one wire voltage sensor

hey have project includes battery bank 20 12vdc batteries.
them able monitor separately.
there seek form of 1 wire voltage sensor.

or there project can use attiny45 1 wire unit.

kim jessen

if wish monitor each battery separately need appreciate both battery terminals operating @ voltage somewhere between 0v , 240+ (more 300v).  therefore require form of multiplexing system such selected battery negative terminal can connected attiny negative reference , battery positive terminal can connected attiny input terminal (via suitable potential divider resistor chain)

so, measurement system simple  -  means of connecting single battery measurement extremely complex.

one method use double pole relays, @ least 1 relay per battery, require separate micro unit sequence each relay in turn.  have ensure 1 relay operates @ time (to prevent shortening batteries) may require further relays.

you might better having individual attinys attached individual batteries , monitor outputs via individual opto-isolated data lines.

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