The MAX31915 translates and conditions the 24 V digital output of sensors and switches used in industrial, process, and building automation to 5 V CMOS-compatible signals required by microcontrollers.
You can use Microchip's low-cost PIC16F818 microprocessor and a pair of gates to construct a digital PLL that can clean noisy digital signals over a range of 4 to 40 kHz. Featuring programmable lock ...