Ever wondered what happens when you switch on your bench supply, even when its output is set to OFF?

Some supplies produce a nasty spike, powerful enough to damage sensitive circuits 😳⚡️

This #gwinstek GPE-4323 isn’t bad: into a 120R load it peaks at -4V and most energy is gone after 500ns.
Some cheap supplies, however, can be much worse.

So be careful out there and if you have a fancy digital oscilloscope, use some of that fanciness to test how your bench supplies perform. (Spoiler alert: Cheap isn’t always good ☺️👍🏼)

#electronics #testandmeasurement #siglent #hamr #hamradio #engineer #rfengineer #electronicsworkbench #electronicsengineering