Numitron clock circuit with Atmega32 Numitron clock circuit with Atmega32 The project deals with the construction of a universal display panel with 6 8 segment display tubes (numitrons) IV-6 of Russian production. The panel is also supplemented with a control unit with Atmega32 processor, where software for realization of clock is implemented. The operation of the device is the same as with the classic digital clock (watch) using the MENU and SET buttons. In addition to the clock, additional sample “applications” are programmed as running text, ripples, or binary pointers to demonstrate display panel capabilities. In the future, there is an expansion of the program and control unit with microcontroller so that it is possible to numerically control FM tuner with PLL tuning or other HW peripherals. The panel can then display the current tuner frequency, the set radio alarm time as a classic clock radio and the like. The display panel is implemented on a PCB that contains 6 pieces of numitrons themselves, transistors for multiplex control and 2 switched sources for powering the displays. The switching step-up power supply provides power to the display anodes with 25V / 50V output voltage selection depending on whether static or multiplex control is used and is supplemented by the possibility of external MAX1771 PWM control (resulting numitron light intensity). Another MAX758 step-down power supply provides a 1.22V voltage to power the numitron filaments. Both switching power supplies are implemented by Maxim integrated circuits, which were ordered as test samples. The resulting panel contains a power connector (input voltage is between 5V – 15V), 8-pin connector for single segment control and 8-pin connector for individual numitron switching, external PWM control and step-down control for glowing.

Variable number of display Hi Tech C Example

Very nice Hi tech C examples we are here . In this application a variable defined as longer displayed on the screen that will examine how the number . tmp sequence numbers assigned to the same are shown on the display . The first button is pressed, the value of one variable increases, the second button is pressed, the value of the num variable is decreased by 1 , the last button is pressed, the num variable is assigned to 0 .

Num variable values ​​on the display are divided into steps before the show . In a number of steps to get the mode field with 10% , ie, the number 10 and the remainder calculated tmp [0] in the first step of assigning a display is provided on the display .