Table 1.

List of materials and specifications used to construct the prototype

S. No	Items	Specification
1	Peltier	12 V DC
2	Fan	12 V DC
3	Arduino	Arduino Mega
4	DC motor	12 V
5	Solenoid valve	12 V
6	Mattress	Plastic
7	Power supply	12 V
8	Water temperature sensor	DS18B20
9	Skin temperature sensors	LM35
10	LCD	16 × 2
11	Reservoir	Plastic
12	Relay	12v
13	Buzzer	Buzzer
14	LED	16 × 2
15	Keypad	4 × 4
16	Heat sink	Al heat sink
17	Tubes	PVC