Main Menu

ATM
Automated Obs
WebCams
Sports Cars
Music
Froggy
FAQS
Gallery
Links
About Me
SpaceCam
Dobsonian
 

Section

Dome
Rain
Scope
ST8
sxv
Focus
Emulators
Software

 

 

 

 

 

 

  

The most active and innovative astrophotography forum in the world! 

Join QCUIAG today.

 

 
Rain

Back Up Next

For a rain sensor I etched a 4x8 inch PCB with 2 interlocking combs of tracks.   12V is applied to one side through a 1M resister.  The other side feeds a transistor base.  The Emitter is grounded and the collector fed through an optical isolator.  Rain provides a small current to the transistor base, which is enough to power, the isolator.  To stop dew from collecting on the detector a series of ceramic resistors warms the PCB. 
 

 

leaf

The Poor Meadow Dyke Galleries are now open.  

THE GALLERIES

 

 

See the full range of Atik cooled CCD cameras for astronomy on the Atik Website

 


Copyright 2006 Steve Chambers. All Rights  Steve@pmdo.com

  Back Up Next