Icl7107 display driver IC Thermometer temperature sensor 5 volt supply circuit as a single source bc547b used p1 and p2 with the calibration adjustment trimpot icl7107 display two HD-A544D led display used 2 different pcb and feeding you see... Electronics Projects, ICL7107 Thermometer Circuit (transistor sensor) "analog circuits projects, " Date 2019/08/02