Paco
@ March 12, 2009
Seeks light track
Cost to build:
$25
Time to build:
5 hours
URL to more information:
Weight:
11 grams
- Actuators / output devices: 2x pager motor
- Control method: 2x 1381 solar engine
- Power source: 1/2 solar cell
- Sensors / input devices: 2x LDR
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
@ Sat, 2012-01-07 09:56
hi friend wat is the use of
hi friend wat is the use of trimmer & how to use it? as i am trying to make a light follower same as yours.
@ Sun, 2009-03-15 05:20
wow thats pretty good for
@ Thu, 2009-03-12 23:40
I have a couple photopoppers
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).
@ Thu, 2009-03-12 22:59
Excellent
@ Thu, 2009-03-12 23:20
videos are in real time.i
videos are in real time.
i have not yet measured the charge/run ratio :)