Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: nathan25 on September 11, 2007, 03:52:24 PM

Title: Whats the VAlue of the Light Sensor Resisitor?
Post by: nathan25 on September 11, 2007, 03:52:24 PM

http://www.societyofrobots.com/schematics_photoresistor.shtml

What is the Value of that Resistor...from the Light Sensor Tutorial?

Thanxs
Nate

Title: Re: Whats the VAlue of the Light Sensor Resisitor?
Post by: Rebelgium on September 11, 2007, 05:04:39 PM

uhhh... if you knew what an LDR (Light Dependant Resistor) was you wouldn't ask this   :-\ ;)
 
The point of these resistors is that there is no static value, but a variating resistor value...

Title: Re: Whats the VAlue of the Light Sensor Resisitor?
Post by: h3ro on September 11, 2007, 05:14:13 PM

You mean the one that is attached to the sensor?

I think its a 1.62Kohm resistor, at least thats whats on the parts list for the 50? robot
DigiKey.com
1.62KXBK-ND

Title: Re: Whats the VAlue of the Light Sensor Resisitor?
Post by: nathan25 on September 11, 2007, 05:18:42 PM

Thnxs... i wanted to make sure b/c i dont wanna blow the transistor.

Title: Re: Whats the VAlue of the Light Sensor Resisitor?
Post by: Rebelgium on September 11, 2007, 05:33:46 PM

ohh right :D

Title: Re: Whats the VAlue of the Light Sensor Resisitor?
Post by: Admin on September 14, 2007, 10:21:22 AM

any resistor will work . . . but there is an optimal value that gives your robot the best sensor readings. the resistor value I gave is close to that value.