measurement
The Key parts and Ports columns are generated by
docs/gen_hardware_docs.py; edit only the Function text.
| Sheet | Function | Key parts | Ports |
|---|---|---|---|
reciprocal_frequency_measurement.kicad_sch |
Counts Vin edges between CLR and MEAS_STOP |
SN74LV4040ADR | CLR, GND, MEAS_STOP, Vcc, Vin |
A 12-bit binary counter clocks on Vin; CLR resets it and MEAS_STOP
carries a counter output to the MCU, which computes the frequency from the
count and the gate length. COUNTER_CLR and MEAS_STOP are driven from the
root headers.