Resistance is futile, your data will be assimilated (Linux/CentOS, Solaris) 2026-04-10T14:29:11Z Alchy Copyright 2026, Alchy SPHPBLOG Payment Card Industry (PCI) Data Security Standard https://pcicompliance.stanford.edu/sites/default/files/pci_dss_v3-2.pdf
]]> http://alchy.org:443/alchy/index.php?entry=entry170314-085016 2017-03-14T00:00:00Z 2017-03-14T00:00:00Z Capacitor Discharging
#!/usr/bin/python

import math
from numpy import arange

charge = []
R = 1
C = 0.1

Vc = 0.0
for t in arange(0, 1.6, 1 / (1024.0 * 1.6)):
Vc = 1 - math.exp(-t/(R*C))
charge.append(Vc)

pos = 0
spl = 0
top1023 = charge[:1024]
for item in top1023:
#print " charge %.8f" % item
#print "discharge %.8f" % (1.0 - item)
#print "uint16_t[%d] = discharge %d" % (pos, (((1 - item) * 1024) - 1))
print "%d, " % (((1 - item) * 1024) - 1),
pos += 1
spl += 1
if spl > 15:
spl = 0
print
print
print "elements: %d" % len(top1023)





1023,  1016,  1010,  1004,  998,  992,  986,  980,  974,  968,  962,  956,  950,  944,  939,  933,
927,  922,  916,  910,  905,  899,  894,  888,  883,  878,  872,  867,  862,  856,  851,  846,
841,  836,  831,  826,  821,  816,  811,  806,  801,  796,  791,  786,  781,  777,  772,  767,
762,  758,  753,  749,  744,  739,  735,  730,  726,  722,  717,  713,  708,  704,  700,  696,
691,  687,  683,  679,  675,  671,  666,  662,  658,  654,  650,  646,  642,  639,  635,  631,
627,  623,  619,  616,  612,  608,  604,  601,  597,  593,  590,  586,  583,  579,  575,  572,
568,  565,  562,  558,  555,  551,  548,  545,  541,  538,  535,  531,  528,  525,  522,  519,
515,  512,  509,  506,  503,  500,  497,  494,  491,  488,  485,  482,  479,  476,  473,  470,
467,  464,  462,  459,  456,  453,  450,  448,  445,  442,  440,  437,  434,  432,  429,  426,
424,  421,  419,  416,  413,  411,  408,  406,  403,  401,  399,  396,  394,  391,  389,  387,
384,  382,  379,  377,  375,  373,  370,  368,  366,  364,  361,  359,  357,  355,  353,  350,
348,  346,  344,  342,  340,  338,  336,  334,  332,  330,  328,  326,  324,  322,  320,  318,
316,  314,  312,  310,  308,  306,  304,  302,  301,  299,  297,  295,  293,  292,  290,  288,
286,  284,  283,  281,  279,  278,  276,  274,  272,  271,  269,  268,  266,  264,  263,  261,
259,  258,  256,  255,  253,  252,  250,  249,  247,  245,  244,  242,  241,  240,  238,  237,
235,  234,  232,  231,  229,  228,  227,  225,  224,  223,  221,  220,  218,  217,  216,  214,
213,  212,  211,  209,  208,  207,  205,  204,  203,  202,  200,  199,  198,  197,  196,  194,
193,  192,  191,  190,  188,  187,  186,  185,  184,  183,  182,  181,  179,  178,  177,  176,
175,  174,  173,  172,  171,  170,  169,  168,  167,  166,  165,  164,  163,  162,  161,  160,
159,  158,  157,  156,  155,  154,  153,  152,  151,  150,  149,  148,  147,  146,  146,  145,
