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Pegasus DewZap - Dual Channel Dew Heater Controller
Pegasus DewZap - Dual Channel Dew Heater Controller

Pegasus DewZap - Dual Channel Dew Heater Controller

by Pegasus Astro
SKU PEG-DEWZAP
$94.95 - $94.95
$94.95
$94.95 - $94.95
$94.95
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  • Dual Channel Control for Two Dew Heaters
  • 5 Amps Per Channel (10 Amps Total)
  • 0-100% Pulse Width Modulation (PWM) Output
  • Accepts 12V-13.8V DC Input
  • Compact 66mm x 66mm x 28mm Enclosure
2 in stock
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  • Description
  • FAQ
  • Specifications
  • In the Box
  • Downloads
  • Warranty

  • Pegasus Astro DewZap Dual Channel Dew Heater Controller

    The Pegasus Astro DewZap delivers efficient, reliable dew prevention in a compact 66mm x 66mm x 28mm package designed for any imaging rig. Its dual channels supply up to 5 Amps of current each via Pulse Width Modulation (PWM), providing precise 0-100% power adjustment for two separate dew straps from a standard 12V DC input. Powerful internal MOSFETs ensure there are no voltage drops, sending full power to your heaters when you need it most.

    Dual-Channel PWM Control: 5 Amps Per Channel

    The DewZap manages two independent heater outputs, each capable of handling a 5 Amp load. Instead of using inefficient resistors, it employs Pulse Width Modulation (PWM) to digitally control power from 0-100% with a simple turn of a knob. This modern digital approach prevents voltage drops, ensuring your dew straps receive the full input voltage for maximum heating efficiency, even at partial power settings.

    • 10 Amps Total Capacity: Run two high-power dew straps for a large primary mirror and a secondary mirror or guidescope simultaneously.
    • Zero Voltage Drop: Powerful MOSFETs on each of the 2 channels guarantee that the output voltage matches the 12V-13.8V input, unlike simpler resistor-based controllers.
    • Reverse Polarity Protection: The controller is internally protected against accidental reverse power connections, safeguarding your equipment in the field.

    Compact 66mm Design with 2 RCA Outputs

    Engineered to be unobtrusive, the DewZap's rugged enclosure measures just 66mm x 66mm x 28mm. Power is supplied via a common 2.1mm center-positive socket, and the two heater outputs use industry-standard RCA connectors for broad compatibility with most dew straps on the market. A dedicated LED for each channel provides an immediate visual indication of the power level, glowing brighter as you increase the output.

    • Standardized Connections: The 2.1mm power input and 2 x RCA outputs make it a simple drop-in replacement or addition to your existing setup.
    • At-a-Glance Monitoring: Individual LED indicators for each channel allow you to confirm power levels instantly without disturbing your imaging session.
    • Multi-Purpose Outputs: Beyond dew control, the regulated 12V PWM outputs can be used to adjust the speed of telescope fans or control the brightness of a calibration flat panel.

  • What kind of power supply does the Pegasus Astro DewZap require?

    The DewZap operates on a 12V-13.8V DC power source. You can use a portable 12V battery pack or a mains AC-to-DC adapter. The power input connector is a standard 2.1mm center-positive socket.

    Can the DewZap power two large dew straps on my 11" SCT?

    Yes. Each of the DewZap's two channels can supply up to 5 Amps of current. This is more than sufficient to power large dew straps for primary mirrors, corrector plates, and large objective lenses, allowing you to run a heater on both your main telescope and a large guidescope or secondary mirror cage simultaneously.

    What is Pulse Width Modulation (PWM) and why is it important for the DewZap?

    Pulse Width Modulation (PWM) is a digital method of controlling power. Instead of reducing voltage (which wastes energy as heat), the DewZap rapidly switches the power on and off. By adjusting the "on" time (the duty cycle), it precisely controls the heater's output from 0-100%. This is highly efficient and ensures your heaters receive the full input voltage, making them more effective at preventing dew.

    How do I know how much power the DewZap is sending to each heater?

    The DewZap has a dedicated LED indicator light for each of its two channels. The brightness of the LED corresponds to the power output; it will be dim at low settings and grow brighter as you turn the knob to increase the power towards 100%.

    Will the DewZap work with dew straps from other brands?

    Yes. The DewZap uses industry-standard RCA power outlets. As long as your existing dew straps use a male RCA plug and are designed for 12V operation, they will be fully compatible with the DewZap controller.

    Can I use the DewZap to control the fans on my Dobsonian telescope?

    Yes. The PWM output is also suitable for controlling the speed of 12V DC fans. You can connect a fan with an RCA plug to one of the channels and use the knob to adjust its speed for faster or slower mirror cooling.

  • Supply Voltage 12V - 13.8V DC
    Power Input 2.1mm Centre Positive Socket
    Output Channels 2
    Power Outlets 2 x RCA
    Output Power Up to 5 Amps per channel (10 Amps total)
    Output Signal Pulse Width Modulation (PWM) Duty Cycle
    Dimensions 66 mm x 66 mm x 28 mm

    • DewZap Controller

      × 1

    • DewZap Quick Installation Guide

      × 1

  • Pegasus Astro 2-Year Warranty