Our family has purchased two "bumper crop radios."

It is usually used as a receiver to pick up TV sounds and to obtain disaster information in an emergency.

This radio is battery-operated, but the batteries need to be changed quite often -- I use it every day and seem to leave it on a lot.

As expected, I thought, "This is a waste of batteries.

So I wired it to the battery box using the power supply adapter from a discarded phone in the junk box, but it did not work well.

' I thought, 'That's odd, isn't it?' I looked at the voltage with a tester and found that it was not even 0.1 volts. It seems to deteriorate over time surprisingly quickly.

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Suddenly, I disassembled a USB cable from a USB adapter I had purchased at a 100-yen store, which was lying all over the place in my house, and tried to wire it together, and it was a "hit

The radio emits a robust and energetic sound.

To be able to switch to batteries in case of a disaster, the wiring was done simply by hooking the lead wires to the electrodes without soldering.

So, we had to run a cable about 5 meters long to carry it around the room.

As it were, this is a hassle, but as an alternative to giving up the benefits of batteries, I think it's just how it is.

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I hold a Master's in Electrical Engineering.

I have had to work hard to obtain the title, but this is the extent to which it has helped me understand "electricity" in my daily life.