144,  143,  142,  141,  140,  139,  139,  138,  137,  136,  135,  134,  133,  133,  132,  131,
130,  129,  129,  128,  127,  126,  125,  125,  124,  123,  122,  122,  121,  120,  119,  119,
118,  117,  117,  116,  115,  114,  114,  113,  112,  112,  111,  110,  110,  109,  108,  108,
107,  106,  106,  105,  104,  104,  103,  102,  102,  101,  100,  100,  99,  99,  98,  97,
97,  96,  96,  95,  94,  94,  93,  93,  92,  92,  91,  90,  90,  89,  89,  88,
88,  87,  87,  86,  85,  85,  84,  84,  83,  83,  82,  82,  81,  81,  80,  80,
79,  79,  78,  78,  77,  77,  76,  76,  75,  75,  75,  74,  74,  73,  73,  72,
72,  71,  71,  70,  70,  70,  69,  69,  68,  68,  67,  67,  67,  66,  66,  65,
65,  65,  64,  64,  63,  63,  63,  62,  62,  61,  61,  61,  60,  60,  60,  59,
59,  58,  58,  58,  57,  57,  57,  56,  56,  56,  55,  55,  55,  54,  54,  54,
53,  53,  53,  52,  52,  52,  51,  51,  51,  50,  50,  50,  49,  49,  49,  48,
48,  48,  48,  47,  47,  47,  46,  46,  46,  45,  45,  45,  45,  44,  44,  44,
43,  43,  43,  43,  42,  42,  42,  42,  41,  41,  41,  41,  40,  40,  40,  40,
39,  39,  39,  39,  38,  38,  38,  38,  37,  37,  37,  37,  36,  36,  36,  36,
36,  35,  35,  35,  35,  34,  34,  34,  34,  34,  33,  33,  33,  33,  32,  32,
32,  32,  32,  31,  31,  31,  31,  31,  30,  30,  30,  30,  30,  30,  29,  29,
29,  29,  29,  28,  28,  28,  28,  28,  27,  27,  27,  27,  27,  27,  26,  26,
26,  26,  26,  26,  25,  25,  25,  25,  25,  25,  24,  24,  24,  24,  24,  24,
24,  23,  23,  23,  23,  23,  23,  22,  22,  22,  22,  22,  22,  22,  21,  21,
21,  21,  21,  21,  21,  21,  20,  20,  20,  20,  20,  20,  20,  19,  19,  19,
19,  19,  19,  19,  19,  18,  18,  18,  18,  18,  18,  18,  18,  18,  17,  17,
17,  17,  17,  17,  17,  17,  17,  16,  16,  16,  16,  16,  16,  16,  16,  16,
15,  15,  15,  15,  15,  15,  15,  15,  15,  15,  14,  14,  14,  14,  14,  14,
14,  14,  14,  14,  13,  13,  13,  13,  13,  13,  13,  13,  13,  13,  13,  13,
12,  12,  12,  12,  12,  12,  12,  12,  12,  12,  12,  12,  11,  11,  11,  11,
11,  11,  11,  11,  11,  11,  11,  11,  11,  10,  10,  10,  10,  10,  10,  10,
10,  10,  10,  10,  10,  10,  10,  9,  9,  9,  9,  9,  9,  9,  9,  9,
9,  9,  9,  9,  9,  9,  9,  8,  8,  8,  8,  8,  8,  8,  8,  8,
8,  8,  8,  8,  8,  8,  8,  8,  7,  7,  7,  7,  7,  7,  7,  7,
7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  6,  6,  6,  6,  6,
6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,
6,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,
5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  4,  4,  4,  4,  4,
4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
4,  4,  4,  4,  4,  4,  4,  4,  3,  3,  3,  3,  3,  3,  3,  3,
3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,
3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  2,  2,  2,
2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  0


