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I am not talking about the unused inputs. I am talking about the inputs that are manually set to high or low manually, from a dip switch. When the switch is open, the input it's undefined. I am talking about the inputs that at some point will be high.
Then if I want to build larger projects, what should I do? I learn and follow youtube projects and people there manage to build for instance, a 4 bit full adder, with no input resistors. But I have problems while doing that. ICs even turn from positive logic to negative logic when input is...
You were right. I was talking about this ICs : SN74LS86A or SN74LS32 which needds to have a low input voltage (not floating) vs CD4011B which can work with floating low input. The first are TTL and the last nand gate is cmos. I guess I was just ignorant enough to believe that TTL chips are not...
It does not matter what kind of gate, nor, or, xor, nand etc. What I mean is : an input takes 0 or 1. Low or high. For most gates, low is between 0 and ~1V. High is ~3...5V. I use dip switches to turn the inputs high. But if I don't connect the input to (-) rail through a resistor when I turn...
Hello there.
I have one question that buggs me.
Why for some ICs, you need to connect the A/B logic gate inputs to the ground (-) through a rezistor for the output to come out right, and for some others you can just plug the (+) rail into the input and you get the right output?
Thanks.
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