Let's Make Robots!

Paco

Seeks light track

Use two motors with separate solar engines; rely on differential sensors to achieve a goal. Poppers are essentially just pairs of solar engines mounted together with motors; they seek out bright sources of light through the differential action of the two solar engine motor pairs.

 

  • Lenght: 5.3 cm
  • Width: 5 cm
  • Height: 4 cm
  • Weight: 11 g

 

































Components

Qty   Cost
1/2 Solarbotics SCC3733 - 37 x 33mm Polycrystalline Solar Cell 7,30 EUR
1 Cap 1000 uF 1.00 EUR
2 Transistor PN3904 NPN 0,60 EUR
2 Transistor PN3906 PNP 0.60 EUR
2 LDR 07, ø 5 1,50 EUR
2 Voltage detector 1381 4,80 EUR
1 Trimmer 4,7K 0,50 EUR
2 Solarbotics Regular Pager Motor 2 12,40 EUR
    28,70 EUR



Schematic

attachment.gif

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

hi friend wat is the use of trimmer & how to use it? as i am trying to make a light follower same as yours. 

 

 

 

wow thats pretty good for solar power.

I have a couple photopoppers too. Surprisingly entertaining little things. Mine are of the Fred/FLED engine variety, acquired some years ago from this guy.

Mine move a lot slower than that, charging for 10-30 seconds (depending on lighting) then running one motor for <1 second. I suppose I could replace the 2200uF cap with a smaller one to speed up charging times (and reduce motor run time).

We like this. What's the charge time / run time ratio? Are those videos in real time?

videos are in real time.

i have not yet measured the charge/run ratio :)