 | | Rotation sensor —Jan Troelsen
| | | | Hi ! I am trying to make a gray code rotation sensor using hardware from an old mouse. The circuit needed to drive the photo transistor should be the same as for your rotation sensor URL: (URL) do however don't quite understand the photo resistor (...) (25 years ago, 3-Feb-00, to lugnet.robotics)
| | | | | | | | | | Re: Rotation sensor —Roger Hamlett
| | | | | (...) The circuit shown, is rather basic, but perfectly acceptable. The phototransistor draws a varying amount of current according to the incident light level. During the 'sense' phase of the Lego cycle, the voltage being returned is read, with the (...) (25 years ago, 4-Feb-00, to lugnet.robotics)
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