contrechoc:
Cooling device
contrechoc:
Solar Workshop
contrechoc:
Solar Workshop
contrechoc:
Solar Workshop
contrechoc:
Solar Workshop
contrechoc:
Solar Workshop
contrechoc:
Solar Workshop
contrechoc:
folding lamp
contrechoc:
pent lamp
contrechoc:
pent lamp2
contrechoc:
light to light
contrechoc:
folded soft energy lamp
contrechoc:
basic solar circuit - sound from velleman kit
contrechoc:
light to wind
contrechoc:
basic solar circuit - red LED in the dark
contrechoc:
transistor as a switch
contrechoc:
with a 555
contrechoc:
with a transistor
contrechoc:
555 timer
contrechoc:
ATtiny85 microcontroller
contrechoc:
transistor
contrechoc:
Led's in parallel
contrechoc:
Led's in series
contrechoc:
paper switch
contrechoc:
hand crank circuit
contrechoc:
hand crank circuits
contrechoc:
hand crank circuits
contrechoc:
hand crank circuits
contrechoc:
hand crank circuits
contrechoc:
hand crank circuits
