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Ad7750 — Parallax Forums

Ad7750

ArchiverArchiver Posts: 46,084
edited 2000-08-13 11:42 in General Discussion
Hi all,

Was fascinated by the AD7750 Product to Frequency converter that was
discussed on this board couple weeks back.

Its way out of my league, but I was thinking about hooking up that circuit
shown on the page 13 of spec sheets.

Was wondering, once I got familiar with the circuit if it could be adapted
to measure the power output from an induction heater coil.

Mark

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2000-08-12 23:26
    >>>>
    Date: Fri, 11 Aug 2000 11:31:05 -0700
    From: "techno_masai" <plunkettm@e...>

    Its way out of my league, but I was thinking about hooking up that
    circuit
    shown on the page 13 of spec sheets.

    Was wondering, once I got familiar with the circuit if it could be
    adapted
    to measure the power output from an induction heater coil.
    <<<<

    The short answer, I think, is... no.

    Induction heating is done usually with radio frequency energy
    which is outside of the capability of the AD7750.

    You need a directional wattmeter which can give you the
    net power delivered to the induction head - this is because
    in the transmission line to the head you have a forward and
    reflected component of energy. It's a bit complicated and
    probably not a subject for this list... [noparse][[/noparse]involving neither
    Linux nor Win2K :-) ].


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  • ArchiverArchiver Posts: 46,084
    edited 2000-08-13 11:42
    what you could do is use a standard radio watt meter
    microchip.com have got how to make one in there pic application section
    this would be the ideal thing for an induction heater coil type
    application
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