Untitled Document

Simple Dew Controllers

Just as the name implies, I have developed a line of simple dew controllers that will meet the dew prevention needs of the home astronomer. 

Available in multiple configurations and colors.

Each port of these 2 or 4 channel dew controllers can supply a maximum of 5A which is more than adequate for even the most demanding dew straps on the market.  Both the controller and power supply are each fused at 10A.*                                  

Electronics Warranty - 1 year
3D Printed Enclosure - LIFETIME*   If you break the enclosure for any reason I will replace it free of charge!


Secure transaction through PayPal

Choose Controller
Enter Custom Color:
Please allow extra processing time for custom colors.

Package Includes

-Simple Dew Controller
-Cigarette type power adapter 
   (5.5/2.1mm tip, 10ft, 10A fuse)
-Scotch Fasteners

Stock Status:
2 Channel 2S available now
Others ship in 2-3 days

4 Channel 4S

4 Channel 2S2E

4 Channel 4T

2 Channel 2S

2 Channel 1S1S

2 Channel 2T


-PowerPole input jack
-5.5mm/2.1mm center positive input jack
***Power jacks are input/output, so when power is supplied to one input, the other acts as a 12v output
-Each port can supply up to 5A
-Controller and power supply are fused at 10A
-Gold plated RCA jacks
-PWM (pulse width modulation) control circuit
-Overcurrent protection
-Stainless steel hardware
-PLA 3D Filament*

Specifications - PWM Module

PWM control module:
-Input voltage: 5v-28v
-Maxumum current: 5A
-Output current: 0-5A
-Maximum output power: 90W
-Overcurrent protection
-Reverse polarity protection
-Shut off with knob "click" (7mA residual current with power source on) 

Weight and Dimensions

- Weight
   -2 Channel:  ~5oz/142g
   -4 Channel:  ~8oz/227g
- Dimensions 
   -4 Channel 4S:                                 
       Enclosure - 135x62x36mm (135 x 77 x 36 overall)
  -4 Channel 2S2E:
       Enclosure - 110 x 77 x 36mm (125 x 101 x 36  overall)
   -4Channel 4T:
       Enclosure - 134 x 74 x 35mm (141 x 74 x 47 overall) 
   -2 Channel 2S:
       Enclosure - 90 x 62 x 36mm (97 x 74 x 36  overall)
  -2 Channel 1S1S:
       Enclosure - 86 x 72 x 36mm (95 x 105 x 36 overall)
   -2 Channel 2T:
       Enclosure - 90 x 70 x 33mm (90 x 90 x 45 overall)

*Although each RCA output can handle up to 5A, the total maximum current of the 4 Channel Controller is 10A.
*I will replace the 3D printed enclosure for as long as I have a 3D printer.  If I decide to stop selling and no longer have the printer, or my printer goes supernova, well, then I can't replace the dew controller enclosure.
*PLA Filament
-PLA is not usually recommended for outdoor use.  The stated reasons are because PLA isn't as temperature tolerant as other filaments and because the material can absorb a small amount of moisture.  
-However, I have been using a PLA printed enclosure similar to this for both a dew heater and Arduino Uno enclosure for over a year with temps ranging from -22F (-30C) to +114F (+45C) in a moderately humid environment and I haven't noticed any evidence of warping or other issues.  
-Don't leave the dew controller in direct sunlight on a very hot day for a long time, or in your car on a very hot day or some warping may occur.  After all, this is a nocturnal hobby!