Using the newest Arduino board (duemilanove), a linear hall effect sensor (Honeywell ss495a), and a pretty standard LED I've managed to program and get the circuit in the video working. All it does is sense if the magnetic field is past a certain threshold and then lights up the LED. Also in the Arduino environment the serial displays the output voltage (0-5V mapped between 0-1023). What this doesn't show is how it'll be incorporated into the levitation system (http://www.youtube.com/watch?v=mumrEE82qAw).
nice, hook it up to a PWM pin and it will grow brighter and darker, somehow invert that and you've got yourself the code for a levitator.
jvcrules 7 months ago
THWG!
TheYJacket 11 months ago
You can just connect the led to the hall effect sensor...
tomasmerce 1 year ago
@RadioactiveLegos
Although there is a built in resistor, that leads to the built in LED. Pin 13 is connected in parallel before the resistor.
Tchnclfl 1 year ago
@Tchnclfl I think that LED is in pin 13, which has a built-in 1k resistor.
RadioactiveLegos 1 year ago
What a great way to fry an LED and your digital output.
You may want to learn what a current limiting resistor is.
Tchnclfl 1 year ago