Hi PIC community,

I seek a simple means to measure  20 Volt DC with a PIC 16C84.  8 bits
resolution suffices.

Serial A/D converter like MAX187 or LTC1298 are very expensive or
unavailable in Switzerland.

Would someone have a schema using a NE555 (or other small IC) in
voltage/frequency converter whose PIC could have measure the period ?


Friendly Regards

Robert Rivoir