The TC77 device operates as a temperature sensor via an SPI interface. Its circuit connections are very simple, and the device has a temperature range of -55°C to +125°C.
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The MCP9800 digital temperature sensor converts temperatures between -55°C and +125°C. It provides an accuracy of ą1°C (maximum) from -10°C to +85°C. Interfacing to it is very straightforward via an I2C bus.
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The MCP9700 is an analogue device that doesn't need any additional components to work. Therefore, after connecting ground and power supply we are ready to measure temperature.
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