Autonomous PID-controlled heating

Selectable 5-40 C target temperature

8-14 V low-voltage power input

Compact direct camera-module mounting

AMASCHR02 - Autonomous AllSky Camera Heating Ring

The AMASCHR02 is a compact heating ring for all-sky camera domes. It is designed to mount directly around the camera module, keeping the heater close to the optical dome surface where dew and condensation need to be prevented.

Unlike a simple passive heater, AMASCHR02 includes its own temperature sensing and regulation electronics. The ring can be powered continuously from a low-voltage supply and regulates its heating output automatically, without software setup or an external controller.

Key Features

• Autonomous operation: Built-in control electronics regulate the heater output automatically during normal operation.
• PID temperature control: The ring measures its own surface temperature and adjusts heating power to maintain the selected target.
• Configurable setpoint: Three solder jumpers select target temperatures from 5 C to 40 C. The factory default is 20 C.
• Simple power input: Operates from an 8-14 V supply with a maximum heating power of 4 W.
• Camera-module mounting: The mechanical layout is optimized for compact all-sky camera assemblies and Raspberry Pi camera modules.

Power and Control

AMASCHR02 is intended to stay powered during operation. When the dome or camera assembly is already warm, the controller reduces or stops heating automatically. In colder conditions, it increases the heater output up to the available 4 W maximum.

No host software, PWM output, or custom control loop is required. The only external requirement is a correctly polarized low-voltage power supply.

Typical Applications

• DIY all-sky cameras
• Anti-dew heating for small optical domes
• Raspberry Pi camera based sky monitoring systems
• Compact observatory and weather-camera builds

Specifications

• Supply voltage: 8-14 V DC
• Maximum heating power: 4 W
• Temperature presets: 5 C, 10 C, 15 C, 20 C, 25 C, 30 C, 35 C, 40 C
• Default preset: 20 C
• Power connector: 2-pin 2.54 mm header
• Inner diameter: 36 mm
• Outer diameter: 70 mm
• Mounting holes: 30 x 30 mm square pattern

Documentation

Detailed configuration, jumper settings, compatibility notes, and operating guidance are available in the AMASCHR02 documentation.