Audio amps and vu meters

Comments

• pwillard Posts: 321

  2008-04-08 21:41 edited 2008-04-08 21:41

  Ryester,
  
  A lot of us are much better at DIGITAL than ANALOG.· You might find that you get a lot more information from a place like this--> http://www.diyaudio.com/
  
  
  
  
  
  
  
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  There's nothing like a new idea and a warm soldering iron.
• PJAllen Banned Posts: 5,065

  2008-04-09 00:00 edited 2008-04-09 00:00

  There's an IC, the LM3916, with which you can make a VU-meter in the form of a LED dot-bar (10 levels) display; LEDs, a pot, a couple of resistors and, Bam!· I think that it should be fairly easy to add to a PSP·which has volume enough to drive you into deafness.
  
  http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=24272
  
  Post Edit -- One of these may be of interest to you:
  http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=K2668
  http://www.ramseyelectronics.com/cgi-bin/commerce.exe?preadd=action&key=MK146
  
  Post Edited (PJ Allen) : 4/9/2008 1:28:13 AM GMT
• Chris Savage Parallax Engineering Posts: 14,406

  2008-04-17 20:01 edited 2008-04-17 20:01

  I still have some old ExpressPCB layouts for some meters I built some years ago (these actually use the LM3915). These have excellent response, and while the inputs don't really load the signal much I used to couple them via op-amps set for unity gain. I can attach them if you like.
  
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  Chris Savage
  Parallax Tech Support
• Dgswaner Posts: 795

  2008-04-18 21:14 edited 2008-04-18 21:14

  I'm not familiar with Vu meters but I have build several amps from this site http://www.runoffgroove.com/articles.html they work great for Ipod amps/speakers.
  
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  "A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster
  
  DGSwaner