Cheap Power Supplies With Fake Chips Might Not Be That Bad

We all know the old maxim: if it’s too good to be true, it’s probably made with fake components. OK, maybe that’s not exactly how it goes, but in our world gone a little crazy, th…

Low-Frequency DC Block Lets You Measure Ripple Better

We all know how to block the DC offset of an AC signal — that just requires putting a capacitor in series, right? But what if the AC signal doesn’t alternate very often? In that case, t…