Anyone know of a cheap source for 3 or 4 key membrane keypads ? It is easy enough to find expensive ones from parts suppliers but I can't find anything on eBay. Or to look it it another way, if you had a project that only needed 4 keys for data entry, is there a more elegant way than 4 push button momentary switches drilled through the front panel ? The most elegant is undoubtedly a touch screen GDU but I'm not going that way - yet !

Andrew