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BackSP3T K switch normally-open pushbutton push-button LCD illuminated right angle tact switch https://www.e-switch.com/system/asset/product_line/data_sheet/148/TL1250.pdf led push switch right angle tactile switch D MEC 5E single pole double throw, separate symbols | | R16, R17, R19, R20 **Potentiometer, 9 mm or 16 mm pots had long enough terminals, barely, to poke through the board, cross at 90° to minimize capacitance between traces - .3mm for non-power lines, .6mm if carrying power MK uses a ground plane. - when pressed, short +12V and Reset In - diode to U2-3 Clock In - diode to U2-3 Glide In - diode to U2-3 .
- NeoPixel, https://cdn-shop.adafruit.com/product-files/1138/SK6812+LED+datasheet+.pdf LED RGB NeoPixel addressable Kingbright, dual.
- Bourns 3224J, https://www.bourns.com/docs/Product-Datasheets/3224.pdf Potentiometer horizontal Bourns.