BCD to. 7-Segment. Decoder. January DM74LS BCD to 7-Segment Decoder. General Description . This datasheet has been downloaded from: www. 74LS48, 74LS48 Datasheet, 74LS48 pdf, buy 74LS48, 74LS48 BCD to 7- Segment Decoder. The integrated TTL (74LS48) is a BCD decoder/driver to seven segments common cathode display.

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It was designed to sink current when using common anode 7-segments LED. Then just map the pins correctly again, from datasheet: Nov 20, 9. If I am reading it right. Paper is Lambertian in its reflective characteristics, which is one of the reasons it is so easy to read compared to contemporary digital dztasheet technologies.

I have learnt about the and The transistor is not correct. On the other hand, when outputting a logic LO, the output is seldom more than a few hundred millivolts above ground, which is a much more reliable drive signal not to mention the higher current capacity. Research this and be prepared to discuss it with 74488 students as an example of a novel approach for non-emissive electronic displays.

Digital Display Circuits

The is obsolete. A microcontroller can be programmed to perform the binary to decimal conversion and then use a look-up chart to perform the segment conversion. The student using the has an even worse problem: No, create an account now. 748 seems that this IC does exactly the opposite of what you would want it to do. An Introduction to Digital Signal Processing This article will cover the basics of Digital Signal Processing to lead up to a series of articles on statistics and probability used to Explain what advice you would give to him.


A friend of yours is trying to build his own Nixie tube display circuit, but is experiencing problems. Both have checked and re-checked their wiring, to no avail. Exploit the convenience inherent to your science, and get those students of yours practicing their math on lots of real circuits! This package accepts a positive-logic Binary Coded Decimal BCD input and converts it to the proper pattern necessary to illuminate a 7 segment display. Wierd smartphone is comming alive Posted by Bobvayne in forum: Another reason for following this method of practice is to teach students scientific method: Learning to analyze digital circuits requires much study and practice.

But most of us plan for our students to do something in the real world with the education we give them. I highly recommend CMOS logic circuitry for at-home experiments, where students may not have access to a 5-volt regulated power supply. Once again, manufacturer datasheets contain a wealth of information, and your students will learn much by researching them.

In this method, the microcontroller would send Datashee binary coded decimal on 748 output pins to the chips.

Read the datasheet for this device, then comment on why you think a serial rather than parallel data input format was chosen. Describe what this feature devoder, and why it is used. The root of this question is little more than binary-to-hexadecimal conversion, but it also introduces students to the concept of controlling bit states in microcomputer ports by writing hex values.


Oct 2, 17, 5, In most sciences, realistic experiments are much more difficult decorer expensive to set up than electrical circuits.

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Posted by ljbp in forum: If you’re kind enough to send me your address I can send you some. I’ve connected a decoder to 7-segment display as shown in figure. Indeed, it just so happens decoeer Exclusive-OR gates do the trick quite nicely:. Which of these two approaches do you suppose would yield the simplest gate circuitry overall? How Sensor Fusion Works Sensor fusion is the art of combining multiple physical sensors to produce accurate “ground truth”, even though each sensor might be A line selector an additional output line on the microcontroller could select which chip to target and cycle through the set of displays to produce the overall numeric output.

One way you can save time and reduce the possibility of decodwr is to begin with a very simple circuit and incrementally add components to increase its complexity after each analysis, rather than building a whole new circuit for each practice problem.

The timing diagram and description in the datasheet should provide plenty of information for determining how to send data to the display using this IC. They also need real, hands-on practice building circuits and using test equipment.