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С LIU marks] (b) A humidity sensor DHT11 is connected to the ATmega32 at ADC2 input port as shown in Figure Q3(b). The sensor has a range from 20% up to 90% corresponding to an output voltage from 0 to 5 V. The humidity value 70% corresponds to 3V input. Once this voltage reaches 3V, the DC fan will start. Describe the System on Chip SoC needed to implement this system by writing the C code. [25 marks] +12v 16 18 U3 RESET VSS 13 12 IN1 IN2 EN1 VS OUT OUTZ (0) XTAL1 XTAL2 U2 22 PCO/SCL PC1/SDA 23 PC2/TCK PC3 TMS PCA/TDO PC5/TDI PC6/TOSC1 PCT/TOSC2 23 3.HU KRPM 2 10 DATA SCK 1919 EN2 IN3 IN4 0:18 11 14 OUTS GND GND OUT4 DHT11 L293D 40 PAQ/ADCO PA1IADC1 PAZIADC2 37 PA3/ADC3 PA4IADCA PASADC5 34 PAG/ADC6 33 PATIADC7 1 PBO/TO/XCK 2 PB1/1 PB2/AINONTZ 4 5 PB3/AIN1/OCO PB4/SS PB5/MOSI PB6/MISO PB7/SCK PDO/RXD PD1/TXD PD2ΛΝΤΟ PDZINT1 PD40C1B PD5/OCTA PDG/CP1 PD710C2 21 AREF AVCC 32 30 ATMEGA32 Figure Q3(b)