What are sinking and sourcing, and which should you use?

If you work with digital DC circuits, you'll want to know.

This short technical note defines sinking and sourcing, shows you why to choose one rather than the other, and answers these questions:

• When is it more cost effective to choose sinking over sourcing?
• What effect does an existing electrical panel have on your choice?
• What do you do if you have a mix of devices wired differently?