[sdiy] DBeam schematic

[prophetfive2004]

Hello,

I try to understand the schematic that someone send me last Saturday on the
Sdiy mailing list
 and I don't understand why the author place a 100µF
capacitor (on the top, at the left on the schematic), why did he place it
here ?

If you have an idea
 

Thanks

 

Best regards 

Julien.

 

Here is the schematic
http://www.stoffelshome.de/pic/gla/dyn_ir_sensor_schaltbild.gif

 

 

 

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