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HYDRA-X BLDC H

EAD

ARDWARE

For applications wanting to utilize an external potentiometer, the 3 pin header connector gives access to

analog input PC4. The potentiometer resource is pulled up via a 5.1K resistor. In the event the external

potentiometer requires a different pull up resistance, resistor R19 can be modified accordingly with a 0603

package of suitable resistive value.

Figure 3 External Potentiometer Circuitry

In order to protect power FETs from being adversely affected by extremely high temperatures, a thermistor

input is provided. Thermistor temperature can be sampled through analog input AIO2.

By default, the thermistor's pull up resistor is a Non Populate component. User can select appropriate pull up

resistor (0603 package) and populate at the R18 footprint location.

Figure 4 External Thermistor Circuitry

Rev 1.0 June 2014