TimeSpaceLightForce Posted December 12, 2014 Report Share Posted December 12, 2014 The LCD device shall tell the right time (HH:MM:SS) in 12-hour format..(see photo) Figure out how can this watch be designed to work? Quote Link to comment Share on other sites More sharing options...
0 witzar Posted December 13, 2014 Report Share Posted December 13, 2014 For example you can encode MM using first digit except bottom segment (6^2=64>=60), you just need to agree on some order or the above 6 display elements, so that they represent MM in binary. (Each element of display is a binary digit "on"=1, "off"=0.) Same way you can use second digit to encode seconds. The remaining 4 elements of display (two bottom segments plus two dots) can be used to encode HH (4^2=16>=12). I don't see any particular ordering that feels natural. Quote Link to comment Share on other sites More sharing options...
0 DejMar Posted December 12, 2014 Report Share Posted December 12, 2014 You are missing some parameters in your problem. What do you mean by "how can this watch be designed to work?" Is it not already designed to work? Are you asking how an LCD device works? Quote Link to comment Share on other sites More sharing options...
0 witzar Posted December 13, 2014 Report Share Posted December 13, 2014 (edited) To display HH:MM:SS in 12-hour format you need ⌈log2(12*60*60)⌉ = 16 bits of information, but your display has only 15 elements. Therefore the task is impossible if each element can only be "on" or "off". You need to cheat a little bit, for example add blinking or something like that. Edit: I miscounted the elements:) The display has 16 not 15 of them, so you can use it without cheating. Edited December 13, 2014 by witzar 1 Quote Link to comment Share on other sites More sharing options...
0 TimeSpaceLightForce Posted December 13, 2014 Author Report Share Posted December 13, 2014 You are missing some parameters in your problem. What do you mean by "how can this watch be designed to work?" Is it not already designed to work? Are you asking how an LCD device works? Reword: "is expected to" for "shall" tell the right time.. The device is a simple "level indicator" that is to be converted to a watch. You can replace the chip but retain the LCD screen. How would you design or program such chip? Quote Link to comment Share on other sites More sharing options...
0 TimeSpaceLightForce Posted December 13, 2014 Author Report Share Posted December 13, 2014 @witzar How would you interpret the above photo to HH:MM:SS? Quote Link to comment Share on other sites More sharing options...
0 TimeSpaceLightForce Posted December 14, 2014 Author Report Share Posted December 14, 2014 (edited) Modifying witzar's (64,16,64) A _:_ A system to 0-:-0 for symmetry and progressive clockwork pattern.. Edited December 14, 2014 by TimeSpaceLightForce Quote Link to comment Share on other sites More sharing options...
Question
TimeSpaceLightForce
Link to comment
Share on other sites
6 answers to this question
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.