If, like I did, you swiped a bunch of 7400 chips from your first lab course in digital logic (for the countless hours spent hunched over those damned circuits, you deserve more than just a lousy grade, dammit), they're probably sitting around somewhere, not being used. Why? Because you don't remember all the pin-outs for those worthless things any more than you remember what the four types of flip-flops are. Of course, if you had some kind of handy reference, you could use these chips to build all kinds of useful logic circuits; like one that could turn on the hard drive LED on your tower when the last digit of your digital clock is a 7.

So without further ado, here are the pin-outs for various 7400 TTL chips:

Legend:

```-,| = single wire
= = two or more wires
G = logic gate

gnd
14  12  10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
|   | | | | | | |
|   --=G- --=G- |
| --=G- --=G-   |
| | | | | | |   |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V

7404 - Hex Inverter

gnd
14  12  10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
|   | | | | | | |
|   -G- -G- -G- |
| -G- -G- -G-   |
| | | | | | |   |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V

7410 - Triple 3-input NAND
7411 - Triple 3-input AND

gnd
14  12  10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
|   | | | | | | |
| --=G- --===G- |
| | | --===G-   |
| | | | | | |   |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V

gnd
14  12  10
| 13| 11| 9 8
|-|-|-|-|-|-|-|-|
|               |
|               |
| | | |         |
|-|-|-|-|-|-|-|-|
1 2 3 4 5 6 7
+5V

```
Under Construction... fuckin <pre> tag is a pain in the ass