Solid State Thermostat

The ELM331 is a complete temperature measurement and control system in an 8 pin package. This integrated circuit is designed to compare two resistances and drive an output pin depending on the relative value of each. Typically, one of the resistors will be an NTC thermistor, and the other one will be a temperature independent resistor (whether fixed or variable). When the magnitude of the resistance connected to pin 2 exceeds the value of the resistance connected to pin 3, the output pin will be driven to a high state. Hysteresis maintains the output in that state until the relative values differ by approximately 8% (or typically 2C for a 10KW thermistor). By ELM Electronics
ELM331 's PackagesELM331 's pdf datasheet

ELM331 Pinout, Pinouts
ELM331 pinout,Pin out
This is one package pinout of ELM331,If you need more pinouts please download ELM331's pdf datasheet.

ELM331 Application circuits
ELM331 circuits
This is one application circuit of ELM331,If you need more circuits,please download ELM331's pdf datasheet.

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