Circuit provides laser diode control: 09/19/2002 EDN -
Design Ideas / Laser diodes are sensitive to ESD, rapid
turn-on currents, and over voltage conditions. To address those
problems, the simple laser-diode controller in Figure 1 has
several functions. The first part of the circuit comprises an
8.2V zener diode, D1 that forms the heart of a constant-voltage
source for the laser diode..
Laser Barrier System Uses Tone Detection : 10/14/02
Electronic Design - Ideas for Design / In a laser barrier
system, the receiver circuit generally uses signal amplitude for
detection purposes. This configuration yields a complex circuit
with a number of components, including an amplifier, a filter,
and a threshold detector. But you can...
Laser Communication System: This is a simple Laser
communication system. It can transmit and receive signal from
any audio device.Communication distance is few meters. All
components are not critical. Transistor 2N2222 may be on the
coolrib. Laser diode is from laser pointer
