Elektor Summer Circuit 2022, I found some interesting circuits

[sporniket]

I bought this special issue that is filled with lots of various circuits, and I found some of them interesting enough to tell you about it. You can find some of them there : Elektor Magazine, Summer circuits 2022

So, the circuits that I find noteworthy :

• A milliohm meter, as such measuring device is regularly mentionned when trying to locate a short circuit on the PCB.
• A dual power supply (5V and 9V), in relation with the fact that our favorite computer needs one too.
• A circuit that extract the residual energy from regular AA and AAA batteries by combining them in parallel to minimize their individual load.