More about Build the Opticalock - Article Series (2)

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Build the Opticalock (2):

by Michael Swartzendruber

1-10-1991 | BUILD THE OPTICALOCK

Members Only

Build the Opticalock (1):

by Michael Swartzendruber

1-09-1991 | Combination locks are useful because they can not be picked like a 'key' lock can. If a combination lock could sound an alarm before it wa...