WrenDAQ2 main circuit board. There is a PIC18F2610 microcontroller (U5) in the center of the board. The passive parts on the left are low-pass filters for the anemometer and RPM inputs. The passive parts at the op-amp (U3) are low pass filters for the ...

WrenDAQ2 main circuit board. There is a PIC18F2610 microcontroller (U5) in the center of the board. The passive parts on the left are low-pass filters for the anemometer and RPM inputs. The passive parts at the op-amp (U3) are low pass filters for the analog inputs. There is an onboard temperature sensor (U4). On the right is a point-of-load regulator that takes the 8 volts from the switching power supply on the other board and regulates to 5 volts. U6 is a precision 5.00 voltage reference for the ADC.