top1023.reverse()


0,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,  1,
1,  1,  1,  1,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,  2,
2,  2,  2,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,
3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,  3,
3,  3,  3,  3,  3,  3,  3,  3,  4,  4,  4,  4,  4,  4,  4,  4,
4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,  4,
4,  4,  4,  4,  4,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,
5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  5,  6,
6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,  6,
6,  6,  6,  6,  6,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,  7,
7,  7,  7,  7,  7,  7,  7,  7,  8,  8,  8,  8,  8,  8,  8,  8,
8,  8,  8,  8,  8,  8,  8,  8,  8,  9,  9,  9,  9,  9,  9,  9,
9,  9,  9,  9,  9,  9,  9,  9,  9,  10,  10,  10,  10,  10,  10,  10,
10,  10,  10,  10,  10,  10,  10,  11,  11,  11,  11,  11,  11,  11,  11,  11,
11,  11,  11,  11,  12,  12,  12,  12,  12,  12,  12,  12,  12,  12,  12,  12,
13,  13,  13,  13,  13,  13,  13,  13,  13,  13,  13,  13,  14,  14,  14,  14,
14,  14,  14,  14,  14,  14,  15,  15,  15,  15,  15,  15,  15,  15,  15,  15,
16,  16,  16,  16,  16,  16,  16,  16,  16,  17,  17,  17,  17,  17,  17,  17,
17,  17,  18,  18,  18,  18,  18,  18,  18,  18,  18,  19,  19,  19,  19,  19,
19,  19,  19,  20,  20,  20,  20,  20,  20,  20,  21,  21,  21,  21,  21,  21,
21,  21,  22,  22,  22,  22,  22,  22,  22,  23,  23,  23,  23,  23,  23,  24,
24,  24,  24,  24,  24,  24,  25,  25,  25,  25,  25,  25,  26,  26,  26,  26,
26,  26,  27,  27,  27,  27,  27,  27,  28,  28,  28,  28,  28,  29,  29,  29,
29,  29,  30,  30,  30,  30,  30,  30,  31,  31,  31,  31,  31,  32,  32,  32,
32,  32,  33,  33,  33,  33,  34,  34,  34,  34,  34,  35,  35,  35,  35,  36,
36,  36,  36,  36,  37,  37,  37,  37,  38,  38,  38,  38,  39,  39,  39,  39,
40,  40,  40,  40,  41,  41,  41,  41,  42,  42,  42,  42,  43,  43,  43,  43,
44,  44,  44,  45,  45,  45,  45,  46,  46,  46,  47,  47,  47,  48,  48,  48,
48,  49,  49,  49,  50,  50,  50,  51,  51,  51,  52,  52,  52,  53,  53,  53,
54,  54,  54,  55,  55,  55,  56,  56,  56,  57,  57,  57,  58,  58,  58,  59,
59,  60,  60,  60,  61,  61,  61,  62,  62,  63,  63,  63,  64,  64,  65,  65,
65,  66,  66,  67,  67,  67,  68,  68,  69,  69,  70,  70,  70,  71,  71,  72,
72,  73,  73,  74,  74,  75,  75,  75,  76,  76,  77,  77,  78,  78,  79,  79,
80,  80,  81,  81,  82,  82,  83,  83,  84,  84,  85,  85,  86,  87,  87,  88,
88,  89,  89,  90,  90,  91,  92,  92,  93,  93,  94,  94,  95,  96,  96,  97,
97,  98,  99,  99,  100,  100,  101,  102,  102,  103,  104,  104,  105,  106,  106,  107,
108,  108,  109,  110,  110,  111,  112,  112,  113,  114,  114,  115,  116,  117,  117,  118,
119,  119,  120,  121,  122,  122,  123,  124,  125,  125,  126,  127,  128,  129,  129,  130,
131,  132,  133,  133,  134,  135,  136,  137,  138,  139,  139,  140,  141,  142,  143,  144,
145,  146,  146,  147,  148,  149,  150,  151,  152,  153,  154,  155,  156,  157,  158,  159,
160,  161,  162,  163,  164,  165,  166,  167,  168,  169,  170,  171,  172,  173,  174,  175,
176,  177,  178,  179,  181,  182,  183,  184,  185,  186,  187,  188,  190,  191,  192,  193,
194,  196,  197,  198,  199,  200,  202,  203,  204,  205,  207,  208,  209,  211,  212,  213,
214,  216,  217,  218,  220,  221,  223,  224,  225,  227,  228,  229,  231,  232,  234,  235,
237,  238,  240,  241,  242,  244,  245,  247,  249,  250,  252,  253,  255,  256,  258,  259,
261,  263,  264,  266,  268,  269,  271,  272,  274,  276,  278,  279,  281,  283,  284,  286,
288,  290,  292,  293,  295,  297,  299,  301,  302,  304,  306,  308,  310,  312,  314,  316,
318,  320,  322,  324,  326,  328,  330,  332,  334,  336,  338,  340,  342,  344,  346,  348,
350,  353,  355,  357,  359,  361,  364,  366,  368,  370,  373,  375,  377,  379,  382,  384,
387,  389,  391,  394,  396,  399,  401,  403,  406,  408,  411,  413,  416,  419,  421,  424,
426,  429,  432,  434,  437,  440,  442,  445,  448,  450,  453,  456,  459,  462,  464,  467,
470,  473,  476,  479,  482,  485,  488,  491,  494,  497,  500,  503,  506,  509,  512,  515,
519,  522,  525,  528,  531,  535,  538,  541,  545,  548,  551,  555,  558,  562,  565,  568,
572,  575,  579,  583,  586,  590,  593,  597,  601,  604,  608,  612,  616,  619,  623,  627,
631,  635,  639,  642,  646,  650,  654,  658,  662,  666,  671,  675,  679,  683,  687,  691,
696,  700,  704,  708,  713,  717,  722,  726,  730,  735,  739,  744,  749,  753,  758,  762,
767,  772,  777,  781,  786,  791,  796,  801,  806,  811,  816,  821,  826,  831,  836,  841,
846,  851,  856,  862,  867,  872,  878,  883,  888,  894,  899,  905,  910,  916,  922,  927,
933,  939,  944,  950,  956,  962,  968,  974,  980,  986,  992,  998,  1004,  1010,  1016,  1023



#!/usr/bin/python

import math
from numpy import arange

charge = []
R = 1
C = 0.1

Vc = 0.0
for t in arange(0, 1.1, 1 / (1024.0 * 1.1)):
    Vc = 1 - math.exp(-t/(R*C))
    charge.append(Vc)

pos = 0
spl = 0
top1023 = []
top1023 = charge[:1024]
#top1023.reverse()

for item in top1023:
    print "%d, " % (((1 - item) * 1048575)),
    pos += 1
    spl += 1
    if spl > 15:
        spl = 0
        print
print
print "elements: %d" % len(top1023)



