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Partial EBNF for Potentiometers
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| part = "PDB18", gangs, "-" pin-type, detent, shaft-length, shaft-style, "-", resistance, taper ; | |
| gangs = "1" | "2" ; | |
| pin-type = | |
| "K" (* PC pns vertical 12.5mm *) | | |
| "A" (* PC pins, vertical 18.0mm *) ; | |
| detent = | |
| "2" (* Center detents *) | | |
| "4" (* No Detents *) ; | |
| shaft-length = (* in millimeters *) | |
| "15" | "18" | "20" | "25" | "30" ; | |
| shaft-style = | |
| "F" (* Metal flatted *) | | |
| "K" (* Metal knurled *) | | |
| "P" (* Metal plain *) ; | |
| (* Standard code, e.g. "103" = "1,000" *) | |
| resistance = digit, digit, digit ; | |
| taper = | |
| "B" (* Linear *) | | |
| "A2" (* Logarithmic, audio *) ; | |
| digit = "0" | "1" | "2" | "3" | "4" | "5" | "6" | "7" | "8" | "9" ; |
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Source: Page 5 of https://www.bourns.com/docs/Product-Datasheets/PDB18.pdf