Involvement:Expert (understands the inner workings) - Ownership:1 week to 1 month
Modules work perfectly well on standard 5V supplies. The manual focus lens is of decent quality (though plastic), and easily adjusted.
Output looks like a good 5 mW to me, though 650 is not as visible as 635 nm available in some cheap lasers.
There is some white silicone compound inside that makes removing the 5 mW diode for experiments a bit tedious - but still well doable.
It is not hard to fit these modules with another laser diode (such as from a dvd burner). The adjustable optics and metal case makes them a good choice for laser enthousiasts.
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