From: singer@sirius.com
Date: Mon, 22 Mar 1999 07:41:40 -0800
To: Pinhole Listserv <pinhole@exploratorium.edu>
Subject: Re: Lockout buzzer system
All the systems I have seen have been constructed by teachers
themselves from a simple relay circuit. I could probably get specs if
needed from friends.
--Adam Singer (singer@sirius.com)