Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: Mike11 on June 23, 2011, 12:03:27 PM

Title: what resisotor?
Post by: Mike11 on June 23, 2011, 12:03:27 PM

Hi,

does anyone know which resistor go with the photoresistors in the 50 buck project (340 ohm vs. 1.6 kohm)? I couldnt find anywhere Also, does it affect the robot in any way - I mean, can the software cope with both possibilities?

Thanks a lot
Mike

Title: Re: what resisotor?
Post by: Soeren on June 23, 2011, 12:35:17 PM

Hi,

Quote from: Mike11 on June 23, 2011, 12:03:27 PM

does anyone know which resistor go with the photoresistors in the 50 buck project (340 ohm vs. 1.6 kohm)? I couldnt find anywhere Also, does it affect the robot in any way - I mean, can the software cope with both possibilities?

The resistor will depend on the resistance of the LDR. Measure the LDR value at max. light and max. darkness it will see and use a resistor value that is at the percentile middle.
That way it will have the largest range possible (as long as the value isn't adjusted dynamically, which would be a project in it's own right).