Thermoelectric Cooler (TEC1-12705)

Features:

• Utilizes the Peltier effect for cooling/heating
• Must be used with a heatsink to avoid overheating
• Each module is fully tested and inspected
• Equipped with 6-inch insulated leads
• Max operating temperature: 138°C
• Life expectancy: up to 200,000 hours
• Temperature differential: up to 68°C
• Failure rate (based on long-term testing): 0.2%

Specifications:

• Model: TEC1-12705
• Dimensions: 40mm x 40mm
• Operating Voltage: 0V – 15.2V
• Operating Current: 0A – 6A (Max 5A Recommended)
• Power Consumption: Max 60W
• Operating Temperature Range: -30°C to 70°C

Applications:

• Cooling/heating electronic components (e.g., sensors, microcontrollers)
• Thermal regulation in scientific and industrial experiments
• Portable food and beverage cooling/heating
• Temperature control in renewable energy systems
• Wearable cooling/heating gadgets
• Horticulture setups (e.g., plant incubators)
• Computer or console cooling
• Medical applications like DNA analysis
• Thermal management in drones or RC cars

Pin Connections:

Sample Project:

This project demonstrates how to control the TEC1-12705 with an Arduino, temperature sensor (LM35), and a 2-channel relay.

Circuit:

• Arduino Uno
• LM35 temperature sensor submerged in water
• 2-channel relay (using 1 relay)
• TEC1-12705 connected via relay

Library: No external library needed.

Arduino Code:

// Programa: Cooler TEC1-12705
int pin = A0;
int pinorele = 4;
int TEMP_MAX = 20;
int TEMP_MIN = 10;
String state;
int tempc = 0;
int samples[8];
int i;

void setup() {
  Serial.begin(9600);
  pinMode(pinorele, OUTPUT);
}

void loop() {
  for(i = 0; i <= 7; i++) {
    digitalWrite(pinorele, LOW);
    state = "Triggered";
  }

  if(tempc <= TEMP_MIN) {
    digitalWrite(pinorele, HIGH);
    state = "Desligada";
  }

  Serial.print("Temperatura : ");
  Serial.print(tempc, DEC);
  Serial.print(" Cels. - Pastilha : ");
  Serial.println(state);

  tempc = 0;
  delay(1000);
}

Important Notes:

• Never operate the TEC1-12705 without a heat sink—doing so can cause permanent damage.
• Monitor current and voltage levels to ensure safe operation within limits.

Reference:

• Video: Thermoelectric Cooler Project