I asked this question earlier but got no response.  Just wondering if =
the coil and magnet, widely used, is better than an LED, and why?

Another question about this site........he uses a LED and Photo =
Transistor in place of the coil and magnet.   I have never used this.  =
Is one better than the other?   This approach would be smaller and =
lighter. =20


http://tinkeringcaveman.googlepages.com/home








I asked this question earlier but got =
no=20
response.  Just wondering if the coil and magnet, widely used, is =
better=20
than an LED, and why?
 
Another question about this =
site........he uses a=20
LED and Photo Transistor in place of the coil and magnet.   I =
have=20
never used this.  Is one better than the other?   This =
approach=20
would be smaller and lighter.  
 
 
http://tinkeringcaveman.go=
oglepages.com/home
 
Thanks, =
Ted