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Electronics/Household letters box with mechanical combination Lock.

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Question
Dear ZZ

Is it possible to design and Construct household letters box with mechanical combination Lock?.

Thanks
Prashant

Answer
From an engineering point of view it is no problem to add combination locks.

The problem is they are so inconvenient and require too much time to enter and remembering the combination is not pleasing to the resident.

Combination locks are such old technology and were popular back before the electronics era but are not on user minds any more.  

I don't lke the idea at all.  

Electronics

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ZZ

Expertise

Electronics questions about AC, DC and digital theory.

Experience

Graduate electrical engineer with over 40 years in electronic design, manufacturing, project organization and patent review. Experience in fields of industrial and consumer electronics (audio, video, acoustics, etc.)

Organizations
IEEE (Institute of Electrical and Electronics Engineers); Senior Life member AES (Audio Engineering Society), Fellow Life member

Education/Credentials
BSEE University of North Dakota

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