Breadboard Dimensions for making DIP PCB
Given the lack of actual measurements thus far, I've decided to upload some measurements of my own.  I used a ruler and a magnifier because I don't have anything more accurate, but I verified the measurements by pulling some pins out of a .1" header and test fitting it in the measurements indicated.


| BB  | A  | B  | C  | D  | E  | 1  | 2  | 3  | 4  | R4 |
|-----|----|----|----|----|----|----|----|----|----|----|
| Top | .3-| .1 | .4 | .3 | .3 | .2-| .4 | .2 | .2 | 0  |
| 2nd | NA | .1 | .4 | .3 | .3 | .2 | .4 | .2 | .3 | inf|
| 3rd | .2+| .15| .4 | .3 | .3 | .2 | .4 | .2 | .3 | inf|
| Bot | .3-| .1 | .4 | .3 | .3 | .2-| .4 | .2 | .2 | 0  |


A measurement like .3- means that it was slightly smaller than .3, but not .25 or .3.
Measurement 4 is the distance between the center two power rails (notice that it's different on the middle 2), and R4 is the resistance between the top and bottom of the measurement.

The breadboards I used are shown in the following picture, numbered 1 (on the bottom) to 4.



The one on top of the stack is from RSR, the next is a couple old 3M Super Strips.  I think that the third might be a Twin Industries model, but I don't know that.  It and the bottom one were purchased by my school and the guys who would know where they're from don't get back until Monday.

I'd love to have some Twin Industries, Parallax, Global Specialties, Sparkfun, Seeedstudio, and Adafruit measurements. I'm about ready to just email all of those manufacturers and ask them to take some calipers out to the warehouse, but I feel bad asking for that kind of a favor without intending to buy one of them.