Vermes
Advanced Member level 4
It is a new version of the temperature recorder with a dedicated double-sided board made by thermal transfer method instead of an universal board. The system was equipped with a alphanumerical display, keyboard and buzzer.
The keyboard has 6 buttons connected in a matrix - “arrows”, “OK” (left-down) and “Back” (right-down). After holding the “OK” button while starting the recorder (reset), the configuration mode turns on. You can set the current time in that mode. The display is 16-character module on the controller compatible with HD44780. The current time and temperature alternately with the date is displayed on it. There are three signalling diodes (power supply, status – flashes every 5 seconds, the record \ read from the SD (SPI)\RTC(I2C)\Thermometer(1Wire)) and the buzzer that sounds when you press the buttons for configuration and control signals when starting. Additionally, there is UART(TTL) pin on the board, useful for debugging.
Elements used:
- Atmega32
- DS1307
- DS18B20
- LCD
- battery 3V + socket
- SD socket
- LF33CV
Link to original thread (useful attachment) – Rejestrator temperatury z SD - V2