Typically identified as a 20x4 character or graphic LCD display module.
The identification " KL SN102 94V-0 " most commonly refers to a Graphic LCD Display Module or its associated printed circuit board (PCB) substrate kl sn102 94v 0 datasheet pdf 18 exclusive
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Many of these units use a standard Hitachi HD44780 or compatible interface, though some versions may require a -5V contrast supply instead of the standard 0–5V range. How to Find the PDF Datasheet Typically identified as a 20x4 character or graphic
: Listings on eBay often include the "GRAYM1005" control board variant. while standard 'U' types use 0-5V.
controller (or compatible variants), a standard for character-based liquid crystal displays. Variations
Some versions (marked with an 'S') require -5V for contrast , while standard 'U' types use 0-5V.