1048575,  1039307,  1030121,  1021016,  1011992,  1003047,  994182,  985394,  976685,  968052,  959496,  951016,  942610,  934279,  926021,  917836,
909724,  901683,  893714,  885815,  877985,  870225,  862534,  854910,  847354,  839865,  832441,  825084,  817791,  810563,  803399,  796298,
789260,  782284,  775370,  768517,  761724,  754992,  748319,  741704,  735149,  728651,  722211,  715828,  709501,  703230,  697014,  690854,
684748,  678695,  672697,  666751,  660858,  655017,  649228,  643489,  637802,  632165,  626577,  621039,  615550,  610109,  604717,  599372,
594074,  588824,  583619,  578461,  573348,  568281,  563258,  558280,  553345,  548454,  543607,  538802,  534040,  529320,  524641,  520004,
515408,  510853,  506337,  501862,  497426,  493030,  488672,  484353,  480072,  475829,  471623,  467455,  463323,  459228,  455169,  451146,
447159,  443206,  439289,  435406,  431558,  427744,  423963,  420216,  416502,  412820,  409172,  405555,  401971,  398418,  394896,  391406,
387947,  384518,  381119,  377751,  374412,  371103,  367823,  364572,  361349,  358155,  354990,  351852,  348742,  345660,  342605,  339577,
336575,  333601,  330652,  327730,  324833,  321962,  319116,  316296,  313500,  310729,  307983,  305261,  302563,  299888,  297238,  294611,
292007,  289426,  286868,  284332,  281819,  279328,  276859,  274412,  271987,  269583,  267200,  264838,  262498,  260178,  257878,  255599,
253340,  251100,  248881,  246681,  244501,  242340,  240198,  238075,  235971,  233885,  231818,  229769,  227738,  225725,  223730,  221753,
219793,  217850,  215925,  214016,  212125,  210250,  208391,  206549,  204724,  202914,  201121,  199343,  197581,  195835,  194104,  192389,
190688,  189003,  187332,  185676,  184035,  182409,  180797,  179199,  177615,  176045,  174489,  172947,  171418,  169903,  168401,  166913,
165437,  163975,  162526,  161089,  159666,  158254,  156856,  155469,  154095,  152733,  151383,  150045,  148719,  147405,  146102,  144810,
143530,  142262,  141004,  139758,  138523,  137299,  136085,  134882,  133690,  132508,  131337,  130176,  129026,  127885,  126755,  125635,
124524,  123424,  122333,  121252,  120180,  119118,  118065,  117021,  115987,  114962,  113946,  112939,  111940,  110951,  109970,  108998,
108035,  107080,  106134,  105196,  104266,  103344,  102431,  101526,  100628,  99739,  98857,  97983,  97117,  96259,  95408,  94565,
93729,  92901,  92080,  91266,  90459,  89660,  88867,  88082,  87303,  86531,  85767,  85009,  84257,  83513,  82774,  82043,
81318,  80599,  79887,  79180,  78481,  77787,  77099,  76418,  75743,  75073,  74410,  73752,  73100,  72454,  71813,  71179,
70550,  69926,  69308,  68695,  68088,  67486,  66890,  66299,  65713,  65132,  64556,  63986,  63420,  62860,  62304,  61753,
61208,  60667,  60130,  59599,  59072,  58550,  58032,  57520,  57011,  56507,  56008,  55513,  55022,  54536,  54054,  53576,
53102,  52633,  52168,  51707,  51250,  50797,  50348,  49903,  49462,  49025,  48591,  48162,  47736,  47314,  46896,  46482,
46071,  45663,  45260,  44860,  44463,  44070,  43681,  43295,  42912,  42533,  42157,  41784,  41415,  41049,  40686,  40326,
39970,  39617,  39267,  38920,  38576,  38235,  37897,  37562,  37230,  36901,  36574,  36251,  35931,  35613,  35298,  34986,
34677,  34371,  34067,  33766,  33467,  33172,  32878,  32588,  32300,  32014,  31731,  31451,  31173,  30897,  30624,  30354,
30085,  29819,  29556,  29295,  29036,  28779,  28525,  28272,  28023,  27775,  27529,  27286,  27045,  26806,  26569,  26334,
26101,  25871,  25642,  25415,  25191,  24968,  24747,  24529,  24312,  24097,  23884,  23673,  23464,  23256,  23051,  22847,
22645,  22445,  22246,  22050,  21855,  21662,  21470,  21281,  21092,  20906,  20721,  20538,  20357,  20177,  19998,  19822,
19646,  19473,  19301,  19130,  18961,  18793,  18627,  18463,  18299,  18138,  17977,  17818,  17661,  17505,  17350,  17197,
