It is not likely you can drive the LED directly from the sensor - you
probably need some type of high impedance device like a mosfet to go between
the sensor and the LED.

--
Dan Hollands
1104 State Road
Webster NY 14580
585-703-2963

www.QuickScoreRace.com
"stocky" wrote in message
...
I am building a speed switch around a LM2907, but want to add a "pulse"
LED
that blinks every time the magnet goes past the senor....I'm having a
mental
blank, i'm sure it's easy but can't think how to do it! Should I
capacitively couple the signal from the sensor, so it doesnt mess up the
signal goint to the '2907 and use something like a schmitt trigger to
flash
the LED? I know the output amplitude from the sendor varies greatly with
speed, but I need the LED pulses to make it easy to setup. Ant
suggestions?