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January 6th 08, 05:36 PM
posted to rec.audio.pro,sci.electronics.equipment,rec.audio.tech,rec.radio.amateur.homebrew,sci.electronics.design
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inexpensive analog audio pitch (frequency?) meter or schematic/ plans for one?
Richard Crowley wrote:
"jack" wrote ... National Semi still makes a "frequency to voltage" converter chip, so does Analog. But here's a link to using a PLL -- from National Semi -- Application Note 210 http://www.national.com/an/AN/AN-210.pdf Note that publication is 29 years old and I don't think any of the mentioned ICs are still in production any more. Since when has that stopped real homebrewers? Ahh, I see a slew of cross- posted groups (reading from r.r.a.h) Michael |
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