Description:
Electronic circuit design.
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FM stereo
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I have a digital armband radio, for jogging. It has a FM stereo detector, with internal threshold. When the signal gets weak or noisy, it switches to mono, and the noise drops significantly. How does FM stereo decoding work, and why is it so much noisier than mono?
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A mechanical volume control that actually works!
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Like most everyone else, I have had many devices that included a mechanical rotary volume control. And as far as I can remember, on every single device, the volume control eventually failed, usually being the first problem. The symptom was always the same, eventually the low level volume would completely drop out, so that... more »
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custom ferrite magnetic cores- sources?
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Anyone bought small quantities of custom ferrite cores? I'm looking for a couple of special shapes, but made from common material like 3C90 or whatever (it's not very critical). Size will be fairly large-- several cubic inches of material. Any idea of sources and ballpark NRE costs?
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Moldable Iron Powder
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A long-term back-burner project just got my attention when I found out that Home Depot sells magnetic paint. The project is a levitating globe thingie, designed as a control systems trainer that lets the student program the control rules in C and see how different control strategies lead to different sorts of system... more »
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Experiment in Sea Level Rise
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On Mon, 23 Nov 2009 09:24:08 -0800, Geoff <ge...@invalid.invalid> wrote: ...You done gone and annoyed the leftist weenies again ;-) ...Jim Thompson
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