Advanced Member level 4
It is a home made thermometer based on Atmega32. It uses two sensors DS18B20 and LCD 4x40 characters. This design is a clock and 2-point thermometer with temperature graphs from the last 30 minutes, 3 and 12 hours. There are few possibilities to present data on the display. You can also improve the design by adding saving the MAX/MIN temperature and time when they took place, as well as few inputs/outputs of the sensors and other executing devices (relays), which could be programmed in operating device. And, of course, this device should be put in a housing.
The program was written in Bascom. The device uses a universal PCB with uP, buttons and resistors for the programmer, crystal quartz and capacitors, potentiometer for LCD, filtering electrolyte and 4k7 resistor for 1wire.
Link to original thread (useful attachment) - Termometr na ATmega32 2x DS18B20