https://www.theastroimagingchannel.org/ Presented by Steven Sagerian
-Brief explanation of what causes dew, and ways of combating it.
-Design parameters for a dew heater system
-Building a dew heater controller
-Building many dew heater elements and doing it safely
-Connectors, connectors and cigarette lighter plugs
-Power requirements for your new system, subtitled "purchasing a new deep cycle battery"
-"Best ever!", cheap stuff from china and where to get it.

Link to Spreadsheet...https://drive.google.com/file/d/0B7iG...