Vermes
Advanced Member level 4
This thermometer is based on processor 89C2051 and temperature sensor DS18B20. It is connected the processor via 1-wire bus. Program was written in Bascom 8051 (unfortunately, it takes a lot of microcontroller memory). The processor is clocked by 12MHz quartz. Temperature is displayed with the resolution of 0,1 degree Celsius. The entire device is powered from a universal power supply + 7805 on a board, so you can easily make any changes such as more sensors. Processor 89C4051 can replace 89C4021 because of the larger memory. Thermometer can be used in a room. Display is Winstar WDH0084.
Link to original thread (useful attachment) – Termometr na 89C2051 + DS18B20 by Miguel573