@janamarie Good luck! The one for static protection will be reverse biased, so you get at least an hint for the polarity of the array by measuring the voltages when shining on the extra die.
M
mecrisp@chaos.social
@mecrisp@chaos.social
Posts
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on today's installment of parts that terrify me: -
on today's installment of parts that terrify me: -
on today's installment of parts that terrify me:@janamarie If the extra dot in the corner is a plain simple silicon diode, you could excite it using a red laser pointer.
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on today's installment of parts that terrify me:@janamarie Thanks! With your hint, I see it. Two connections, then? Maybe the extra die in the corner serves to safely dissipate electrostatics?
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on today's installment of parts that terrify me:@janamarie This might help determining the pinout:
https://www.lasersam.org/sam/laserdio.htm#diodct1 -
on today's installment of parts that terrify me:@janamarie Could you add a photo of the electrical connection of the module? It seems as if the power LED array is accompanied by either a photo diode for power or reflection monitoring, or maybe a small, possibly visible wavelength LED for alignment/indication. This would require at least three separate connections.
You could shine bright sunlight or your handy EPROM eraser into the block and measure the voltages across the pins to get hints.
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on today's installment of parts that terrify me:@janamarie Here a similar-looking UV LED is mentioned:
https://reprap.org/forum/read.php?245,621163,623318#msg-623318