Light Following Robot

Let's Make Robots Robots
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The gear motor wheels, multi-directional wheel and the plastic sheet. I cut out 6 x 13 cm plastic for base.

Glued the wheels to make the body and connected the motors to the components.

After its completed. 

Robot Schematic

  

290×500

 

Light Following Robot without using microcontroller. This wheeled robot does not avoid collision. It runs towards the light or just brighter areas.

  • Control method: non-autonomous, moves toward the light or bright areas
  • Sensors / input devices: 2x LDR, 2x BC547 Transistors, 2x 2 x 30 ohms Resistors, 2 x Gear motor wheels, 1 x multi-directional wheel, 9 volt Battery.
  • Target environment: indoor
This is a companion discussion topic for the original entry at https://community.robotshop.com/robots/show/light-following-robot
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**Schematic **
Schematic please?

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Robot schematic is added.

Robot schematic is added. Its a very straight forward circuit. :slight_smile:

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Gratulation

Hello Irfan!
I simply and goodly congratulate!

Is the 30 ohms of resistance actual only 30 ohms ???


Oderlachs

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:slight_smile: I read the colors from a

Thank you :slight_smile: I read the colors from a calculator, its a tiny one. for this it doesnt matter if its bellow 100 ohm. I might be wrong about it been 30 ohm.

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We have a new “first robot”!

Wow! That robot looks great and performs great! Congrats on the build!

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Please Help

Hello there. I’m trying to do this as my project but something seems wrong can you please help?

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Please Help

Hello there. I’m trying to do this as my project but something seems wrong can you please help?

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about lightseeker

Hi man did you done this project ? i can help :slight_smile:

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works without light

I have triple checked my circuit and it works even without light.  Any idea what’s wrong?

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Need help with light seeking robot

Hi you mentioned you could help on this one.  I built it and triple checked the circuit but it works even without light.  Do you know why?

 

thanks!

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sorry for the late reply…

sorry for the late reply… can you share your diagram?

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share the exact components

share the exact components used and diagram so i can check…

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is something work with the circuit?Please Help!

So I created the model as you said.First I created only the left motor to see if it works and it didnt.When I connected the 9v Battery the transistor fried/heated up. So is there something work? btw i used a 22ohm Resistor since i couldnt find a 30ohms resistor at any shop. So please helpbtw your model is nice and i would like to have one like that too,so HELP! :smiley:

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The bc547 can only handle

The bc547 can only handle 100mA. That is not very much. A bc337 for example can handle 800mA.

If you have a multimeter you can measure the current your motor needs.

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so sorry all i was away for

so sorry all i was away for some time on a project. Let me make a simple how to vdo probably post next week. Thanks

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light follower circuit problem

Hi,

I tested the circuit with electronic simulator software.

i have the same problem works all the time (with light and no light)

to resolve problem, change 30 ohms resistor with 10k (worked correctly).

 

 

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Robot light follower

Hi,

Circuit problem!

i tested this circuit with electronic simulator software.

The motors are on all the time (light and no light)

To resolve the problem i replaced resistor 30 ohms with 10k (working fine)

1 Like
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I might have read the resistor wrong. thanks