Using this relay unit might kill your precious M5Stack Atom Lite sooner or later. A bit scary, so now let me share my random thoughts about it. This relay unit is designed to operate with a 5VDC ...

This is a low-level 5VDC 2-channel relay module with a standard interface that can be controlled directly by a microcontroller. Each input channel needs circa 5mA drive current, and each relay coil ...

For that reason, [Hulk] designed a simple relay module in order to cut the amount of time he spends implementing this solution in his various other projects.