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Old 14th May 2008, 12:46 PM   (permalink)
Default Can you help me with this circuit

I want to know how this person has designed the values of the various resistors used
http://www.easytreasure.co.uk/bfo.htm
THANKS in advance!!!
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Old 14th May 2008, 04:25 PM   (permalink)
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Not sure what you need to know, the values are labeled on the schematic.
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Old 15th May 2008, 06:11 AM   (permalink)
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I don't make that circuit anymore. I'll use a dedicated chip that design for that.

Ex: TDA0161 - PROXIMITY DETECTOR

The circuit is in the data sheet.
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