IV-9,IV-16 Watch

16.11.2020 - 21.11.2021
Electronic clocks on lamps (numitrons) IV-9, IV-16 are made on one printed circuit board with a two-sided arrangement of radio elements. Work was carried out almost exactly 1 year. Along the way, several versions of watches or their models and varieties were created. Some of them will be presented below as models for Proteus 8.11 SP0, as well as finished HEX firmware.

Three buttons/Power 5V

An electronic clock can be used as a desktop clock with a call to the readings at the touch of a button. They are unlikely to fit as wristwatches - the leakage through the diodes is too great. And, as a result, the rapid discharge of the battery. If only to change to field effect transistors. The battery charge level is calculated from 5v (100%) to 0v (0%). Used for wall socket power supply.

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2 buttons/ Li-Po

Electronic watch can be used as handwatch. The battery charge is calculated as follows: Li-Po battery operates in the range of 2.7v (0%) to 4.2v (100%). When the battery voltage is 2.7V, dashes will be displayed on the indicators with a short flash, which indicates that it is time to put the watch on charge.

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2 buttons/ Li-Po

Used 2 Numitrons. Electronic watch can be used as handwatch. The battery charge is calculated as follows: Li-Po battery operates in the range of 2.7v (0%) to 4.2v (100%). When the battery voltage is 2.7V, dashes will be displayed on the indicators with a short flash, which indicates that it is time to put the watch on charge.

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1 button / Li-Po

Electronic watch can be used as handwatch. The battery charge is calculated as follows: Li-Po battery operates in the range of 2.7v (0%) to 4.2v (100%). When the battery voltage is 2.7V, dashes will be displayed on the indicators with a short flash, which indicates that it is time to put the watch on charge.

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Pressure sensor BMP180/Two buttons/Li-Po power

Electronic watch can be used as handwatch. The pressure is also displayed in mm Hg. and altitude in meters and temperature. The battery charge is calculated as follows: Li-Po battery operates in the range of 2.7v (0%) to 4.2v (100%). When the battery voltage is 2.7V, dashes will be displayed on the indicators with a short flash, which indicates that it is time to put the watch on charge.
Unlike all previous clock circuits that used the ATmega8a, this version uses the ATmega328, which is pin-to-pin compatible with the ATmega8a. The use of 328 mega is associated with the conversion of altitude and pressure. Be careful. The use of the LCD is illustrative, however, it displays the correct altitude, temperature and pressure information.

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The finished version of the watch is presented below. Single button version here. Pictures and videos below.


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