water flow meter..

[BobK]

Hi Ecca,

Can you provide us with some information on the flow meter, such as the manufacturer and part number, perhaps a web site to look at this sensor closer?

Thanks,


BobK

[Darrel Taylor]

For saving to the EEPROM, choose a PIC with a LVD (Low Voltage Detect) interrupt.

When the power is turned off, the interrupt gets triggered, quickly save to EEPROM while the chip is still running on the capacitor charge.

The rest of the time, the value is available in RAM. No need to save it on every loop.
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[mister_e]

Or a comparator interrupt OR modify the power supply. You place a diode between the bridge and the capacitor, then send the bridge side on a interruptable pin.

Just another idea

How many different ways exist to skin a cat?

[Charles Linquis]

The 18F8722 datasheet claims the EEPROM is typically good for a million write cycles. I would probably trust it for 500K cycles.

[ecca]

Right then, having returned from holidays..... I continue.
I only require a 3 digit LCD with about 12mm digits.
What's around at the moment ?
Thanks for help all,
Ecca