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According to the society of robots from the topic (Line follower, obstacle avoider, photovore and photophobe in $40), i have one question after i read through of it. There's stated that it can be Line follower, obstacle avoider, photovore and photophobe but from the step part construction does not show the building obstacles avoidance part. Can i use Sharp IR sensor to build into the circuit so that it can works as obstacle avoider? If can then how to connect it ? This does not use microcontroller but only use L293D chip to control it. Help!! Thanks
I want to ask one more question about that "The $40 Line Follower without using microcontroller project", if i change from CDS photoresistors to phototransistor from the circuit, does it works? What difference between photodiode, cds photoresistors, LDR and phototransistor? if i have change to phototransistor, do it suit?
Quote from: theanxin on January 31, 2009, 06:56:26 AMAccording to the society of robots from the topic (Line follower, obstacle avoider, photovore and photophobe in $40), i have one question after i read through of it. There's stated that it can be Line follower, obstacle avoider, photovore and photophobe but from the step part construction does not show the building obstacles avoidance part. Can i use Sharp IR sensor to build into the circuit so that it can works as obstacle avoider? If can then how to connect it ? This does not use microcontroller but only use L293D chip to control it. Help!! ThanksTo use the $40 robot as an obstacle avoider, you will have to mount the sensor board such that the sensors face forward. Use the same arrangement to use the robot as a photovore or a photophobe. Quote from: theanxin on February 02, 2009, 08:56:27 AMI want to ask one more question about that "The $40 Line Follower without using microcontroller project", if i change from CDS photoresistors to phototransistor from the circuit, does it works? What difference between photodiode, cds photoresistors, LDR and phototransistor? if i have change to phototransistor, do it suit? You can use an photoresistor, with little changes to the circuit. Phototransistors are most suitable for a obstacle avoider while CdS are most suitable for a photovore or a photophobe.
1) To use the robot as an obstacle avoider, you will have to mount the sensor board facing forward, such that the sensor will be able to detect any obstacle in front.2) You can use Photodiode and an IR LED but you will have to make changes to the circuit. 3) You can buy any DC motor with a speed around 100 rpm. Check the RMF calculator http://www.societyofrobots.com/RMF_calculator.shtml to see if a motor will suite your robot.