want to use Q1 as the short beep, Q2 & Q3 a longer beep (precisely twice as long as the short beep) then have Q4, 5 & 6 be the long beep (three times longer than the short beep) you're going to be hard pressed to achieve that. Plus, the 555 is putting out a square wave. Every time pin 3 goes high the 4017 clocks from Q0 through Q9. Then it repeats. Unless you disable the clock pulse on pin 13.
A better approach would be to use a microcontroller. And don't ask me with help on that. I am absolutely blind when it comes to µC's. I've done about 15 minutes of coding in my lifetime and it's been 40 years since then. Plus, and this may be the reason why I resist µC's is that I'd need a way to interface with it. And I have even less idea how to do that. But I suspect a µC would be your best hope to achieve your goal. Fewer components, easier wiring, and the logic is all in the coding. Buzzing, length of each different buzz - and so on.
I'm with the idea of using a buzzer instead of a relay. Or an electronic approach, a speaker with a driver circuit.