First Generation e-lock schematics?

[Peter Martin]

Can someone name some of the 1st generation (late 70s and early 80s) electronic locks--ones that used a keypad or pushbuttons? Once I figure out what they are, I'll locate the schematics for them.

I enjoy building electronic devices (ham radio guy here--KE0BRS) and want to build some of the more simple electronic locks--using the schematics. I'd like to start with the ones that use the more basic logic chips that throw a relay and solenoid, etc. I can program my Arduino to do this now, but that's not really the point. I'd prefer to study what commercial companies used to sell first.

Pete
Sioux Falls, SD

[just1pick+open]

Maybe some info. in here. https://www.locksmithledger.com/locks/a ... tton-locks

[stratmando]

Google "Electronic Keypad Schematics", a lot there, some
Arduino stuff as well. Radio Shack had a good little Keypad, Remember it to be pretty basic, only a couple Chips, may have to get one to take apart draw the Chips first, then Draw in the Components and connections, first drawing will have a lot of traces crossing, then you can start unfolding the the wiring/traces to minimize the crossing. Think I Used Some Linear Back then, as well as BGE(Blue Grass Electronics), I think now they are IEI, Modern Stuff is much more Difficult. Usually can't get a schematic, SMD components can be very small, then identify/decode the components is another job, I take it you will be using Through Hole, Aliexpress does make bare boards that accept SMD for prototyping. Could use DTMF Tones, and Tone Decoder, you could use the 4 Unused(for people)DTMF Tones(A,B,C and D). Can even do with a single switch, and enter a series of presses similar to Morse Code. Good Luck. Able to tell more about what you want to accomplish? Thanks

[jwrm22]

Basic electronic locks are not that hard to make these days. However to make it secure is a challenge.
As you know Arduino I'd check how to read a keypad and how to switch a solenoid.

[Safecrackin Sammy]

Take a look at the Continental Instruments Cypher Lock. I think Alarm Lock/Napco has it now.

It was made back into the 1960's and used alot in the military.

Clunky old stuff but survived well in marine environments that had major voltage fluctuations for ship/shore power change sources.

Sargent and Greenleaf had its comparable Codetronics 1999/2000 models as well.