One important consideration to take when developing read rope into a product is the precision of the output voltage as determined by precision of input.
- Precision of Output Voltage. How well can output voltage be read.
- The resistors used will determine the ratio of resistance between output terminal and ground to total resistance in the circuit which determines the output voltage.
- The tolerance of these resistors needs to be considered for when output voltage will be fed into an analog-to-digital converter which expects a precise value for a certain bend. 1% tolerance in resistors is ideal.
- The difference between resistors will determine the difference between output voltages at certain bends. Ideally the resistors should be on the same order to avoid 1 bend at lower end not adding noticeable amount to output voltage.
- The resistors used will determine the ratio of resistance between output terminal and ground to total resistance in the circuit which determines the output voltage.
- Precision of Input. Where the bends can be made.
- Ideally for a very precise small read rope, the resistors will need to be placed very close to each other for bends to be interpreted that are very close to each other.
- Size of SPST switch and resistors will determine placement of resistors and size of bends.
- Ideally, for a large rope where only a few bends need to be read, resistors can be placed far apart from each other and connected through long wire.
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