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Featured User: kurt
Open-source hardware project hosting is my passion. I spend most of my free time building neat gadgets or planning what I'll build next. I love building things, and I want to make Open Hardware Hub a place that inspires others to build, ...
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Updates 2013 February 18
It's been a while, hasn't it? Well, that's ok because we've got a lot of updates to talk about. Most of these have been effective on the site fora couple weeks now. A few may or may not be active when this article gets posted, but they'll certainly be applied in the ...
Mono VU Meter
Files
- VU Meter.sch - VU Meter EAGLE Schematic
- VU Meter Schematic.pdf - VU Meter PDF Schematic
Bill of Materials
This open source hardware project contains no parts.
Steps
. Connect terminals for 9V battery
Connect a pair of alligator clips to the ground and +9V wires. I used a set of black clips for ground so I could remember which clip was which polarity. You could also use a 9V clip instead of alligator clips for this step. (Connect the red wire to the right-hand rail and the black wire to the left-hand rail.)
. Connect 9V battery
Connect the ground alligator clip to the (-) side of the 9V battery, and the +9V alligator clip to the (+) side of the battery. If you are using a 9V battery clip, simply snap it onto your 9V battery.
. Adjust potentiometer
At this point, all of the LEDs may or may not light up. Plug the Y-splitter in to your PC and play some music. Adjust the trimpot with a small flathead screwdriver so that the loudest parts of songs just barely light up all the LEDs.
. Enjoy your new VU meter!
Enjoy your new VU meter and show it off to all your friends! Check out http://youtu.be/LT-YHW8Z-L8 to see my VU meter at work.
Download steps w/o images
Download steps w/ images
Revisions
7 - updated description
6 -
5 - added youtube link. updated line numbers.
4 - changed LED part
3 - added description to project image
2 - added file descriptions
1 - Initial project release
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