17045,  16894,  16745,  16597,  16450,  16305,  16161,  16018,  15876,  15736,  15597,  15459,  15322,  15187,  15053,  14919,
14788,  14657,  14527,  14399,  14272,  14146,  14021,  13897,  13774,  13652,  13531,  13412,  13293,  13176,  13059,  12944,
12829,  12716,  12604,  12492,  12382,  12272,  12164,  12056,  11950,  11844,  11739,  11636,  11533,  11431,  11330,  11230,
11130,  11032,  10935,  10838,  10742,  10647,  10553,  10460,  10367,  10276,  10185,  10095,  10006,  9917,  9830,  9743,
9657,  9571,  9487,  9403,  9320,  9237,  9156,  9075,  8994,  8915,  8836,  8758,  8681,  8604,  8528,  8452,
8378,  8304,  8230,  8158,  8085,  8014,  7943,  7873,  7803,  7734,  7666,  7598,  7531,  7465,  7399,  7333,
7268,  7204,  7140,  7077,  7015,  6953,  6891,  6830,  6770,  6710,  6651,  6592,  6534,  6476,  6419,  6362,
6306,  6250,  6195,  6140,  6086,  6032,  5979,  5926,  5873,  5822,  5770,  5719,  5669,  5618,  5569,  5520,
5471,  5422,  5374,  5327,  5280,  5233,  5187,  5141,  5096,  5051,  5006,  4962,  4918,  4874,  4831,  4789,
4746,  4704,  4663,  4621,  4581,  4540,  4500,  4460,  4421,  4382,  4343,  4305,  4267,  4229,  4191,  4154,
4118,  4081,  4045,  4009,  3974,  3939,  3904,  3870,  3835,  3801,  3768,  3735,  3702,  3669,  3636,  3604,
3572,  3541,  3509,  3478,  3448,  3417,  3387,  3357,  3327,  3298,  3269,  3240,  3211,  3183,  3155,  3127,
3099,  3072,  3045,  3018,  2991,  2965,  2938,  2912,  2887,  2861,  2836,  2811,  2786,  2761,  2737,  2713,
2689,  2665,  2641,  2618,  2595,  2572,  2549,  2527,  2504,  2482,  2460,  2439,  2417,  2396,  2374,  2353,
2333,  2312,  2292,  2271,  2251,  2231,  2212,  2192,  2173,  2154,  2134,  2116,  2097,  2078,  2060,  2042,
2024,  2006,  1988,  1971,  1953,  1936,  1919,  1902,  1885,  1868,  1852,  1835,  1819,  1803,  1787,  1771,
1756,  1740,  1725,  1710,  1694,  1679,  1665,  1650,  1635,  1621,  1606,  1592,  1578,  1564,  1550,  1537,
1523,  1510,  1496,  1483,  1470,  1457,  1444,  1431,  1419,  1406,  1394,  1381,  1369,  1357,  1345,  1333,
1321,  1310,  1298,  1287,  1275,  1264,  1253,  1242,  1231,  1220,  1209,  1198,  1188,  1177,  1167,  1157,
1146,  1136,  1126,  1116,  1106,  1097,  1087,  1077,  1068,  1058,  1049,  1040,  1030,  1021,  1012,  1003,
994,  986,  977,  968,  960,  951,  943,  935,  926,  918,  910,  902,  894,  886,  878,  870,
863,  855,  848,  840,  833,  825,  818,  811,  804,  796,  789,  782,  775,  769,  762,  755,
748,  742,  735,  729,  722,  716,  710,  703,  697,  691,  685,  679,  673,  667,  661,  655,
649,  644,  638,  632,  627,  621,  616,  610,  605,  599,  594,  589,  584,  578,  573,  568,
563,  558,  553,  548,  544,  539,  534,  529,  525,  520,  515,  511,  506,  502,  497,  493,
489,  484,  480,  476,  471,  467,  463,  459,  455,  451,  447,  443,  439,  435,  431,  428,
424,  420,  416,  413,  409,  405,  402,  398,  395,  391,  388,  384,  381,  378,  374,  371,
368,  364,  361,  358,  355,  352,  349,  345,  342,  339,  336,  333,  330,  327,  325,  322,
319,  316,  313,  310,  308,  305,  302,  300,  297,  294,  292,  289,  287,  284,  282,  279,
277,  274,  272,  269,  267,  265,  262,  260,  258,  255,  253,  251,  249,  246,  244,  242,
240,  238,  236,  234,  232,  229,  227,  225,  223,  221,  219,  218,  216,  214,  212,  210,
208,  206,  204,  203,  201,  199,  197,  195,  194,  192,  190,  189,  187,  185,  184,  182,
180,  179,  177,  176,  174,  173,  171,  170,  168,  167,  165,  164,  162,  161,  159,  158,
156,  155,  154,  152,  151,  150,  148,  147,  146,  144,  143,  142,  141,  139,  138,  137,
136,  134,  133,  132,  131,  130,  129,  127,  126,  125,  124,  123,  122,  121,  120,  119
]]> http://alchy.org:443/alchy/index.php?entry=entry160923-102239 2016-09-23T00:00:00Z 2016-09-23T00:00:00Z Generate Server Cerfificate signed by Certificate Authority
#!/bin/bash
echo -n "enter servername:"
read SERVERNAME

