A great example is this simple wireless AC current detector from [NEW PEW]. The circuit is a simple one, and a classic. The spring from a ballpoint pen is soldered to the base of a BC547 ...
As shown in Figure 1, on a single core wire, the AC current flows toward the left-hand side (1) and creates a magnetic field ...
Some results have been hidden because they may be inaccessible to you
Show inaccessible results