Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high log

Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high log

Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high logic/state & 0 for low logic/state ?

What is right ?

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

1s and 0s are logic states "true and not true", they can be defined by any voltage you like, though it is common to define a 1 as > .5 Vcc and a 0 as < .5 Vcc.
Frank

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

Details here
https://en.wikipedia.org/wiki/Logic_level

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

then ......... what should be right ?

1 for high voltage & 0 for low voltage OR 1 for high logic/state & 0 for low logic/state ? ?????

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

1s and 0s are logic states "true and not true", they can be defined by any voltage you like. I have worked on a logic unit where a "1" was -50V and a "0" was earth (0V). For families of logic TTL,CMOS etc. it is customary to use the true (1) is ~ Vcc and false (0) is ~0V.
Frank

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

no reply from KAK yet

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

1 and 0 represent logic states and are binary values.
Depending on the logic family used they can represent a range of voltages that results in a digital result of 1 or 0

There is a graph http://www.interfacebus.com/voltage_threshold.html
showing the threshold levels for a few logic families

You can also read tutorials like the following


Alex

Re: Digital signals (supplies) : 1 for high voltage & 0 for low voltage OR 1 for high

As alexan_e wrote...
1 and 0 are bit values ( binary digit values) and they represent logic states "true" and "not true".

Boolean algebra deals with the values 0 and 1.
These can be thought of as two integers,
or as the truth values false and true respectively.
In either case they are called bits or binary digits.
A bit is the minimum amount of information that we can imagine,
since it only stores either value 1 or 0, which represents either YES or NO,
activated or deactivated, true or false, etc...
that is: two possible states each one opposite to the other, without possibility of any shades.

So, if you say...
1 for high voltage & 0 for low voltage

It is right.

and this means that , when converting a bit value to a voltage value OR a voltage value to a bit value
bit value = 1 represent voltage value "high voltage"
bit value = 0 represent voltage value "low voltage"

Example: If "low voltage" < 100Volts < "high voltage"
then bit 0 represent all voltage values < 100V and bit 1 represent all voltage values > 100V
ie. NOT TRUE = voltage < 100V and TRUE = voltage > 100V

and, if you say...
1 for high logic/state & 0 for low logic/state

It is right.

and this means that , when converting a bit value to a logic/state OR a logic/state to a bit value
bit value = 1 represent " high logic/state"
bit value = 0 represent "low logic/state"

Example: If "low logic/state" < 2V < "high logic/state"
then bit 0 represent "all logic/states" < 2V and bit 1 represent "all logic/states" > 2V
ie. NOT TRUE = voltage < 2V and TRUE = voltage > 2V