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DESCRIPTION
The W1209 DC 12V Digital Temperature Controller Module is a compact electronic thermostat used to automatically control heating or cooling devices based on temperature. It includes a waterproof 10K NTC temperature sensor, a 3-digit LED display, and a 10A relay for switching electrical loads. It is commonly used in incubators, aquariums, refrigerators, greenhouses, and DIY temperature control systems.
Feature | Description |
Board | Arduino Nano V3.0 (CH340 Version) |
Microcontroller | ATmega328P |
USB Interface | CH340G USB-to-TTL Converter |
Operating Voltage | 5 V |
Input Voltage (VIN) | 6–12 V (recommended 7–12 V) |
Clock Speed | 16 MHz |
Flash Memory | 32 KB (2 KB used by bootloader) |
SRAM | 2 KB |
EEPROM | 1 KB |
Digital I/O Pins | 14 (D0–D13) |
PWM Pins | 6 (D3, D5, D6, D9, D10, D11) |
Analog Inputs | 8 (A0–A7) |
Communication | UART, I²C, SPI |
USB Connector | Mini USB |
Dimensions | Approximately 45 × 18 mm |
Terminal | Function |
12V+ | DC 12V Power Input |
12V? | Ground |
NTC | Temperature Sensor Input |
COM | Relay Common |
NO | Normally Open Contact |
NC | Normally Closed Contact |