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LED high striker? Answered

I'm wanting to build an electronic version of the popular carnival game High Striker. I would like it to be done with LEDs as the way it displays the power of the strike. This way i can arrange them however I need to. It's going to be themed to look like lightening, so they won't be in a perfectly straight line. Thanks in advance for any input.

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iceng (author)2013-09-04

Which microprocessor are you going to use ?

Or do you want to make it with logic ICs ?

A

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Dustin Cox (author)iceng2013-09-04

I hadn't decided yet. I'm really new at a lot of this. I know some about circuitry and electrical components, but I know absolutely nothing about microprocessors. That's why I'm asking for help. If anyone has ever done anything like this before, please help. But I can't really answer about what I plan on using, because I don't have a real plan as of yet. That's why I'm asking people.

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iceng (author)Dustin Cox2013-09-04

For simplicity use the LM3915 BAR / DOT LED driver from a simple voltage.

You can connect cascaded two ICs for 20LED or three ICs for 30LED up to 100LED
bar display.

Use a Load-Cell for under your strike plate and a simple op-amp integrator
to set your attack and decay timing and feed the output to the LM3914 ICs.

No moving parts, No uP easy peasy  could run off two 9V batteries.

I included the LM3914 spec PDF with lots of sample circuits.

The LM3915 is logarithmic and there is a LM3916 ...

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Dustin Cox (author)iceng2013-09-05

I do have a question. There are literally hundreds of types of load sensors. Is there a specific one you recommend. Not necessarily a specific model, but specific type (like button, through hole, etc)?

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iceng (author)Dustin Cox2013-09-05

What is the mass of your intended striker
That puts you in a range of  Load-Cell force about 50 times of your striker.
You don't need accuracy just a strong solid signal.
Go used, let price guide you.

Maybe Steve has one you could use.

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Dustin Cox (author)iceng2013-09-05

the striker will be custom made out of wood, but shouldn't weigh more than 5 pounds. If that's the case, the load cell would need to be at least 250 pounds. Is that correct?

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Dustin Cox (author)iceng2013-09-05

Thanks iceng. I had seen this method described for other projects (like a voltmeter) but wasn't sure if I could modify it to work for this application. I'll begin looking up the parts necessary and see what I can come up with. If I get to do the project, I'll make sure to put it on here so others can see how it's done.

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steveastrouk (author)2013-09-04

How are you going to measure the strike ?

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Dustin Cox (author)steveastrouk2013-09-04

Well, one thought I had was to use a system with a dynamo. Then the harder you hit it, the faster it would spin, which would mean more electricity through the system. There's also the ability to use an accelerometer for the trigger mechanism. I'm starting completely from the ground up, so I'm open to any idea to measure the strike.

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