Re: Basic Stamp Controlled Spark Gap

["Tesla list" <tesla-at-pupman-dot-com>]

Original poster: "Harold Weiss by way of Terry Fritz <teslalist-at-qwest-dot-net>" <hweiss-at-new.rr-dot-com>

Hi All,

I would use either a shaft encoder or reflective target system.  Either of
these prevent the unbalenceing of the rotor.

David E Weiss

 > Original poster: "Crow Leader by way of Terry Fritz <teslalist-at-qwest-dot-net>"
<tesla-at-lists.symmetric-dot-net>
 >
 > I've made ghetto sensors by wrapping like 50 turns of magnet wire around a
 > regular 1/4" bolt and taping a magnet to whatever is spinning. It actually
 > costs, nothing.I don't have any waveforms here, but the pulses were pretty
 > fast and clean, and of a upto a few volts.
 >
 >
 > KEN
 >
 > ----- Original Message -----
 > From: "Tesla list" <tesla-at-pupman-dot-com>
 > To: <tesla-at-pupman-dot-com>
 > Sent: Tuesday, May 13, 2003 6:38 PM
 > Subject: Re: Basic Stamp Controlled Spark Gap
 >
 >
 >  > Original poster: "Ben McMillen by way of Terry Fritz
 > <teslalist-at-qwest-dot-net>" <spoonman534-at-yahoo-dot-com>
 >  >
 >  > Hi Jeremy, Terry,
 >  >     Why not use a hall effect sensor? I realize that the
 >  > fields we're dealing with here are quite strong, but if you
 >  > were to find a sensor that was tolerant of background EM
 >  > fields (of the tesla coil type) and use a small neodymium
 >  > magnet to get rotor position, you'd essentially have your
 >  > 'spike' to feed back into the MCU.. The idea here being
 >  > that the sensor would only give a 'strong' output when the
 >  > magnet passed by.. If you had a strong enough (and small
 >  > enough) magnet, and a bit of epoxy..
 >  msnip...