Questions tagged [decoder]
A decoder is an electronic signal processing circuit, which takes as an input a binary number, and turns on a corresponding pin accordingly. It takes `n` inputs (which can all be either on or off) and outputs `2^n` outputs of which exactly one is on
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Why does 74x138 have 3 EN and why does it have to be 1 EN active high and 2 active low?
I don't understand why does 74x138 have 3 EN? And why does it have to be 1 EN active high and 2 active low?
I understand needing one enable pin if you need to turn on off a decoder or maybe use to ...
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CMOS 4022 feasibility to divide by smaller integer using only simple R,C combination to reset?
The CMOS CD4022 is a divide-by-8 counter with 8 decoded outputs, pinout attached below. Now suppose I want to use the 4022 to divide by 4 instead of 8.
Can I just put a capacitor from the '4' output ...
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Determining the function of an 8x1 multiplexer and implementing it using a decoder
Express the function implemented by the given circuit as a sum of minterms and write the result in decimal notation in the form F = Σm(...). Then, draw the circuit that implements the same function ...
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Random increment on button press for a counter using CD4029 and 555 timer
It works well in Proteus (Simulation), but when I implement it, it doesn't work. I'm sure that the hardware connections are correct. Also, the 7-segment doesn't display, for example, the number 2 ...
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I'm trying to build a counter system (easy one), but the circuit doesn't work
I'm using Proteus to test a circuit before implementing it practically, but it doesn't work. I'm supposed to build a counter that is displayed in a 7 segment display, using a 555 timer. The counter is ...
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How can I use 433MHz RF Modules and HT12E/HT12D to create a wireless remote control system to control a DC motor?
I would like to create my own battery-powered remote control with 433MHz RF modules using the HT12E and Ht12D encoder and decoder to control the rotation of a DC motor. However, I am not sure of the ...
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Why are my LEDs not behaving properly upon wiring them to the outputs of my 74LS47 decoder? [closed]
Everything works properly in terms of logistics. I wired the inputs as LLHL following the truth table of the datasheet of the decoder (inputs are wired properly). Then I wired left LED to g and right ...
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Is it possible to display values from a PRBS7 shift register to three, 7-segment displays (no Arduino or microcontrollers)?
I have a CD4015 lsfr connected to a CD4030 XOR gate, which implements a PRBS7 sequence. My goal is to display the current value of the 7-bit output using the output pins of A and B of the CD4015. I ...
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Using MOSFET to Control 2 LEDs Separately from Same 12V Source
I am trying to control 2 LEDs from a model railway decoder. The decoder has a common positive terminal (+12 V).
The decoder also has a two negative terminals - one I have called FL and the other I ...
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Linking the PT2262 and PT2272 ICs by either normal laser light or four infrared channels
Can the PT2262 and PT2272 ICs be linked together by normal or infrared laser light, or are they only designed for wireless communication?
If they can be, what is the way to do this?
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Does this Verilog HDL code of a decoder look strange in any way?
I am wondering if it is ok to use output instead of wire for another output in Verilog coding (using Quartus for this). Just ...
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Why is memory addressed using 2 address decoders only and not more? [duplicate]
I am currently taking a university course about computer architecture in which we learned basic DRAM architecture and addressing. As far as I know, each latch is selected using decoder outputs to ...
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Decoding Bit Rate Information for an LED Project Using a Logic Analyzer
I am currently working on a project where I'm trying to understand and decode the bit rate information being sent to an LED. I purchased an LED for my backyard that can be changed to different colors ...
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Understanding decode stage of x86 fetch-decode-execute pipeline and its (lack of) register requirements
FDE pipeline has register requirements for the F & D stages: For fetching an instruction from memory, the instruction pointer register points to the memory location of the next instruction to be ...
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How to display 2-digits data using two 7447 decoder?
I have designed a circuit to display the 2-digits data using two 7447 decoder. The design is shown below.
I have two outputs, O1 and O2. O1 represents the ones digit while O2 represents the tenths ...
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