Here’s What It Means If You See Green Lights on a Car
From red stop signs to green lights on cars to colored balls on power lines, it’s all about knowing and understanding what ...
Hackaday11d
LED driver
For one thing, there was power compatibility to wrestle with. The Pi can sometimes work with I²C devices at 5 V, but this isn’t ideal long-term. So [Andrew] put the LED driver on the 3.3 V I²C ...