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Author Topic: Meter Information Station  (Read 598 times)
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Lenexa, KS
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Figured I would do a little bit of showing off (and share the code or course) of my first Arduino based project.

http://meterproject.googlepages.com/

Its based on Tom Igoe's 'Net Data Meter' project from 'Making Things Talk' and Make: 11.

Comments question and feedback are welcome... (esp on my code.)
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I've been ogling your meter project since it appeared on the MAKE blog. Great job! It's too bad that meters like those are so hard to come by; did you just hunt them down through ebay or something? From your text and photos, it looks like they are a mix of 0 - 3 volt and 0 - 1 volt DC meters. Are you just sending the PWM signal through a voltage divider on each meter?

PS: you can still use the AC meter, you'll just have to adjust for the slight voltage difference after the (presumably) built in rectifier.
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Lenexa, KS
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Thanks for the kind words.

Yeah it took a few weeks searching on ebay before I found them. I thought about a voltage divider, but figured it was easier just to scale the PWM values in software.

Can you tell me more about the modifications/adjustments that i would need to make to use the AC meter?

Thanks!
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Greenwood, Indiana
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Generate a 60hz sine wave
http://www.epanorama.net/links/oscillator.html#sinewave

Feed it to the appropriate audio amplifier amplifier. Control the volume with either a digital SPI pot or PWM.

Couple it to the meter with a non-polarized capacitor. Small non electrolytic one.


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If it was designed by man it can be repaired by man.

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