20 switch posistions to fewest input lines
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Posts: 46,084
Hi all,
I need to connect something like a rotary switch (preferr a pot) to
a Stamp and want to use a minimal number of pins.
I have 20 seperare conditions. all fed from one device.
Actually, I would like to use a pot to a chip and have that chip then
signal the stamp.
speed is the problem, the input must be on the pins and not serial as
the serial takes too long.
The pot is preferred only as a pot is cheap and a 20 posistion switch
is expensive.
any suggestions ?
Dave
I need to connect something like a rotary switch (preferr a pot) to
a Stamp and want to use a minimal number of pins.
I have 20 seperare conditions. all fed from one device.
Actually, I would like to use a pot to a chip and have that chip then
signal the stamp.
speed is the problem, the input must be on the pins and not serial as
the serial takes too long.
The pot is preferred only as a pot is cheap and a 20 posistion switch
is expensive.
any suggestions ?
Dave
Comments
Do you need absolutly 20 positions? you can get 16 positions, monitor 4 pins
from a hexidecimal rotary switch...
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