Detect fast movement using photodiode

[Acetronics2]

Along the same lines, the data sheet for the part Alain points out has on page 11 another nice way of doing it.
http://www.google.com/url?sa=t&sourc...SILdHEv5RRcHYQ

Hi, Dave

Not so nice ...

as the goal, here, is to take care the detectors are not saturated by light ...

Alain