If you do not allow these cookies then some or all of these services may not function properly. They may be set by us or by third party providers whose services we have added to our pages. Functional Cookies: These cookies enable the website to provide enhanced functionality and personalization. These cookies do not store any personally identifiable information. You can set your browser to block or alert you about these cookies, but some parts of the site will not then work. They are usually only set in response to actions made by you which amount to a request for services, such as setting your privacy preferences, logging in or filling in forms. Strictly Necessary Cookies: (Always Active) These cookies are necessary for the website to function and cannot be switched off in our systems. After we finish updating our website, you will be able to set your cookie preferences. Related ContentĪnalog Devices is in the process of updating our website. With the MAXQ2000’s SPI and I 2C interfaces, this temperature-monitoring system can work as a low-cost temperature monitor by displaying real-time temperatures through the MAX7219. The MAX31875 is an accurate local temperature sensor. The accuracy of the monitor over temperature (Figure 3) is below 1☌.įigure 3. Put this temperature monitor inside the Fluke® oil bath calibrator and collect temperature readings from -20☌ to +150☌. Max7219_writeregister(MAX7219REG_Degree,digit_pattern,LENGTH_16) // Display Celsius sign A digit pattern is assigned to the MAX7219’s register data, so, each LED can display the corresponsive number. However, to display the Celsius sign, we use no-decode mode. The MAX7219 drives an 8-digit, 7-segment LED display. SPICN_bit.SPIC = 0 /* Clear the tansfer complete flag. While(!SPICN_bit.SPIC) /* Wait for the transfer to complete. SPICN_bit.SPIC = 0 /* In case it is already set, clear the */ While(SPICN_bit.STBY) /* Wait until the character can be sent. Unsigned int spi_transmit(const unsigned int ch)

spi_transmit() performs an SPI transfer as shown below. The temperature reading received from the MAX31875 is sent to the MAX7219 using the SPI and the MAX7219’s register. The device is available in a 4-bump, wafer-level package, uses >15 //get sign The MAX31875 is a ☒☌-accurate local temperature sensor with an I 2C/SMBus interface. This application note introduces a temperature monitoring system with LED display based on the MAXQ2000 microcontroller, the MAX31875 high-resolution local temperature sensor, and the MAX7219 eight-digit LED display drivers.

Onboard temp monitor pc