Shake it, baby

OK, I got a shakelight flashlight for Christmas. Now the shaking
idea is better than no light in an emergency, but obviously a loser
for everyday use. Who wants to design the charger with an external
coil and a small oscillator to drive it? Must not overdo it and
degauss the magnet.

 

OK, I got a shakelight flashlight for Christmas. Now the shaking
idea is better than no light in an emergency, but obviously a loser
for everyday use.

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I have also bought one from a travelling salesman from China. It costs
about $1.80 (RM7.00) and when I take a magnifying glass and examine the
inside, I found that the coil ended up no where. The small PCB just
housed a small resistor and a slide switch. There were also 2 3V
CR30XX batteries. From what I can see, the coil wound is less than a
layer as I can still see the plastic core.

There is no transistor or diode or .1F capacitor as described in other
posts in s.e.b. So I guess once the battery is out I'll need to
replace them with new ones. Or else I can shake till my arm breaks and
they won't be any light.

Allen

 

That is an amazing low price for a flashlight and a futility generator.