A
a.h e.j
Guest
hello every one
why supply0 is stronger than pull1?
regard
why supply0 is stronger than pull1?
regard
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A
a.h e.j
Guest
thanks Gabor. you are very good adviser.
it's Obvious pull1 win. but my teacher says no supply0 win. i confused.
regard
it's Obvious pull1 win. but my teacher says no supply0 win. i confused.
regard
G
Gabor
Guest
On 3/2/2014 2:48 AM, a.h e.j wrote:
There's a hint in the names. "supply" indicates a voltage supply.
Think of this like a wire directly connected to the + or - output
of your system power supply (Vcc or Gnd). "pull" indicates a
pull-up or pull-down. Think of this like a 1K resistor to Vcc or
Gnd. Now if you had a 1K resistor to Vcc (pull1) and a wire
connected directly to Gnd (supply0) which would win?
--
Gabor
hello every one
why supply0 is stronger than pull1?
regard
There's a hint in the names. "supply" indicates a voltage supply.
Think of this like a wire directly connected to the + or - output
of your system power supply (Vcc or Gnd). "pull" indicates a
pull-up or pull-down. Think of this like a 1K resistor to Vcc or
Gnd. Now if you had a 1K resistor to Vcc (pull1) and a wire
connected directly to Gnd (supply0) which would win?
--
Gabor
A
a.h e.j
Guest
On Monday, March 3, 2014 6:48:58 AM UTC-8, gabor wrote:
thanks for good fonts and Description
i think 3.3v short to gnd in theory it's wrong but in practical i don't know mabye i guess 0v
a.h e.j wrote:
thanks Gabor. you are very good adviser.
it's Obvious pull1 win. but my teacher says no supply0 win. i confused.
regard
A picture might help, let's see if this looks reasonable:
+3.3V ----/\/\/\/----- pull1
1K Ohm
0V ------------------- supply0
Imagine the "----" are wires and the "/\/\/\" are resistors.
As drawn, the voltage at pull1 is 3.3V, and the voltage
at supply0 is 0V. Now let's short these two nets together:
+3.3V ----/\/\/\/---+-- pull1
1K Ohm |
|
0V -----------------+-- supply0
Now we've merged nets pull1 and supply0. What's the voltage on
the merged net?
(this is best viewed using a fixed width font like Courier)
--
Gabor
thanks for good fonts and Description
i think 3.3v short to gnd in theory it's wrong but in practical i don't know mabye i guess 0v
G
GaborSzakacs
Guest
a.h e.j wrote:
A picture might help, let's see if this looks reasonable:
+3.3V ----/\/\/\/----- pull1
1K Ohm
0V ------------------- supply0
Imagine the "----" are wires and the "/\/\/\" are resistors.
As drawn, the voltage at pull1 is 3.3V, and the voltage
at supply0 is 0V. Now let's short these two nets together:
+3.3V ----/\/\/\/---+-- pull1
1K Ohm |
|
0V -----------------+-- supply0
Now we've merged nets pull1 and supply0. What's the voltage on
the merged net?
(this is best viewed using a fixed width font like Courier)
--
Gabor
thanks Gabor. you are very good adviser.
it's Obvious pull1 win. but my teacher says no supply0 win. i confused.
regard
A picture might help, let's see if this looks reasonable:
+3.3V ----/\/\/\/----- pull1
1K Ohm
0V ------------------- supply0
Imagine the "----" are wires and the "/\/\/\" are resistors.
As drawn, the voltage at pull1 is 3.3V, and the voltage
at supply0 is 0V. Now let's short these two nets together:
+3.3V ----/\/\/\/---+-- pull1
1K Ohm |
|
0V -----------------+-- supply0
Now we've merged nets pull1 and supply0. What's the voltage on
the merged net?
(this is best viewed using a fixed width font like Courier)
--
Gabor