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Projects for cheap laser diodes

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LAN_403

Chip Fixes

Thu Dec 13 2012, 10:29PM

Registered Member #3781 Joined: Sat Mar 26 2011, 02:25AM
Location:
Posts: 701

I got three small laser diodes for $1 each.

Diameter: 6 mm
Length (including driver chip): 14 mm
Wavelength: 650 nm
Operating Voltage: 3v
Current Draw: 40 mA
Power: 5 mW

There's a 33 ohm resistor soldered to the board that is in series with the blue wire.

I don't really know much about lasers but I suppose these are too small to make a burning laser with?

EDIT: Pictures:

Also, the lens is adjustable:

Pinky's Brain

Fri Dec 14 2012, 04:54AM

Registered Member #2901 Joined: Thu Jun 03 2010, 01:25PM
Location:
Posts: 837

A Lissajous projector?

Sulaiman

Fri Dec 28 2012, 09:28AM

Registered Member #162 Joined: Mon Feb 13 2006, 10:25AM
Location: United Kingdom
Posts: 3141

I have similar units,
first 'thing' I made ... 'Predator' - type laser aiming device.

These modules can be easily modulated and/or modified,
there is space and holes for a 1N4148 anti-parallel with the laser diode to prevent damage due to accidental or deliberate reverse-polarity connection.

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