I like model trains and electronics.
My grandson really likes the trains and he is furiously learning how to run them properly. Their family got me a VIA locomotive and passenger car for Christmas. It would not run on my layout, so I took it into the hobby shop and had Digital Command Control installed. We got a second passenger car and at the same time, we got a large (6 wheel trucks) BNSF diesel locomotive with Sound and DCC. He quickly learned how to run it, use the horn and the bell. It is great for me when he is having fun with the trains.
On the electronics front, I was setting up a power supply for him to learn and use. I was testing current on my Digital Multimeter when I heard a POP. At first I thought it was the power supply, but no, it was the 440 mA fuse inside. This is easy to get at, so I removed it.
A quick Google Search for the actual part number yield lots of hits with prices ranging from $10 through $50 for one single replacement fuse. Fluke want $20. I finally ordered 3 from Newark Electronics at $10 each plus tax and shipping. They came today and I put one in the DMM and it is running fine
It is in my shop in my basement where I can test AC Adapters for laptops and determine how the work under load. A couple of years ago I got a Triplett 630 PLK analogue meter with a 10 A current range. This is formed with a heavy gauge wire shunt that siphons off only a tiny current to run the meter movement. This is great for testing the health of AA through D cells. Short the 10 A range briefly with the meter and see how far it swings. I can usually tell how good the battery is.
It is fun in my basement and especially so when my grandson is over here.
What kind of hobbies do you have? What experiences have you had?