Digital logic electronics basics:
Electronic circuits can easily process signals that are in one of 2 conditions. Many well known digital integrated circuits (ICs) operate from a 5 volt power supply. Therefor, the input(s) of those ICs typically sense whether the voltage applied to them is near the negative side of the supply voltage of 0V (Low/0/Off/False) or the positive side of the supply voltage 5V (High/1/On/True). The output then, responds accordingly by outputting a high or low signal. How the output responds, depends on the circuitry connecting everything, which is categorized into different “logic gates”.
Commonly used terms for the 2 digital signal states:
- High signal – On – 1 – True – (These terms are commonly used to indicate close to 5 volts)
- Low signal – Off – 0 – False – (These terms are typically used to mean close to 0 volts)
https://www.amazon.com/shop/electronzapdotcom Mostly products used in my videos.
https://www.youtube.com/electronzap Also, please subscribe to my YouTube channel!
Become a Patron! And of course, donations help a ton!
Basic logic gates:
- NOT (only one input) – Output High, only if input is low.
- AND – Output high, only if all inputs are high.
- OR – Output High, if one or all inputs are high.
- NAND – Output low, if all inputs are high.
- NOR – Output low, if any inputs are high.
- XOR – (2 inputs) Output high only when one input is high and the other input is low.
- XNOR – (2 inputs) Output low only when one input is high and one input is low.
NAND = Not AND NOR = Not OR
XOR = Exclusive OR XNOR = Exclusive NOR
- Active low (low-true).
- Boolean logic
- Diode logic
- TTL – transistor transistor logic – always 5V (3-5V high)
- CMOS – Complimentary Metal Oxide Semiconductor
- Assertion level logic
- Open collector
- ADCs – Analog to digital converters
- DACs – Digital to analog converters
Ways to support this website and disclaimer:
- https://www.youtube.com/electronzap above all, please subscribe to my YouTube channel!
- After that, any donations will help me update this site faster and to make more diagrams! https://www.patreon.com/electronzap
- In addition, as an Amazon Associate I earn from qualifying purchases https://www.amazon.com/shop/electronzapdotcom
- And as always. This website, and all else I do, is for informational purposes only. Any actions you take are at your own risk.