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    Nerve/Brain/Muscle spike sensing

    Fuzz1, This exact same technique has been used for years in Cardiac monitoring. Cardiac Event monitors can sense a lengthy number of waveform shapes of your cardiac ecg and then capture and report on them (generally only the non-normal waveshapes). Devices often can connect using bluetooth or...
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    Coil replacement

    Agreed that coils aren't defined by a single attribute. I think your advice to try to ressurect the existing part is sound repair advice. The poster apparently believes he/she has damaged the part beyond repair. There's a few million engineers, however, that wil be quite surprised by your newly...
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    Coil replacement

    Not sure how you know what the correct inductance value is supposed to be, but its not all that difficult to wind your own inductors / coils. There is much information on the web to that. One might need a method of testing your home-built coil to see that its final value is close to your...
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    4v motor damaged?

    Unsolder the capacitors and see if the motor functions. A) Cap(s) could be damaged. B) If your 'test' power source is the solar panel, the Caps may be enough uFarad to effectively short the solar panel. Small solar panels have very low current output. The caps could be an effective short to the...
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    A/D Converter

    The Analog Devices AD671 appears to fit your qualifications. As far as Signal to Noise ratio, your input voltage scaling and its noise component will have as much impact on the total S/N ration as anything. spec sheet: http://www.datasheetcatalog.org/datasheet/analogdevices/AD671.pdf
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    Speakers, woofers, subwoofers..

    I'm a few days late Claw, but I throw a few brief descriptions: A speaker is a device which converts electrical impulses into actual audible sound. There are many types of speakers, including woofers and subwoofers. Tweeters are speakers that reproduce high frequencies. Woofers are speakers...
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