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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
| Qty | Part # | Description | Schematic ID | Source | |
|---|---|---|---|---|---|
| 1 |
|
SJ1-3523N | CONN JACK STEREO R/A 3PIN 3.5MM | J1 | Source |
| 1 |
|
BS6I | SNAPS 9V 6" LEADS I-STYLE | JP1 | Source |
| 1 |
|
50-0015-00 | SWITCH PB SPST ALT ACT PC MOUNT | S1 | Source |
| 1 |
|
SK100M035ST | CAPACITOR ALUM ELEC 10UF, 35V, RADIAL | C1 | Source |
| 1 |
|
EVN-D8AA03B14 | TRIMMER 10K OHM 0.1W TH | P1 | Source |
| 1 |
|
LM3916N-1 | LED BAR GRAPH DRIVER, 3916, DIP18 | IC1 | Source |
| 10 |
|
WP7113LID | 5MM LOW CURRENT RED LED, LAMP THOLE, BULK | LED1, LED2, LED3, LED4, LED5, LED6, LED7, LED8, LED9, LED10 | Source |
| 1 |
|
6LR61XWA/1SB | BATTERY IND ALKALINE 9 VOLT | Source | |
| 1 |
|
Y-Audio Cable | 6inch 3.5mm Stereo Jack/Two 3.5mm Stereo Plug Cable | Source |
Download BOM w/o images
Download BOM w/ images
Steps
26. 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.)
27. 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.
28. 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.
29. 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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