Round Dial, Electronic Combination Lock

[Darrel Taylor]

Shouldn't be too hard to make a Combination lock out of that. But, given a 3 number combination, with a 10-turn pot, I'm thinking your wrist is going to get pretty tired of turning.

Perhaps a Left-Right-Left (similar to Master combination locks) single turn, with a quadrature encoder instead of a pot. Or even a single turn pot, if it's continuous (full 360° resistance).

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[BobK]

Hello,

Nuts & Volts magazine ran an article several years ago about a dial type combination lock. I lloked at their FTP library and all I could find was a program called DIGI-LOCK in the October 2005 issue. I'll look thru some of my older NV issues tomorrow and see if I can find anything. I think a guy who worked for ADT designed it.

BobK

The program is for the Basic Stamp 2 but is suppose to easy to convert to PBP.

[Ron Marcus]

How about a rotary encoder, with a generator attached. You give the dial a few turns to charge a big cap, then do the combo. You can eliminate the battery that way.

Ron

[Acetronics2]

Hi,

The Elektor magazine published some times ago a "serial Digilock" ... just use an old "black" ebonite phone to get the number to pulses conversion !!!

Perfect for the " retro look " !!!

for realism, the simplest rotary encoder wil fit, better if clicks are "sound enhanced" !!! ... just use a D Flip-Flop gating to authorize the " once left, once right" operation !!! ... or keep direction info for safety !!!

Alain

I look for project N° ... got it : 040481, July/August 2005 release ...

[mister_e]

LMAO! i did something using the old vintage wall-mount telephone like that here at home few years ago... it replace the usual Home Alarm Keypad.

EDIT: Thanks for the reference Alain. Sometimes those 'maudit francais' are usefull ROFL!