An originally original gameboy. Still worked until about 2 years ago. I assume there's just a little battery or a capacitor that needs replacing, but I haven't had the time to look into it.

I'm still the original owner of one of these 1982 Pac-Man consoles. Actually, I thought it was lost for decades but my aunt discovered it during a basement clean out and gave it back to me. Last I checked, it still worked. But the volume is so dang loud that I remember I always had to play with it outside.

Don't know if it counts, but my suitcase record player has vacuum tubes. Still spins but it needs a needle.

I still have a CRT from the early 90s and all my old video game consoles.

Either my TI-99/4A, or if it still works, the IBM 7072 that I got from NYIT for $200 in 2000.

Our old pong console. I don't know if it still works because it's been boxed up for over a decade at this point.

Oldest in use? Probably my old texas instruments graphing calculator, but it's dying. I got it back in the early nineties for college, and my kid was using it last year with homework, but the screen is failing and it sometimes just freezes until you pull and replace the batteries. So only kinds in use, and barely hanging on.

My VCR is newer and still sees use rarely, but was used daily for a few years in the early naughties.

Wait! The phonograph! It's still functional and my dad got it in the early eighties, so it's older than the pong console, but I think calling it electronics is dubious, so I dunno if it counts. But it's the oldest functional electric powered thing we have that I know of.

1962 fender brownface pro-amp

Casio f-91w watch. Its like 6 years old now, so the battery only has like 4 more years left.

I have a lamp my grandfather made out of an old moonshine jug in like the 40s.

Casio CZ-1 synthesizer, produced in 1986.

My speakers by far

Probably my Canon AE-1. Not sure of the exact year, but the model was made from roughly '76 to '84.

Got my aunt's rotary phone in the closet.

My Nintendo dsi. Since 2009

Game Boy Advance with a Pokemon Sapphire cartridge that I don't think has been removed in over a decade. Every time I turn it on I always wonder how I spent so many hours staring at a screen with no backlight.

My TI-84 calculator.

Lost a lot of cool old stuff in a fire a few years ago, so I'm guessing my original N64.

20 GB hard drive from 2006.

Next year we're going to have a party for it.

A Bell & Howell 8mm/16mm projector and a handheld super 8 video camera that belonged to my dad. I'm not sure how old they are but probably late 70s/80s. From what I gather, he was very much into manual film editing.

A panasonic lumix dmc-fz50 that I got from my mum after she got her new camera. It's from 2007, so not that old, but still, it's only three years younger than me. It takes pretty good photos for it's age, especially macro shots. It's biggest flaws are the display and view finder. The image in the view finder got yellow and foggy with time, to the point it's almost unusable. And the display is rather dark so it's no good in sunny weather.

I have my old Speak & Spell. It still works.

Probably my dad's electric turkey carver. It was a wedding gift he got in 1980

Fridge. Older than me

Probably either my Olympus OM-1 or my Minolta SR-T 201. Both still work (the Olympus just needs some cleaning and maintenance)

I have a CRT from 1995. Aside from that, probably my dad's turntable which has unofficially become mine, or the Yamaha electric keyboard

Either the wood-grain radio with clock or a 1970s bubble-LED calculator

I have a Milton Bradley Microvision from around 1979, the first handheld game system that used cartridges. I have the block breaker game, it still works but I think some components are wearing out as the game speed feels way too fast. Thing takes 2 9V batteries!

Sega Megadrive from about 1989.

Not a full electronic per se, but I do have a heatsink from an old second gen IBM memory module.

A Nintendo64 with several game cartridges. It's a little flaky, but it still works for the most part.