Solar Watch

Using  a bit of scrap you can convert your old digital watch into a batteryless watch entirely based on solar energy.The concept being the solar charge is stored in the caps which run the watch even when there is no solar energy available.Although the charge lasts for a few hours in darkness(62mins to be precise)..still its a very good model to explain the very basics of a solar pv system.Happy tinkering….

The use of the zener is to limit the voltage drop across the watch.which should not go beyond 3v ..i chose a scrap diode from an old radio with the panel so my voltage apparently never went over 3v.

Hope you guys like it..


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