Let's Make Robots!

Rodrigo the photopopper

Navigate toward light


  • Lenght: 8 cm
  • Width: 6.7 cm
  • Height: 4 cm
  • Weight: 34 g



Work in progress



2 Solarbotics SCC3733 - 37 x 33mm Polycrystalline Solar Cell 14,60EUR
1 74HC240 CMOS Inverted Octal Bus Buffer 1,00 EUR
2 Micro-motoriduttore, rapporto 81:1, 370 RPM 26,40 EUR
2 Fotoresistenza LDR 07, ø 5 1,50 EUR
    43.50 EUR

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wow i think this is the first solar powered robot on LMR, iirc

so no controller at all.. cool!

Btw, i saw you're italian.. I've always said it, italians do it better :) All your robots are quite original and interesting.
Good write-up!
What is the voltage/amperage you are seeing from those 2 cells indoors? I have future plans for a solar robot and I have been looking at cells.

 those are two solarbotic SCC3733

rated 6.7V , 15mA


I love the use of the logic chip as a control mechanism.  This is a nice change to all of the uProcs that we all use.

Great work and can't wait to see more.

EDIT: I did a bit of searching since I was damn curious about how the logic behind this worked and found an article on the sb board that goes into a similar design using the 74hc240 chip.


This helped me to understand a bit more of how the chip was utilized. Again, I have to say, great work on this design noise0. :)

I think this will help others in utilizing solar power in their bots.

nice job, can you make it follow a black line instead of a white one?
This is such an awesome little bot, way cool noise0!
Very nice!