electronics_shamim Posted May 2, 2007 Report Share Posted May 2, 2007 Sirs,Does anyone have complete schematic or part list required for a simple dB meter driver built around transistor/IC?Regards,Shamim-India.==== Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 2, 2007 Report Share Posted May 2, 2007 Here is a pretty good VU meter made with an LM3916 IC. I made some similar circuits with an LM3015 IC instead that displays 3dB steps. The datasheet shows how to cascade two ICs for a 60dB range.EDIT: OOps. Here it is: Quote Link to comment Share on other sites More sharing options...
electronics_shamim Posted May 2, 2007 Author Report Share Posted May 2, 2007 Dear Audioguru, thanks for your immediate response. You have sent me the vu meter built around (LEDs). The circuit i need is different. I mean to say that after the pre-amplifier out, it should be connected and the vu meter called db meter has the needle deflection, not LEDs.I hope you understand by now. However, I appreciate your immediate response and guidance. Regards, Shamim_India. ==== Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 2, 2007 Report Share Posted May 2, 2007 Hi Shamin,I have not seen a dB meter with a needle for about 30 years. Quote Link to comment Share on other sites More sharing options...
electronics_shamim Posted May 3, 2007 Author Report Share Posted May 3, 2007 Sir, I hope I have not clarified properly. Now to be clear I state like this:Like in an analogue multimeter (the needle deflects, in terms of ohms measurement, voltage etc.). So, a dB meter or the so called vu meter is also like that, in which the needle deflects (dancing) in rythms in relation to the speaker sound. For each channel it is there in the front panel top right hand side mounted unto the tape deck.I hope this time i have clarified you properly. Hope to receive a reply this time. With regards,shamim Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 3, 2007 Report Share Posted May 3, 2007 I haven't seen a tape deck for about 15 years. My cassette deck had LED VU meters. Quote Link to comment Share on other sites More sharing options...
MP Posted May 3, 2007 Report Share Posted May 3, 2007 Shamim,Are you looking for something like this?(click on the picture to enlarge it.)MP Quote Link to comment Share on other sites More sharing options...
audioguru Posted May 4, 2007 Report Share Posted May 4, 2007 The meter circuit posted by MP is a frequency meter, not a VU dB meter.A VU meter shows audio levels, not the frequency of a tone. Quote Link to comment Share on other sites More sharing options...
RDL2004 Posted May 4, 2007 Report Share Posted May 4, 2007 Maybe this will be of help:http://sound.westhost.com/project55.htmAnalog meters have not totally disappeared, for example:http://www.mcintoshlabs.com/mcprod/shopdisplayproducts.asp?hid=1&id=14&cat=Power+Amplifiers&prodid=1028&product=MC602 Quote Link to comment Share on other sites More sharing options...
electronics_shamim Posted May 4, 2007 Author Report Share Posted May 4, 2007 Sir, The reply posted by RDL2004 is the exact one which I wanted. A simple vu meter depicted therein by use of diodes is also fantastic. I wish to extend my sincere thanks to him for the efforts made to post me the same. Thanks again with regards, shamim_india.=== Quote Link to comment Share on other sites More sharing options...
MP Posted May 4, 2007 Report Share Posted May 4, 2007 The meter circuit posted by MP is a frequency meterOoops! Sorry about that Shamim. I attached the wrong drawing when posting. Thanks to RDL2004, it looks like you have what you are looking for. It is still simpler than the one I meant to post. Best of luck with your project!MP Quote Link to comment Share on other sites More sharing options...
electronics_shamim Posted May 5, 2007 Author Report Share Posted May 5, 2007 Sirs, I wish to have still more simpler db/audio peak level meter which can be interfaced just at the output of of pre-amplifier wired around BC148, which I had seen some years back, but I do not have the Circuit. Any idea pls.? However, I am very thankful to RDL2004, who has guided me properly. Thanks to Audioguru, who has been always kind to extend help. Thanks to MP who keeps me updated on immediate response. Regards, Shamim_India. Quote Link to comment Share on other sites More sharing options...
MP Posted May 5, 2007 Report Share Posted May 5, 2007 Shamim,I do not think you will find one simpler than the design with diodes that RDL posted. Still, with this one you do not have very good accuracy.MP Quote Link to comment Share on other sites More sharing options...
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