# Create _2048bit_rsa_key_ for server
openssl genrsa -out ${SERVERNAME}.key 2048

# Generate a certificate signing request based on an existing certificate
openssl req -new -key ${SERVERNAME}.key -out ${SERVERNAME}.csr

# Sign csr with the CA private key using CSR you just made
openssl x509 -req -days 1825 -in ${SERVERNAME}.csr -CA cacert.pem -CAkey \
cakey.pem -CAcreateserial -out ${SERVERNAME}.crt

# Convert to PEM
openssl x509 -in ${SERVERNAME}.crt -out ${SERVERNAME}.pem -outform PEM

# Verify certificate
openssl x509 -in ${SERVERNAME}.crt -text -noout
]]> http://alchy.org:443/alchy/index.php?entry=entry160629-115322 2016-06-29T00:00:00Z 2016-06-29T00:00:00Z Moog Filter http://www.bernacomp.com/elec/og2/og3_moogladder.html

http://wby12p2ks.homepage.t-online.de/wrdprs/?cat=12]]> http://alchy.org:443/alchy/index.php?entry=entry160410-090245 2016-04-10T00:00:00Z 2016-04-10T00:00:00Z mbed/linraries https://developer.mbed.org/users/mimi3/code/SDFileSystemDMA/

FastPWM
https://developer.mbed.org/users/Sissors/code/FastPWM/

]]> http://alchy.org:443/alchy/index.php?entry=entry160401-115605 2016-04-01T00:00:00Z 2016-04-01T00:00:00Z MCU sine with offset in 10bit
unsigned int const sinetable[512] = {
1023,1022,1022,1022,1022,1022,1022,1022,1022,1022,1022,1022,1022,1022,1022,1021,
1021,1021,1021,1021,1021,1020,1020,1020,1020,1019,1019,1019,1019,1018,1018,1018,
1018,1017,1017,1017,1016,1016,1016,1015,1015,1014,1014,1014,1013,1013,1012,1012,
1011,1011,1010,1010,1009,1009,1008,1008,1007,1007,1006,1006,1005,1005,1004,1003,
1003,1002,1002,1001,1000,1000,999,998,998,997,996,996,995,994,993,993,
992,991,990,989,989,988,987,986,985,985,984,983,982,981,980,979,
978,977,977,976,975,974,973,972,971,970,969,968,967,966,965,964,
963,962,961,959,958,957,956,955,954,953,952,950,949,948,947,946,
945,943,942,941,940,938,937,936,935,933,932,931,929,928,927,926,
924,923,921,920,919,917,916,915,913,912,910,909,907,906,905,903,
902,900,899,897,896,894,893,891,889,888,886,885,883,882,880,878,
877,875,874,872,870,869,867,865,864,862,860,859,857,855,853,852,
850,848,846,845,843,841,839,838,836,834,832,830,828,827,825,823,
821,819,817,815,813,812,810,808,806,804,802,800,798,796,794,792,
790,788,786,784,782,780,778,776,774,772,770,768,766,764,761,759,
757,755,753,751,749,747,744,742,740,738,736,734,731,729,727,725,
723,720,718,716,714,711,709,707,705,702,700,698,695,693,691,689,
686,684,682,679,677,674,672,670,667,665,663,660,658,655,653,651,
648,646,643,641,638,636,633,631,628,626,624,621,619,616,614,611,
608,606,603,601,598,596,593,591,588,586,583,580,578,575,573,570,
567,565,562,560,557,554,552,549,546,544,541,538,536,533,530,528,
525,522,520,517,514,511,509,506,503,500,498,495,492,490,487,484,
481,478,476,473,470,467,465,462,459,456,453,450,448,445,442,439,
436,433,431,428,425,422,419,416,413,411,408,405,402,399,396,393,
390,387,385,382,379,376,373,370,367,364,361,358,355,352,349,346,
343,341,338,335,332,329,326,323,320,317,314,311,308,305,302,299,
296,293,290,287,284,281,278,275,272,269,266,263,259,256,253,250,
247,244,241,238,235,232,229,226,223,220,217,214,211,208,204,201,
198,195,192,189,186,183,180,177,174,170,167,164,161,158,155,152,
149,146,143,139,136,133,130,127,124,121,118,114,111,108,105,102,
99,96,93,89,86,83,80,77,74,71,68,64,61,58,55,52,
49,46,42,39,36,33,30,27,24,20,17,14,11,8,5,2
};



