petel@teksce.SCE.TEK.COM (Pete Lancashire) (09/30/88)
How to modify the X10 Minicontroller. V+ = The supply positive rail as seen by the 1000uf/25V electrolytic V- = The supply negitive rail as seen by the 1000ug/25V electrolytic The suppy voltage is around 19-20Volts The house code is selected by a rotary PC switch which either selects open or V+. The device/function codes are selected by a 3 out by 8 in keyboard scanned matrix. Here is what I have so far. House Code selection. Pin Label ---------- 8 H1 9 H2 10 H4 11 H8 H8 H4 H2 H1 H8 H4 H2 H1 -- -- -- -- -- -- -- -- A 0 1 1 0 I 0 1 1 1 0 is pulled to V+ B 1 1 1 0 J 1 1 1 1 1 is open or floating C 0 0 1 0 K 0 0 1 1 D 1 0 1 0 L 1 0 1 1 E 0 0 0 1 M 0 0 0 0 F 1 0 0 1 N 1 0 0 0 G 0 1 0 1 O 0 1 0 0 H 1 1 0 1 P 1 1 0 0 Device/Function selection. =============================================== |Y-PIN | | =============================================== | 17 | 1 2 unused | Y-PINs are the inputs | 20 | 3 4 ON | X-PINs are the outputs | 18 | 5 6 ALL ON (all lights on) | | 19 | 7 8 BRITE | | 16 | 9 10 unused SEE NOTE!!!! | | 22 | 11 12 OFF | | 21 | 13 14 CLEAR (all units off) | | 23 | 15 16 DIM | =============================================== | | 1 28 25 < X-PIN | =============================================== NOTES: The Y-Pins are debounced and kept high with a 0.001uf (102) disk cap. Pin 16 is tied high and needs to have the foil cut at the PIN and a cap added. Selection is done by a contact closure between an X and Y pin. Example to turn off unit 7; first select unit 7 by shorting pins 19 and 1, then turn it off by shorting pins 22 and 25. You can get the controller into a duplex box by pulling up the two big caps and cutting off the part of the board where the switch matrix was. That's all for now.... Next a circuit to do a device select then a function, something like the Levitons -pete Pete Lancashire petel@teksce.sce.tek ...!tektronix!tekgen!teksce!petel