To design 3:8 decoder using logic gate (3 bit binary number to octal number)
At the end of this experiment students are able to
LO1: Define decoder and its significance.
LO2: Construct truth table of 3:8 decoder
LO3: Design combinational logic circuit using logic gates
LO4: Elaborate applications of decoder
Software implementation: Use of any digital circuit simulator or use online simulator www.falstad.com/circuit/
Hardware implementation: Digital trainer kit, IC74LS11-3 numbers, IC7400-1nos
A decoder is a combinational logic circuit which is used to change the code into a set of signals. It is the reverse process of an encoder. A decoder circuit takes multiple inputs and gives multiple outputs. A decoder circuit takes binary data of ‘n’ inputs into ‘2^n’ unique output. In addition to input pins, the decoder has a enable pin. This enables the pin when negated, makes the circuit inactive. in this article, we discuss 3 to 8 line Decoder and Multiplexer.
To understand theory of decoder refer video attached
Truth Table 3:8 decoder
To simulate above circuit, you can use any software with digital logic elements.
Use following website for design https://www.falstad.com/circuit/circuitjs.html
Here one such online simulator is given in following link with total simulation of 2:4 decoder.
By changing inputs, check respective output as per truth table (2:4 decoder)
Students should design 3:8 decoder in same online circuit software and have to paste link in following google give in question and answer:
Simulate 3:8 decoder using https://www.falstad.com/circuit/circuitjs.html this software and upload link in following google form.
It also have questions and answers in quiz form which will be counted for your grades