#include <stdio.h>
#include "sinetable.h"
#include <stdint.h>

int16_t get_sine(uint16_t position) {
   // @ inputs: position in wave 0 - 2047
   if(position < 1024) {
       if(position < 512) {
           // Q1
           //return(position);
           return(sinetable[position]);
       } else {
           // Q2
           position = 511 + (512 - position);
           //return(position);
           return( -1 * sinetable[position]);
       }
   } else {
       if(position < 1024 + 512) {
           // Q3
           position = -1 * (1024 - position);
           //return(position);
           return( -1 * sinetable[position]);
       } else {
           // Q4
           position = 1023 + 1024 - position;
           //return(position);
           return(sinetable[position]);
       }
   }
}

uint16_t sine_t_pos = 0; // sinetable position
uint16_t sine_s_ctr = 0; // sine speed counter

uint16_t get_scaled_sine(uint16_t offset, uint16_t speed, uint16_t modulation) {
    // @ input offset: 0 - 1023 /10bit/
    // @ input speed: 0 - 1023 /10bit/
    // @ input modulation: 0 - 1023 /10bit/
    // @ function output: 0 - 1023 /10bit/
    int32_t sine;

    if(sine_s_ctr < speed) {
        sine_s_ctr += 1;
    } else {
        sine_s_ctr = 0;
        if(sine_t_pos < 2047) {
            sine_t_pos++;
        } else {
            sine_t_pos = 0;
        }
    }
    sine = get_sine(sine_t_pos);
    sine = sine * (1 + modulation);
    sine = sine >> 11;
    sine = sine + offset;

    if(sine < 1024) {
        if(sine < 0) {
            return((uint16_t) 0);
        } else {
            return((uint16_t) sine);
        }
    } else {
        return((uint16_t) 1023);
    }
}


main(void) {

    uint32_t c, d;
    uint16_t sine;

    for(c=0; c<65535<<4; c++) {
        sine = get_scaled_sine(512, 1, 512);
        printf("sine: %d\n\r", sine);
    }
}
]]> http://alchy.org:443/alchy/index.php?entry=entry160318-154236 2016-03-18T00:00:00Z 2016-03-18T00:00:00Z Arduino Midi library port for mbed http://arduinomidilib.fortyseveneffects.com/index.html
https://developer.mbed.org/users/okini3939/code/MIDI/file/0eeca7deec08/MIDI.cpp

]]> http://alchy.org:443/alchy/index.php?entry=entry160315-141319 2016-03-15T00:00:00Z 2016-03-15T00:00:00Z Temperature coefficient PTC - positive resistance coefficient, resistance increases with temperature

Temperature coefficient: 50ppm/°C
Meaning that the change in value due to a temperature change of 1°C will not be more than 50Ω for every 1MΩ of the resistor's value (or 0.05Ω for every 1KΩ of its value).


Temperature coefficient: 2750K ppm/°C
Meaning that the change in value due to a temperature change of 1°C will not be more than 2750Ω for every 1MΩ of the resistor's value (or 2.75Ω for every 1KΩ of its value).
]]> http://alchy.org:443/alchy/index.php?entry=entry160103-102735 2016-01-03T00:00:00Z 2016-01-03T00:00:00Z Leftfield & Sleaford Mods - Head And Shoulders ]]> http://alchy.org:443/alchy/index.php?entry=entry160103-022531 2016-01-03T00:00:00Z 2016-01-03T00:00:00Z Standard EIA Decade Resistor Values Table http://www.logwell.com/tech/components/ ... alues.html]]> http://alchy.org:443/alchy/index.php?entry=entry160101-122804 2016-01-01T00:00:00Z 2016-01-01T00:00:00Z PyBBIO is a Python library for hardware IO support on the TI Beaglebone. https://github.com/graycatlabs/PyBBIO/wiki

(/usr/local/lib/PyBBIO/examples)

]]> http://alchy.org:443/alchy/index.php?entry=entry151220-021259 2015-12-20T00:00:00Z 2015-12-20T00:00:00Z BBB Beaglebone Essentials Wisdom for BBB
https://graycat.io/


Device tree overlay and support scripts for using most available hardware I/O on the BeagleBone without editing dts files or rebuilding the kernel
https://github.com/cdsteinkuehler/beaglebone-universal-io

