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    3 Channel Spectrum Analyzer - question

    I got the sockets for the 2 CI's. Now another question before I can peacefuly begin asembling... Can I use the power suply of my computer to power the circuit?  I mean the cable which powers the harddisk, that type of cable. I have read the 4 "pins" are 5V Null Null 12V . But somebody told...
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    3 Channel Spectrum Analyzer - question

    After a few hours of searching the internet I have discovered that this BM3900 has no datasheet or its datasheet can't be found with the most know search engines. All I could find, relevant, is this : http://www.inginerie.protectia-mediului.ro/engineering/electronics/sale/ic.htm IPRS Baneasa...
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    3 Channel Spectrum Analyzer - question

    I found an equivalent for the LM3900 at an electronics shop  - BM3900 . I hope this will work just as good as the LM3900. And I've also got the AN6884's.
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    3 Channel Spectrum Analyzer - question

          Ok...I think I should start with this : Thanks for looking up for that opamps, audioguru, but even there is a big problem and that is that I don't live anywhere near America. I live in Europe,Romania. And from what I've seen by checking a few electronics shops in the city, what you said...
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    3 Channel Spectrum Analyzer - question

    http://www.electronics-lab.com/projects/audio/037/index.html - here is the project. It really hit me when I read your reply and fopund out about the problem with the schematic. I have another question related to this project since I am still willing to go on constructing something like this ...
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    3 Channel Spectrum Analyzer - question

          I am new to electronics and I'm also in first degree at a engineering university. I have been requested to do a project of my choice for a class that I study - Electronic circuits and components.  I was very, very happy when I found a schematic on exactly the thing I desire to do - the 3...
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