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Water filtration product circuit based on MSP430F157 with pressure, turbine and battery voltage sensors, switch inputs, LCD and piezo outputs, and battery or wall jack power.

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Back side of water filtration product circuit based on MSP430F157 with pressure, turbine and battery voltage sensors, switch inputs, LCD and piezo outputs, and battery or wall jack power.

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Timer circuit using MSP430F1101 processor to measure switch selectable time up to 2 years on 2 AA batteries.

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Spice simulation graph showing function of a latching switch debounce circuit.  Gold line is the output signal going from 0 to 5V