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  2. Approximate counting algorithm - Wikipedia

    en.wikipedia.org/wiki/Approximate_counting_algorithm

    For example, in base 2, the counter can estimate the count to be 1, 2, 4, 8, 16, 32, and all of the powers of two. The memory requirement is simply to hold the exponent . As an example, to increment from 4 to 8, a pseudo-random number would be generated such that the probability the counter is increased is 0.25.

  3. Two-out-of-five code - Wikipedia

    en.wikipedia.org/wiki/Two-out-of-five_code

    2 of 5 barcode (non-interleaved) POSTNET barcode. A two-out-of-five code is a constant-weight code that provides exactly ten possible combinations of two bits, and is thus used for representing the decimal digits using five bits. [1] Each bit is assigned a weight, such that the set bits sum to the desired value, with an exception for zero.

  4. Gray code - Wikipedia

    en.wikipedia.org/wiki/Gray_code

    The most significant digit is an exception to this: for an n-bit Gray code, the most significant digit follows the pattern 2 n-1 on, 2 n-1 off, which is the same (cyclic) sequence of values as for the second-most significant digit, but shifted forwards 2 n-2 places. The four-bit version of this is shown below:

  5. List of algorithms - Wikipedia

    en.wikipedia.org/wiki/List_of_algorithms

    An algorithm is fundamentally a set of rules or defined procedures that is typically designed and used to solve a specific problem or a broad set of problems.. Broadly, algorithms define process(es), sets of rules, or methodologies that are to be followed in calculations, data processing, data mining, pattern recognition, automated reasoning or other problem-solving operations.

  6. Double dabble - Wikipedia

    en.wikipedia.org/wiki/Double_dabble

    The algorithm operates as follows: Suppose the original number to be converted is stored in a register that is n bits wide. Reserve a scratch space wide enough to hold both the original number and its BCD representation; n + 4×ceil(n/3) bits will be enough.

  7. 555 timer IC - Wikipedia

    en.wikipedia.org/wiki/555_timer_IC

    A second resistor in parallel, the new timing is half the table time. A second resistor in series, the new timing is double the table time. 2.5 ms (0.25x) ≅ 100 nF and 22.75 kΩ (four 91 kΩ resistors in parallel), 5 ms (0.5x) ≅ 100 nF and 45.5 kΩ (two 91 kΩ resistors in parallel), 10 ms (1x) ≅ 100 nF and 91 kΩ (values from table),

  8. Binary-coded decimal - Wikipedia

    en.wikipedia.org/wiki/Binary-coded_decimal

    Many non-integral values, such as decimal 0.2, have an infinite place-value representation in binary (.001100110011...) but have a finite place-value in binary-coded decimal (0.0010). Consequently, a system based on binary-coded decimal representations of decimal fractions avoids errors representing and calculating such values.

  9. Bit-reversal permutation - Wikipedia

    en.wikipedia.org/wiki/Bit-reversal_permutation

    [2] [10] An alternative to these techniques is special computer hardware that allows memory to be accessed both in normal and in bit-reversed order. [ 12 ] The performance improvement of bit-reversals in both uniprocessor and multiprocessors has been paid a serious attention in high-performance computing fields.