We don’t know if it was cost or principle that motivated [Electronoobs] to build his own current clamp, but he did. This probe design is little more than a 3D printed case, an old power supply ...

[Daniel] wanted to power his current probe with a 5V input derived from the USB socket on his oscilloscope. This required the use of a 5 V to 24 V boost switching regulator – with two modules ...