MIKROE Fan Click carries an EMC2301 controller for powering and regulating the operation of 5V four-wire fans, which are commonly utilized as coolers in computers and other electronics. The controller supports PWM speeds from 9.5Hz to 29 KHz, in four programmable frequency bands. The control algorithms and the clock inside the circuit allow you to regulate the RPM of a given fan with 1% accuracy in the 500-16k RPM range. The TACH pin gives feedback on the fan’s operation. Fan Click also incorporates detection of aging fans, and alert on fan stall (the fan driver even attempts to fix a stalled fan while sending the interrupt) These alerts are sent through the mikroBUS™ INT pin. Otherwise, Fan Click communicates with the target MCU through an I2C interface.
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