Thank you, Thank you, Thank you!

 

Do you know what you'll be using for your power supply?
I'm going to bed.

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Ron

 

9 volt battery.

Me too, late here as well.

 

Here it is. There may be a better way to do this (like with a microcontroller), but I'm guessing you don't want to go that way, and even if you do, I ani't gonna program it for you!
Like I said, I'm just guessing about the speaker signal properties. I ran some simulations, based on a few milllivolts due to background noise, and a few tens to hundreds of millivolts of "brushing" signal, and it seemed to work, but the lowest signal frequency I considered was 100Hz, so you may have to C1 and/or C3 larger. Or it might not work at all. You get what you pay for.

Attached Images

speaker tap timer.PNG (36.4 KB, 10 views)

__________________
Ron

 

Thanks Roff, I'm gonna give that a try. I have to order a CD4040, don't have one of those. In the meantime I thought of this. I've been playing with it but no luck as of yet. Speaker driving a darlington array driving a small LED so you can see each light tap on the LED.

 

You saidOK, I didn't calculate the time based on 500/1min. That's over 100ms per brush. True, it is still milliseconds, but I was thinking maybe 10 or 20 at the most. You may have to increase C3 to 100uF.
Your LED idea is a phenomenon known by engineers as "feature creep" (or creature feep). The marketing guys say, "Hey, those engineers really can make it do all the stuff we wanted. Heck, I'll bet they could add a swizzle binder and a twinkling light!".

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Ron

 

LOL, Being a software engineer, I know all about "feature creep".
Seriously tho, not in addition to but instead of, until I receive some parts.

Is this possible? I've been goofing around with a darlington-tip120, trying to get a led to light with each tap.

 

I think software is even more prone to feature creep than hardware.
You won't get enough voltage from the speaker to drive the Darlington unless you bias it into class A operation. I think you can use one of the left-over comparators in the main circuit, once you get it built.

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Ron

 

Can you give me a general circuit breakdown for this? I have a comparator sitting here along with a tip120.

Already ordered the counter from newark.

 

Like I said on the other website, my "fondling" (hee, hee) of a speaker made a low voltage as seen on my 'scope.
It is a 5" 4 ohm speaker.
1) Rubbing it pretty hard produced a peak voltage of 0.1V.
2) Hitting it pretty hard produced a peak voltage of 1.0V.

Not enough to turn on a darlington transistor.

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Uncle $crooge

 

Yeah I know as I've already tried it, what I'm asking is, is there a way. Is it enough if amplified by say a 222 first? I know this sounds weird and I wish I could tell you exactly what I'm doing as I'm sure it would make it easier, but I cant just yet. What I can say is what I am trying to achieve is a completely new and unique idea. There is absolutely nothing like it on the market today.

 

Try this circuit.

Attached Images

spkr brush LED.PNG (15.3 KB, 7 views)

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Ron

 

I'll let you know what happens, thanks again for all your help. I wont forget..

 

Another thought as I Mess with this, could I use a optical emitter detector combo to detect slight movement?