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Would you know who makes/sells this oscillating mirror assembly ? It is inside many handheld barcode laser scanners :
[The black coil and the clear plastic parts]
Perhaps a laser light show module does a similar task?
A homebrew technique became popular in the psychedelic era: glue a mirror to a speaker cone.
Or apply magnetic attraction and repulsion more directly. Mount the mirror on a platform which has magnets attached. Make these respond (in X-Y fashion) to coils of wire carrying electrical current. You can move the mirror quickly to various angles of reflection.
Thanks for responding.
The purpose is to sweep a laser to a target repeatedly as from a triangle/sawtooth 1Hz wave. Not to modulate its orientation angle with audio, and space available is not much specially when a dedicated compact component exists. The mirror oscillates due to the black coil behind it on the picture.
The problem is finding the vendor/supplier :-(. Been all day searching and sending messages to chinese providers, hopefully will respond.
From my experience, the voice coil isn't driven with a triangle or sawtooth wave, it is pulsed and the mechanical resonance of the mirror spring does the rest. If you unplug a barcode scanner, the laser immediately stops but the mirror may continue to oscillate for several seconds while 'unpowered'.
Thanks.
The mechanical resonance of the mirror spring may work well just by pulsing, but it will not perform on the slow 1Hz as sought. That is why the plan is to feed a sawtooth waveform, perhaps removing the spring.
Got a message of three back from China, no mirror assembly for sale; just the whole 'engine' PC board. Any clues on how to search for vendors would be appreciated.
Several chinese sites promote sourcing but for what they want to sell, not what the customer wants. :-(
Can't help with suppliers but if it comes to making your own, you could try fixing a mirror instead of the rocker arm on a relay. With a little coercion (bending the contacts!) you can get a sensitive voice coil mechanism with return spring for almost nothing.
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