What I said in my previous mail about 'the signal should represent a linear, variable (analog or discrete steps) voltage divider' should be complemented with the following restriction: "it must also represent a continuous (coherent) DC voltage (signal)". Ref.: attached images [analog-signal.jpg/discrete-steps.jpg] If I understand you correctly, Alan, then your device (throw switch) will produce a non-coherent series of voltage levels (signals) that will cause a lot of "black holes", i.e. no LED lit on the rudder angle indicator whenever the rudder angle doesn't coincide with the fixed positions of the contact points on the throw switch itself. Ref.: attached images [isolated-values.jpg/SP11T-switch.jpg] Therefore, to use such a switch, we will have to include some "memory" to the existing circuit to ensure that the last LED remains lit until a new position on the switch is reached (i.e new signal update). What do you think, Alan? The current version of my Rudder Angle Indicator can be viewed/downloaded here: ftp://ftp.artematrix.org/instrumentation/rudder_angle_indicator/LM3914_RAI_V1.jpg The LM3914 data sheet can be viewed/downloaded here: ftp://ftp.artematrix.org/instrumentation/rudder_angle_indicator/LM3914.pdf Best regards, Jens Laland
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