Transistor based line follower

Let's Make Robots Robots
21

ok right :smiley: here it is

ok right :smiley:

 

here it is

22

only thing as I said…

only thing as I said… replace LED/LDR with QRD1114

 

a more complex robot could be made with KA339 or similar :smiley: this is a quadruple comparator a double comparator could do the trick

23

Thanks

Thanks alot! I really appreciate this. thanks for your time.

24

sure :slight_smile: hope you will make

sure :slight_smile: hope you will make something as cool as mine :slight_smile: you need a low powered gear motor anyway :smiley: and slow RPM

25

Regarding Schematics

Regarding you 4 sensor schematics, did you create a robot with 4 sensors? I don’t see how wiring the transistors like that would work. The voltage would always be the same. wouldn’t it?

and what is the sensor alignment is it example A or Example B?

 

Example A

|x

|x

                           

|x

|x

 

Example B

 

|x

                        

|x

 

|x

                       

|x

26

example A… yes this is

example A… yes this is like a simple 2 sensor based project but this like for example on the left if a sensor goes on black it slows the motor down… I transistor open, one close… current not flowing… if the curve is hard angled the second sensor will catch it again if the first interior sensor goes over… do you understand now the principle? on a simple black line both sensor are on white… transistor open…

27

I see

I understand the principle now. :smiley: shouldn’t have doughted you. thanks for your time and help.

The only upgrade was to insert a line following toggle switch to follow dark and light lines.

28

go on :smiley: I really want to

go on :smiley: I really want to see your design… there was a problem at dark light line :smiley: didn’t know how to make it :smiley:

29

**I will create a blog **

I will create a blog on how to create this line following switch. The nice part is that you can test the line follower with out having to engage the motor. :smiley: I’ll start working on the post then I will put a link as a comment on this page.

30

Line Following Toggle Switch

Since you helped I shall help you. Here are the directions to the simple line following switch to make the robot follow dark and light lines. Hope this helps :smiley:

Link: https://www.robotshop.com/letsmakerobots/node/20968

31

request not found… but…

request not found… but… aplying a resistance to base will make it work :smiley: no problem :smiley:

32

Was that comment aimed at me?

If the comment was aimed at me, I don’t get it. The line following switch will work.

33

the link is not working :stuck_out_tongue:

the link is not working :stuck_out_tongue: that was what i mean

34

Easy fix

Just Go to blogs and look for line following switch. Then Tell me what you think. Test it on your robot to see if it works, which it will :stuck_out_tongue:

35

omg there are lot of pages

omg there are lot of pages :frowning: btw :smiley: I’ll figure out some later :smiley: now I use amega and attiny2313 :smiley:

36

Sergey_M

Cool design)

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tell me what program did 3d model?

37

that is Autodesk Inventor…

that is Autodesk Inventor…

38

Hi! Thanks a lot for your

Hi!  Thanks a lot for your cheap project which is great and simple. I also have a tank and will use this circuit.

Keep posting new ideas for us my friend and I like your design too. :smiley:

39

thanky you for your comment

thanky you for your comment :smiley:

40

Motors

If I am using 4 or more sensors could I use the faster GM8 motor instead of the GM2?