PICK A CARD OR ...ABORT!!!

摘要

Around Christmas time, I helped a friend with a reverse geocache project that he was building as a gift. Jeff hasn't had a lot of time with the Propeller yet, and I'm always happy to encourage anyone willing to give it a go. Part of the project involved "backdoor" access to the box in the event the number of attempts were exceeded by the user. We kept things simple - or so we thought - by using a magnetically-tripped reed switch inside the box. We did get it working, but the original switch was a bit of a problem.