1.4 MCU connections

                                    PIC16F1828
                                   ------------
                               VDD | 1     20 | VSS
                    Relay Heat RA5 | 2     19 | RA0/ICSPDAT (Programming header), Piezo buzzer
                    Relay Cool RA4 | 3     18 | RA1/AN1/ICSPCLK (Programming header), Thermistor
(Programming header) nMCLR/VPP/RA3 | 4     17 | RA2/AN2 Thermistor
                         LED 5 RC5 | 5     16 | RC0 LED 0
                  LED 4, BTN 4 RC4 | 6     15 | RC1 LED 1
                  LED 3, BTN 3 RC3 | 7     14 | RC2 LED 2
                  LED 6, BTN 2 RC6 | 8     13 | RB4 LED Common Anode 10's digit
                  LED 7, BTN 1 RC7 | 9     12 | RB5 LED Common Anode 1's digit
       LED Common Anode extras RB7 | 10    11 | RB6 LED Common Anode 0.1's digit
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