blueshift
Newbie level 4
I am making a black line follower robor usibg Atmel 89c1 chip and programmed using C under KeilC development s/w. I have the following doubts in it:
1. Why do we use pull-up resistor at port 0 of 8051?
2. We are using 3 pairs or IR Tx and Rx diodes. Are these operated in forward bias or reverse biased?
3. How does it detect black line? Has that got anything to do with wavelength? What is the wavelenth of black color?
1. Why do we use pull-up resistor at port 0 of 8051?
2. We are using 3 pairs or IR Tx and Rx diodes. Are these operated in forward bias or reverse biased?
3. How does it detect black line? Has that got anything to do with wavelength? What is the wavelenth of black color?