I'm using an Arduino Due to write to TLC5971 devices, which are being powered by a GW Instek GPS-x303 power supply (Vcc=17V). Currently, I'm having issues running the LEDs for long time periods (~24hrs).
If I write to the device only once, they tend to randomly shut off sometime during the night. However, if I write to them continuously (every minute or so), they will periodically change their brightness and remain that way (despite the Arduino writing to them) until I turn off and on the power supply. I've used a logic analyzer to check the Arduino and can't seem to find any flaws with any of its SPI functions.
The devices are running at 37C with high humidity, but the above effects have been observed under standard conditions as well. We are also not running colored LEDs; instead, each channel is connected to a series of 5 SMD LEDs.
Any thoughts or suggestions?
