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Have scrap saved an old HP printer for parts, and ran into a optical censor (the one that counts position of a printer head).
Pinouts as in drawing (black dots not relevant here just two plastic parts through the PCB board).
I haven't bothering numbering the pins for the led input, the...
On another thread Les Jones and I briefly discussed graphics editors (post #132 @ http://www.electro-tech-online.com/threads/lm723-psu-with-0v-lowest-voltage.148899/page-7)
I have been looking for a convenient, but powerful, vector graphics editing program for years.
I started with...