Squirrels have fuzzy tails.
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i once used the usual 10K and the transistor didnt work , i tried ur method i found the resistance in a dark are were approx 45K i chosed 50K resistor and it worked !! how did you come up with that soultion ??
here's the datasheet of mine phototransistorhttp://www.ram.com.eg/RTE/my_documents/my_files/PT204_6C.pdf , could you tell me how can i calculated the R2 of it ?i suppose R2 = VC/ICon ~=2.5 K but that value didnt work ..
also i've a question reagarding the arrangment of the LED and the phototransistor it should be like LED O X Phototransistor or its better to be LED O X Phototransistor
but its really should be R2 = VCC/Icon or isnt it ?!
ah i mean , the way you put the LED and the phototransistor , they should be in parrael horizontally or verticaly ?
also what's your opinion about white led in differentiating between white and blue strips ?
so there'r no calculations to at least determine what's the minimum resistor to put ?
Quoteso there'r no calculations to at least determine what's the minimum resistor to put ?if you dont know the input (light your robot will see), you cant calculate the output. therefore you cant select a resistor to optimize this until you test it.
Quote from: Admin on May 15, 2007, 06:49:18 PMQuoteso there'r no calculations to at least determine what's the minimum resistor to put ?if you dont know the input (light your robot will see), you cant calculate the output. therefore you cant select a resistor to optimize this until you test it.how would you go about calculating/ testing this