# Wired And

#### Code

Joined Nov 29, 2005
3
Hello,

here's a little question about open colector and wired and.

vcc
|
R
|
----------> output
| |
\ \

| |
-- ---

Out = X Y

Question:

the output will be true when the circuit is closed (as in the figure) with the ground connections "closed". Is that correct?

Is the following correct?

- when they are all unconnected they dont send the 0 from the ground so the output gets the 1 from the Resistance

- when they are all connected they all send the 0 from the ground so the output is 0 because 0 goes above 1 in OC

- when one is connected it sends a 0 from the ground and the output is 0

Thanks.

#### beenthere

Joined Apr 20, 2004
15,819
Hi,

If you're using positive logic, than your two switches make a wired NOR function. The output is true wuth neither input, and is false if one or both is made. A OR B = notC.

#### Gorgon

Joined Aug 14, 2005
113
Originally posted by Code@Dec 9 2005, 05:50 PM
Hello,

here's a little question about open colector and wired and.
Out = X Y

Question:

the output will be true when the circuit is closed (as in the figure) with the ground connections "closed". Is that correct?

Is the following correct?

- when they are all unconnected they dont send the 0 from the ground so the output gets the 1 from the Resistance

- when they are all connected they all send the 0 from the ground so the output is 0 because 0 goes above 1 in OC

- when one is connected it sends a 0 from the ground and the output is 0

Thanks.
[post=12334]Quoted post[/post]​
Hi,
This is an AND gate. The function is Out=X AND Y.

If both X AND Y is connected then Out is high(+V), and only then!

TOK 