today announced the release of its new IS31FL3758 matrix LED driver, designed to meet the growing demand for high-performance, energy-efficient LED display solutions in various applications, including ...

This HAT is essentially a simple display with a basic input device ... So [Andrew] put the LED driver on the 3.3 V I²C bus. Despite the data sheet calling for 4.5 to 5.5 V, the setup worked ...