The binary value to be loaded into the counter is applied to inputs D 0 to D 3 and a logic 0 pulse is applied to the PL input. This logic 0 is inverted and applied to one input of each of the eight NAND gates to enable them. If the value to be loaded into a particular flip-flop is logic 1, this makes the inputs of the right hand NAND gate 1,1 and due to the inverter between the pair of NAND gates for that particular input, the left hand NAND gate inputs will be 1,0. See below for the rules for rounding when performing arithmetic operations with numbers with a given precision. Significant digits examples Digits beyond the required or supported precision. E.g. figures introduced by division or multiplication or measurements reported to a greater precision than the measurement equipment supports. here the leading zero is dropped via rule #1, the zero between 2 and 5 is preserved as it is between two significant digits and the trailing zero is preserved as it is to the right of the decimal point (both following rule #2) The following table contains examples of applying the significant digits rules above in a variety of cases that cover everything you should see in practice. Examples with a different number of significant figures Original number

Each light emitting diode (called a segment) is illuminated using an electrical current, and by illuminating various combinations of segments so that some segments will be turned “ON” and emitting light while others will be turned “OFF” we can display individual characters or numbers. If M = 0 and M bar = 1, then the AND gates 1 and 3 in fig. will be enabled whereas the AND gates 2 and 4 will be disabled. While an LED segment can be illuminated individually as required, one terminal of each internal LED is connected to a common point or node. Thus instead of having 14 connecting pins for the display we will only have only eight (7 + 1) pins, one each for the seven individual LEDs plus a common pin, and it is this “common pin” which identifies the type and name of 7-segment display. LibreOffice 4 displays the character count in the status bar at the bottom of the program, along with the word count. For a detailed character count, select the TOOLS menu and then WORD COUNT. A dialogue box will appear containing the character count.The 74LS90 BCD Counter is a very flexible counting circuit and can be used as a frequency divider or made to divide any whole number count from 0 to 9 for a single display.

Consider what words to use in your post, and which words can be substituted with something shorter. Because the first time Q 1 and Q 3 are both at logic 1 during a 0 to 15 10 count is at a count of ten (1010 2), this will cause the counter to count from 0 to 9 10 and then reset to 0, omitting 10 10 to 15 10.While common PR and CLR inputs can produce outputs of 0000 or 1111, a PARALLEL LOAD ( PL) input will allow any value to be loaded into the counter. Using a separate DATA input for each flip-flop, and a small amount of extra logic, a logic 0 on the PL will load the counter with any pre-determined binary value before the start of, or during the count. A method of achieving asynchronous parallel loading on a synchronous counter is shown in Fig. 5.6.14. Load Operation

At Facebook, users upload and post new photos every day. When uploading pictures, users may need to write a description, which is less than 63,206 characters. Once uploaded, few friends will comment about the post, which should give them a character limit of 8000 characters. Note also that while we have used here the TTL 74LS47 BCD to 7-segment decoder/driver IC with its active LOW (current sink) outputs for driving a common anode display, the TTL 74LS48 BCD to 7-segment decoder/driver IC is exactly the same except that it designed to drive a common-cathode display as it produces active HIGH (current source) outputs.Depending on the way in which the counting progresses, the synchronous or asynchronous counters are classified as follows −

Select the TOOLS menu and then WORD COUNT. A dialogue box will appear containing the character count. The Large Digit LED COUNTERS are also called TOTALISERS, where from an input signal they will count UP either to the maximum range of the counter, or they can be programmed to STOP at a predetermined value and provide an output via a Relay, for example, to start another related operation. The Large LED Counter can continue to count up after that event or it can be RESET.Rounding with a given precision based on decimal places differs from rounding to the same precision of significant figures. Examples of rounding of the number 12.345 are presented in the table below. Rounding 12.345 to different levels of precision Rounding precision ( n) Operation of four switches S A, S B, S C and S D, will generate the necessary input sequence to activate the appropriate LED segments responsible for displaying the corresponding number. For normal operation, the LT (Lamp test), BI/RBO (Blanking Input/Ripple Blanking Output) and RBI (Ripple Blanking Input) of the 74LS47 are all connected to the +5V supply (HIGH). Thus the numbers displayed are as follows: 7-segment Display Numbers Numbers are often rounded to a specified number of significant figures for practicality, e.g. to present in a news broadcast or to put down in a table neatly. Rounding a number to n significant figures happens in a similar way to rounding to n decimal places, with an important difference. We start by counting from the first non-zero digit for n significant digits and then round the last digit. However, we do not fill in the remaining places to the right of the decimal point with zeroes. One downside? Counters only support integers. That means decimals and fractions are out of the question. We’d have to display the integer part and fractional part separately somehow. Can we animate decimals?