I am looking for inexpensive keypads to use in class. I need between 12 and 25 units so low price is important. I have checked at electronic goldmine, allelectronics, alltronics, and mpja. The only real canadate so far is . From alltronics.com for $1. There is noi nfo regarding what if any electronics it contains. It looks like the cable has nine conductors which would make sense for a 4x5 raw matrix.
**broken link removed**
If you know of a better unit at about the same price or some reason to stay away from this one I would like to know.
Thanks 3v0