Quote:
Originally posted by Lloyd Burns
The Banner sensors' outputs merely take the input pin to ground. They might like more voltage than the EduBot battery has, in which case you could lash up some 9V batteries, and feed the sensor(s) approx 18 V.
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It's considerably more complicated than that, but basically that's what I said. If they did that, they would most surely damage the digital inputs.
The problem with this solution is that you are crossing batteries (feeding power from the 9V batteries into the NiCD battery). One pole will become depleted much faster than the other pole. Although this shouldn't lead to any problems, it isn't a very good practice.