Vermes
Advanced Member level 4
It is a project of an user friendly mini advert panel. Thanks to a driver on Atmega32 of own construction, one of the device's features is great potential of its control: directly by USB, by RS232/485 and by parallel link typical for older Futaby VFD displays.
In general, the controller can be controlled by:
- IR – remote control in standard RC5, Sony, JVC or Samsung
- Bluetooth – BTM-222
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PCF8583 (SMD) clock is supported by a condenser of a big capacity 1F and it withstands few days without powering. The time can be set from a computer or even automatically synchronized by Bluetooth by the software.
The controller does arbitrary temperature sensors – it works the same way in 12-bit mode: DS18B20, DS1820 or DS18S20.
Remote control for IR is used for quick changing texts stored both in FLASH memory (thanks to Atmega328) and in the EEPROM memory (which allows to define your own customer text strings directly from your computer) by default. Strings may have 254 characters and smoothly scroll the top line of the display.
Thanks to that when eg person has to leave the office for an hour, it isn't necessary to write a note-sheet. Now a predefined text can be switched with a remote control:
'Break from 2.00 p.m. to 3 p.m. We apologize for the inconvenience.'
or:
'Be back soon.'
Time actualization could also be added and for example text:
'Be back in an hour.' would turn after some time to: 'Be back in half an hour.'
Only time of departure and return should be defined.
Now, what is Bluetooth used for. An application in Java can be made to change or edit texts directly from a mobile phone. A dedicated application for this can be made on PC.
The whole works by AT comments through RS232/Bluetooth.
Many operations can be made at one time, thanks to simple AVR.
Program is written in C in Eclipse environment.
Below there are some pictures of plates made by iron method.
The driver at set hour in the evening the display darkens and change the text to eg 'time to sleep' and turns on in the morning. Text can periodically change during the day for example with an advertisement of products, information about promotions etc.
The display without any external microcontroller can be plugged directly by USB to LCD Smartie.
Some applications for communication through Bluetooth with BTM112/222 modules by mobile phones are being made. Below, there are some photos of initial versions of the program, which would check for BT devices in environment and then select which one to connect.
Link to original thread (many videos) – Mini REKLAMA VFD (zegar, DS1820, Bluetooth, Podczerwień)