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Unread 30-01-2007, 16:05
TubaMorg TubaMorg is offline
Programmermechanicalelect ricalcoach
AKA: Dan
FRC #1480 (Robatos Locos)
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Re: String Pot: Good, Bad or Mixed Bag?

Great, thanks for the clarification Alan!

What about this from the Guidelines manual?

G.6.4 Sensors
In general, the robot controller anticipates receiving inputs from sensors either in the form of contact closures (digital) such as those from a gear tooth sensor, or as 0-5V voltage levels (analog) at its input ports. In the case of analog signals, the robot controller supplies 5Vdc at 1 Amp for the analog inputs. As there are 7 input possibilities, each port should be limited to approximately 50ma. The input types, a combination of potentiometers, accelerometers, and gyro (yaw) rate sensors, should present high impedance to the analog input. All potentiometers must be 100KΩ.

Ok the last edit to this post. Just to confirm what Alan said (was there ever any doubt?!?), here is what the RC manual says about potentiometer inputs to the analog ports of the RC:

The analog inputs on the Robot Controller can be used to measure various conditions on the robot and
trigger automatic responses by the control program. There are 16 analog inputs available on the
ANALOG INPUTS connectors on the Full-Size Robot Controller.
Any sensor which outputs a variable 0-5V signal may be read with 10-bit resolution on these inputs.
Popular devices include potentiometers and gyro (yaw rate) sensors. Potentiometers should be wired per
the diagram below when connecting to the Analog Inputs. Use 250Ω – 100KΩ potentiometers. For
wiring yaw rate sensors, refer to the sensor manufacturer’s data sheet.

Last edited by TubaMorg : 30-01-2007 at 16:34. Reason: Ok the final answer.....