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Questions tagged [not-gate]

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2 votes
6 answers
1k views

How can I 'invert' a 24 VDC signal

I have a 24 VDC 'signal' coming from the same line a solenoid is being supplied from. This signal comes from a PLC. I have the need to take this signal and 'invert' it, so it can be used to drive ...
user3263740's user avatar
1 vote
1 answer
120 views

Using a CPU fan to drive a MOSFET on/off

Mechanical Engineering student here. I am attempting to build my own positive air pressure respirator using a vacuum motor. I have a little CPU fan to put at the exit vent of the respirator to detect ...
Logan Klingler's user avatar
11 votes
3 answers
3k views

Why do logic gates need multiple MOSFETs?

I've just started learning about physics and electronics, and right now I'm learning about creating logic gates with CMOSFETs (Complementary MOSFETs). I'm interested in this because I'm a "high-...
Hessi-Dude's user avatar
-1 votes
2 answers
200 views

Higher input voltage to a not gate

Consider a digital not gate which its input range is 5V (5V and near considered 1 and 0V and near considered 0). What happens if we give an input of say 6.25V? Since this is component dependent: What ...
Parsa Noori's user avatar
0 votes
2 answers
119 views

Why are the resistors compulsory in this circuit? [duplicate]

When I use resistors, my circuit is working fine but if I remove them, then the LEDs in my circuit don't work anymore. As seen here the switch just sends high (red) voltage ahead Can you please ...
Amsy's user avatar
  • 11
0 votes
1 answer
177 views

How to amplify low voltage back up to supply level

I have a voltage supply that provides 6 V. The voltage gets run through a complex series of transistors, and the output is around 1.5 V. This is too low for the rest of my circuit to work with. In ...
user118995's user avatar
0 votes
1 answer
69 views

Sn74hct04n - always pulls to Ground

I have a very simple circuit in which I make use of an SN74HCT04N logic inverter to pull a line to GND when a button on 5V is pressed. You can see the circuit in my, unfortunately very bad, drawing. ...
siliconchris's user avatar
0 votes
1 answer
450 views

A simple circuit of NOT using a buffer

First of all, I am new to the area of electronics and I want some help to stuff that may sound to you a little obvious. I've seen a circuit using transistor that is used as a NOT logic gate, as in the ...
Anastassis Kapetanakis's user avatar
0 votes
1 answer
2k views

How does ground affect a circuit with a diode, connected to the power source which is connected to a ground and an LED for it to act like a NOT gate?

I was searching for a way to use diodes to make a NOT gate. I found a circuit online and simulated it in an application. The configuration has a battery (1),where the negative terminal is connected to ...
Quesdif's user avatar
0 votes
2 answers
199 views

What's wrong with this circuit?

Hello stack community! I've just started to learn about logical gates for my university course. I'm trying to design and run a simple circuit with not gates in Proteus as below: But I'm facing with ...
Amir's user avatar
  • 11
3 votes
2 answers
522 views

Why are two transistors or one transistor and a resistor used for a NOT gate?

We use one n-type and one p-type MOS transistor for a NOT gate or one transistor and one resistor. Why can't we use one transistor only without a resistor?
Ganesh Rathod's user avatar
7 votes
4 answers
3k views

How can I make an XOR gate with basic components?

I am a very beginner in logic gates and electronic etc. I am trying to make an XOR gate only with the help of some basic components like transistors in the NI Multisim simulator. I have use AND and ...
KAMRAN HASSAN's user avatar
0 votes
1 answer
510 views

Is a resistor compulsory in a NOT gate made from an NPN transistor?

I am making a NOT gate using a BC337/BC547A transistor (tried both) and I have made this circuit (image shown below) using a simulator: This is working properly. However when I remove the resistor R1,...
KAMRAN HASSAN's user avatar
2 votes
1 answer
125 views

what kind of transistor is this?

I'm just beginning to understand a bit about transistors and wanted to build my own NOT gate with what i thought was an NPN Transistor. When it didn't work I thought maybe i had the pins mixed up and ...
Jeffery Springs's user avatar
0 votes
1 answer
754 views

NOT gate power consumption

Given this NOT gate schematic using a transistor, and assuming the power supply is a battery, won't flow from Vcc to ground discharge the battery when the transistor is on? If yes, are there any ...
Telmo Marques's user avatar

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