"ding" circuit

I'd like Halle Berry to make a pleasant 'ding' sound. We all have wishes.

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I'll go for making the universal "any sound you want" alarm. So....mp3 player + amplifier + speaker. Ebay might have some cheap mp3 players. Maybe for $20.00 or less.. You could play "ding", "boing", "whoooop", "Eeee Eeee" and 100's of amusing sound effects :) D from BC

Can you see into them from the outside? ;-)

Best regards, Spehro Pefhany

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Might want to be careful about importing such items from Asia-- there's a couple of different pieces of IP that might not make it into a developed country.

Best regards, Spehro Pefhany

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Circuit that emulates the ding-dong of chimes - just build one "ding" oscillator

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Sure. Just compute v = A * sin(omega*t) * e^-t. ;-)

Cheers! Rich

Oh, damn! I just looked in google images for "klaxon", and a bunch of them seem to be air-operated, but I always thought they just go "Honk", or "HonkHeenk". (a la Clarabelle.)

But I'd like to see one that goes "Ah-OOO-Gah!" when you squeeze the bulb! You need some kind of mechanical action to differentiate between the Ah-, OOh, and Gah parts. ;-)

I think the real ones are built like a noisy siren.

Cheers! Rich

Well, there you go. I knew it was a sensitive subject but let me just guess how it happens.

Your coffee machine goes MNARR! MNARR! MNARR!

Your wife, who has being pretending to sleep, rapidly wakes up and straps you down on the bed. Then she pinches your nose, shoves a couple of Viagra down your mouth and holds her hand over it until you swallow.

She waits 20 minutes, screams 'Bitch' at you and then, having donned and shined her latex costume, she rapes you senseless for the next two hours.

Then you get to go to work with an embarrasing woody for the rest of the day.

And, now you want a coffee machine that softly goes bing?

DNA

Like the ping of some microwave ovens, only quieter?

One can buy a cheap bicycle bell and just have a small solenoid hit it.

For a solid state solution I would have a small micro reading a sound sample from a DIP8 serial EEPROM and feeding it into a DIP8 packaged DAC.

I was thinking of making something like that for work to play a loud gong when the sandwich man arrives. Or for Halloween night, a doorbell that plays a blood-curdling scream, shrieks of pain, or informs trick or treaters that they will be flayed alive and their skin used for making lampshades and dresses. :-O

Ring a resonant circuit. Details in my Active Filter Cookbook.

AKA a harp.

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Many thanks,

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Winfield Hill wrote in news: snipped-for-privacy@drn.newsguy.com:

Win,

I didn't see anyone else mention this "dinger", but I've used it for a lot "pleasent" alarms, including hospital nursing stations, car headlight alarms. It consists of a Sonalert, paralleled by a ~100uF electrolytic, and briefly pulsed at the rated voltage. It gives a very nice decaying ring tone, and is super simple.

Ken

!!! That's why that name sounded so familiar....I went digging into my box of electronics books.. "The Active Filter Cookbook" by Lancaster.. One of my favorite books..It got me a design job...built my active crossovers...etc..

Thanks Don... D from BC

The ideal ding (the same as the "you are now free to move about the cabin" airplane ding) is made by those Polycom speakerphones (the 3-legged starfish variety) when you turn them on. So buy one of those (~$300) and tear it apart for the ding!

I bet a nice sounding ding would require a big enough speaker that it would be just as practical to use a mechanical dinger.

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Ben Jackson AD7GD

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You could buy a variant of the domino game called "Mexican Train". Very entertaining to play, my wife and I do that a lot. Comes with a gizmo that plays the sounds of an old choo-choo train, miraculously out of a teeny piezo. Steam, whistles, bells, wagons rolling and all. Hook that up to your coffee warmer and you've created a dual-purpose unit out of it. And for sure nobody else will have a cup heater with this kind of sound.

If you want to get fancy and for sports wanted to cram it all into a puny micro you could create a "ding" using wave digital filter elements. Doesn't need much RAM and doesn't need a HW multiplier.

Once I did it the low-tech way: Door bell ringer, $0.10 from a rummage box at a garage sale. A two-transistor one-shot goosed the solenoid and "BONGGGGG".

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Regards, Joerg

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Nice one!.

Seeing as there's been a lot of talk and little action ... :) This setup seems pretty minimal. The pot will adjust from 100% oscillation through to a decay of a couple of seconds, or down to just 2 or 3 cycles. I find a damped sine rather pleasing. john

,----------------------------, 1Meg | +5V | ___ | |\\| 100n 100n | ,-|___|-, '--|-\\ || || | | | || | >---o-----||--o--||----o ,--o--->|--o-||-o--|+/ | || | || | | IN914 || | |/| | .-. | | o 100n| 0V | | |470 | |=|> | | | | | | o | Opamp | '-' | | | | | | +5V | | +2.5V | -Push to Ding- | | ___ ___ | | o---|___|-o-|___|--o +5V | | 1k | 1k | | | | --- | 2k2.-. | o ---220n | | | | Audio Out | | | | | +2.5V | '-' | .-. | '-------------------------->| | o---o-- +2.5V | |220ohm pot | | 'Twin T' (1500Hz) '-' 2k2.-. |10uF | | | --- .-. | | --- | | '-' | | |1k | | '-' 0V 0V | +2.5V

(created by AACircuit v1.28 beta 10/06/04

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OK...If you insist on a quiet sounding tone that won't disturb the wifey, It should be a slow rising and slow decaying tone like the example below...(LT spice SwitchercadIII simulator needed to run example)

*LTspice filename=ding.cir *Coffee heater ding-tone v1 1 0 ac 1 sin(0 1 450 .0001) v2 2 0 ac 1 PULSE(0 1 0 1 1 .01 .01) b1 3 0 V=(V(1)*V(2)) .tran 2 .wave .\\ding.wav 16 44100 v(3)

Twin-Tee's tend to be cantankerous. Use a gyrator-based filter structure instead....

...Jim Thompson

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|  James E.Thompson, P.E.                           |    mens     |
|  Analog Innovations, Inc.                         |     et      |
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|  E-mail Address at Website     Fax:(480)460-2142  |  Brass Rat  |
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I love to cook with wine.      Sometimes I even put it in the food.

A suitable carillon-sounding bell tone can be made from three harmonics (F, 3F, 5F) at roughly equal amplitudes, with the F decaying at 1 second, 3F decaying at 1/3 second, and 5F decaying at 1/5 second (you get the idea)... Lotsa little solid state gizmos can generate and/or playback this kind of sound. I did it on a synthesizer, once, for a buddy who had some music-school connections. We got good sound the first try, then we tweaked everything... it never got better.

Those 3 tones would wake me up. I think a single 440Hz fadein-fadeout tone would be the most undisturbing to someone sleeping.

BTW, What 'F' did you have in mind?