[Electronics-talk] Accessible lock

[Carolyn Brock]

Listers,
    This is a really low-tech question, but does anyone know of a 
small padlock (suitable for, say, a health club locker) that operates 
without a key or a visual combination system?  Ideally I'd love 
something that responds to a voice command, even a fingerprint or 
something similar.  But I'd settle for a small keypad.  I've struck 
out at hardware stores.
Carolyn