Do you have a rig or server that requires many high RPM fans for cooling? The ESP32andmore.com I2C Fan Extension board is perfect for you. It is especially useful in large crypto mining rigs and large AI servers that support many power-hungry heat-generating GPUs.

The board has eight 4-pin Intel compatible Molex-KK fans headers that allows control of PWN fans and monitoring tachometer signals.

It also provides up to 48 amps of total power, 6 amps to each connector via two 6-pin PCIe power connectors (one or two PCIe cables can be used depending on the total amperage required).

On-board is also a Texas Instruments TMP1075 temperature sensor with an accuracy of ±0.25°C (typical) from −55°C to 125°C.

The Board measures a mere 54mm x 44mm and comes with a 3D printed case for safely mounting in your rig, rack or enclosure.

The board supports a standard I2C interface that allows easy interfacing to many processors and computers via a JST-SH connector in the QWICC/Stemma QT pin format. A second pass-thru JST-SH is on-board which allows daisy-chaining of multiple I2C PWM Fan Extension Boards together without the need of an I2C Mux.

The unit is compatible with other ESP32andmore.com controller boards such as the ECB and Coolboxx II. The command and monitoring interface is simple allowing integration to any host using the Wire or other I2C libraries. ESPHome, Arduino, and other drivers are available.

In addition, the board has an Arduino compatible microcontroller on-board which allows it to operate in a standalone mode and utilizing the I2C bus as a master allowing input from other sensors and I/O.