POSTER:computer news || ENTHUSIAST MADE MOBILE PHONE WITH ROTARY DIAL
DATE:2014-06-19
If you try to make a list of the most bizarre and useless inventions, then it is required to include the creation of engineering genius [Jaromir] - mobile phone with rotary dial. The device created by an enthusiast chip-based NXP LPC810, which represents the core ARM Cortex M0 + Eight.
[Jaromir] has only six I / O pins available to management module GSM, a few buttons and display, although they should be about 12-16 pieces. To work around the limitation, the enthusiast used 8-bit shift register 74HC164 with serial input and parallel output. Job number shown in the videos:
Of course, the experience [Jaromir] is nothing more than imagination and explore the possibilities of individual chips. Enthusiast even going to improve telephone, adding power saving mechanisms for longer battery life and caller ID function realized.
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