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Green rectangular circuit board with black electronic components and gold edge connectors

SMUGDESK

SMUGDESK MAX31865 V2.0 RTD-to-Digital Converter Module

SKU CH-43Q2-KYP0A

Converts PT100 and PT1000 platinum sensors to digital data via SPI for 3D printer hot ends

  • High-precision RTD conversion with MAX31865 chip
  • PT100 and PT1000 sensor support
  • SPI interface for stable signal transmission
  • Compatible with SKR V1.4 and SKR 2 boards
  • Overvoltage protection and fault detection built in

Purpose & Audience

The SMUGDESK MAX31865 V2.0 module converts PT100 and PT1000 platinum sensor signals into digital data for 3D printer hot ends and heat beds. It targets printer builders upgrading thermistor-based systems to industrial-grade resistance temperature detection. Buyers who need thermocouple support or wireless sensor integration will not find those functions here.

Thermals, Noise & Power

The board draws minimal power from the printer mainboard and produces no audible noise because it has no moving parts. Overvoltage protection rated to ±45V shields the converter from transient spikes during normal printing sessions.

Sustained Load Behaviour

During long, high-temperature prints the SPI bus maintains stable, interference-resistant communication with SKR V1.4 and SKR 2 boards. On-board fault detection continuously flags open or short circuits on 2-wire, 3-wire or 4-wire sensor leads, preventing silent drift over extended runs.

How it compares

Measured against everything we stock in Serial & Protocol Converters, at today’s prices. Recalculated every night.

Price $28.99
Pricier than about 62% of the 121 comparable items (median $19.99).

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Specifications

No published specifications for this item yet.

Questions about this item

How do I connect the module to my SKR V1.4 board and what wiring step is often missed?

Wire the module to the SKR V1.4 SPI pins, then set the on-board DIP switches for your sensor type — PT100 or PT1000 — and the correct wire count: 2-wire, 3-wire or 4-wire. The step most often missed is matching the DIP setting to the actual sensor wiring, which causes reading errors.

What part will need replacement first during long-term use?

The platinum sensor — PT100 or PT1000 — is the only wear item. The converter board itself has no moving parts and includes overvoltage protection up to ±45V, so it typically outlasts the sensor.

What limits continuous high-temperature operation first?

The ±45V overvoltage protection threshold is the first hard limit. If the sensor circuit exceeds that voltage during sustained heating, the module shuts down to prevent damage.

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