A GUI for the BB universal IO
https://github.com/strahlex/BBIOConfig



https://www.youtube.com/watch?v=By9foc1iJ3Q

https://github.com/cdsteinkuehler/beaglebone-universal-io/blob/master/config-pin

http://beagleboard.org/static/PumpingSt ... s.pptx.pdf

rotary encoders pinout
https://graycat.io/blog/

]]> http://alchy.org:443/alchy/index.php?entry=entry151220-013843 2015-12-20T00:00:00Z 2015-12-20T00:00:00Z KiCad won't load footprints [fixed] IO_ERROR: http GET command failed
Cannot get/download Zip archive:

https://bugs.launchpad.net/kicad/+bug/1520376

fix:

https://raw.githubusercontent.com/KiCad/kicad-library/master/template/fp-lib-table.for-pretty
]]> http://alchy.org:443/alchy/index.php?entry=entry151209-222827 2015-12-09T00:00:00Z 2015-12-09T00:00:00Z Reflow Kit V3 PRO https://www.beta-estore.com/rkuk/order_product_details.html?p=624]]> http://alchy.org:443/alchy/index.php?entry=entry151129-102420 2015-11-29T00:00:00Z 2015-11-29T00:00:00Z Krabičky http://sesmil.pl/en-kontakt.html

http://www.ztc.cz/?go=odkazy&id=47

http://www.schroff.biz/frontpanelexpress/index.html

http://cz.rs-online.com/web/p/regalove- ... a/6657661/

http://cz.rs-online.com/web/p/lepici-dr ... -_-0609297
]]> http://alchy.org:443/alchy/index.php?entry=entry151114-092405 2015-11-14T00:00:00Z 2015-11-14T00:00:00Z Plechové krabičky přístrojové http://www.gme.cz/u-kk09-455-p072-203]]> http://alchy.org:443/alchy/index.php?entry=entry151108-213752 2015-11-08T00:00:00Z 2015-11-08T00:00:00Z BBB and serial communication https://learn.adafruit.com/setting-up-io-python-library-on-beaglebone-black/uart


http://bradsmc.blogspot.cz/2013/05/exam ... tween.html

import serial
import time
import datetime
import re

serial = serial.Serial("/dev/ttyO1", baudrate=38400)

resp = ""

while True:
        while (serial.inWaiting() > 0):
                data = serial.read()
                resp += data
                if "\r\n" in resp:
                        now = datetime.datetime.now()
                        timestamp = "%02d/%02d/%d %02d:%02d:%02d" % \
                        (now.month,now.day,now.year,now.hour,now.minute,now.second)
                        matchObj = re.match(r'\^([0-9A-F]+)\r\n', resp)
                        print matchObj.group(1)
                        resp = ""
                        serial.flush();
                        serial.write(matchObj.group(1) + " OK: " + timestamp + "\n")


Return the number of chars in the receive buffer.
http://pyserial.sourceforge.net/pyseria ... .inWaiting

]]> http://alchy.org:443/alchy/index.php?entry=entry150907-184832 2015-09-07T00:00:00Z 2015-09-07T00:00:00Z python: convert variable into listo of bytes >>> hex_str = "0xffff"
>>> list(struct.pack('!I', int(hex_str, 16)))
['\x00', '\x00', '\xff', '\xff']
>>> list(struct.pack('I', int(hex_str, 16)))
['\xff', '\xff', '\x00', '\x00']


list(bytearray(struct.pack('!I', int(hex_str, 16))))


>>> list(bytearray(struct.pack('!I', 65534)))
[0, 0, 255, 254]


>>> list(bytearray(struct.pack('!H', 65534)))
[255, 254]



x pad byte no value
c char string of length 1 1
b signed char integer 1 (3)
B unsigned char integer 1 (3)
? _Bool bool 1 (1)
h short integer 2 (3)
H unsigned short integer 2 (3)
i int integer 4 (3)
I unsigned int integer 4 (3)
l long integer 4 (3)
L unsigned long integer 4 (3)
q long long integer 8 (2), (3)
Q unsigned long long integer 8 (2), (3)
f float float 4 (4)
d double float 8 (4)
s char[] string
p char[] string
P void * integer (5), (3)
]]> http://alchy.org:443/alchy/index.php?entry=entry150906-231834 2015-09-06T00:00:00Z 2015-09-06T00:00:00Z Learn and Understand AngularJS
https://www.udemy.com/learn-angularjs/?couponCode=YOUTUBE119]]> http://alchy.org:443/alchy/index.php?entry=entry150807-073631 2015-08-07T00:00:00Z 2015-08-07T00:00:00Z BBB http://beaglebone.cameon.net/home/i2c-devices


PyBBIO, PinMux
https://github.com/graycatlabs/PyBBIO/wiki
https://github.com/graycatlabs/PyBBIO

Pinmux Map
http://www.element14.com/community/thre ... hread=true

]]> http://alchy.org:443/alchy/index.php?entry=entry150618-115106 2015-06-18T00:00:00Z 2015-06-18T00:00:00Z