| FW error corrected PIC clock source | |
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PIC Clock Divider I
schematic r02 source code r01 source code r00 source code Simple clock generator that puts out 1cps, 1cpm and 1cph square waves from a 32.768kHz clock crystal. The next level of complexity would be to add a frequency trim to tune out the crystal error which on my first try was about +6 seconds per 4 days. This could be from a better quality crystal, a TCXO as the clock source (No change to the code) or perhaps even a pulse skip programmed into the firmware; drop a second pulse after a seconds' worth of error which would look like a leap year adjustment. |