Society of Robots - Robot Forum

Electronics => Electronics => Topic started by: cooldog on February 02, 2008, 09:06:36 PM

Title: making photovore sensor question
Post by: cooldog on February 02, 2008, 09:06:36 PM

what reistor is use to make the photocell sensor

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

Title: Re: making photovore sensor question
Post by: ed1380 on February 02, 2008, 09:08:04 PM

2 questions for you.

1- which resistors did admin order?
2- which one did he use for the led?

Title: Re: making photovore sensor question
Post by: cooldog on February 02, 2008, 09:12:14 PM

340ohm
1.62K

don't know which one he used for the LED

Title: Re: making photovore sensor question
Post by: garriwilson on February 02, 2008, 09:22:05 PM

I think (70% sure) that I used the blue one. I can't check because it's covered in heatshrink. Wait for someone good to answer.

Title: Re: making photovore sensor question
Post by: airman00 on February 02, 2008, 09:23:46 PM

340 ohm for the led sounds right

i use a 10K ohm resistor on my photocells though

Title: Re: making photovore sensor question
Post by: ed1380 on February 02, 2008, 09:55:55 PM

Quote from: cooldog on February 02, 2008, 09:12:14 PM

340ohm
1.62K

don't know which one he used for the LED

look at the picture, read teh tutorial. worst case senario use this to decode it http://www.dannyg.com/examples/res2/resistor.htm