Technology Connections — Best Videos According to Hacker News

explainer

Heat Pumps: the Future of Home Heating

Technology Connections

“Start here for a good introduction to heat pumps and how they are so efficient”

17 HN recommenders · 2021–2026

explainer

Detergent packs are kinda wishy-washy (Dishwashers Explained)

Technology Connections

“I highly recommend you watch this video by Technology connections[1], I too used to think I had to rinse my dishes before putting them in the machine.”

15 HN recommenders · 2021–2025

explainer

The Antique Toaster that's Better than Yours

Technology Connections

“In case you haven't seen this video of a toaster from the 60s before, you're in for a treat”

12 HN recommenders · 2019–2025

explainer

Why Heat Pumps are Immensely Important Right Now

Technology Connections

“If you want an (entertaining) deep dive into heat pumps, I can recommend Technology Connection's”

9 HN recommenders · 2022–2023

explainer

I messed up. You're using too much detergent.

Technology Connections

“the two Technology Connection videos on dishwashers are must watch”

10 HN recommenders · 2021–2025

explainer

Brown; color is weird

Technology Connections

“made me watch a 20 minutes videos on the color brown and makes it feel like magic”

8 HN recommenders · 2020–2026

explainer

The LED Traffic Light and the Danger of "But Sometimes!"

Technology Connections

“I love Technology Connections' take on this line of argument [0]”

7 HN recommenders · 2019–2024

explainer

Longer-lasting light bulbs: it was complicated

Technology Connections

“highly recommended if you want an engineers perspective, with no 'great conspiracy' hype.”

9 HN recommenders · 2023–2026

explainer

Ground Source / Geothermal Heat Pumps and Other Info

Technology Connections

“He made several excellent videos explaining residential heat pumps”

6 HN recommenders · 2021–2026

explainer

You are being misled about renewable energy technology.

Technology Connections

“Alec Watson’s recent, and excellent, Technology Connections YouTube piece on renewable energy.”

12 HN recommenders · 2026

explainer

Old-fashioned rice cookers are extremely clever

Technology Connections

“I had no idea they were so clever, combining thermodynamics and the physics of magnetism.”

6 HN recommenders · 2020–2025

explainer

Old pinball machines are amazingly complex

Technology Connections

“I shared it with everyone I know, and now I'm sharing it with you”

6 HN recommenders · 2023–2026

explainer

Heat Pumps are Not Hard: Here's what it will take to start pumping

Technology Connections

“If you want an (entertaining) deep dive into heat pumps, I can recommend Technology Connection's”

5 HN recommenders · 2022–2023

explainer

Drip Coffee Makers — super simple, super cheap

Technology Connections

“Anyone interested in how the traditional american coffee maker works should watch this.”

7 HN recommenders · 2022–2024

explainer

Why don't Americans use electric kettles?

Technology Connections

“Technology Connections on YouTube has a good video about how electric kettles are the superior way to boil water”

5 HN recommenders · 2022–2025

explainer

Your dishwasher is better than you think (tips, tricks, and how they work)

Technology Connections

“I’ve sent dozens of people the Technology Connections video on this topic to rave reviews”

6 HN recommenders · 2024–2026

explainer

Electric car chargers aren't chargers at all – EVSE Explained

Technology Connections

“A quick intro into EVSE and why there is no power 'charger' in them”

4 HN recommenders · 2021–2024

explainer

Portable Air Conditioners - Why you shouldn't like them

Technology Connections

“If you are in the market for a portable AC I highly recommend you watch this video first”

5 HN recommenders · 2020–2026

explainer

Humidifiers: Simpler is better?

Technology Connections

“Technology connections covers quite a bit of ground on various types of humidifiers and their up/downsides”

5 HN recommenders · 2021–2026

explainer

Perhaps the weakest link in the US electrical system

Technology Connections

“here's a 25 minute mini-documentary of the US electrical system's history and problems”

4 HN recommenders · 2021–2025

explainer

The US electrical system is not 120V

Technology Connections

“There's a lot of misconceptions about US electricity. This video does a nice job at pointing out the good and the bad.”

4 HN recommenders · 2021–2026

explainer

A Complete Beginner's Guide to Electric Vehicles

Technology Connections

“I was particularly swayed by the technology connections video on this topic I watched before buying my first EV”

3 HN recommenders · 2022–2026

demo

LED Experiments: Making Holiday Lights Less Garish

Technology Connections

“we can't talk about LED christmas lights without linking to this video by tech connections”

3 HN recommenders · 2021–2024

explainer

Old car headlights were all the same — which was a fairly bright idea

Technology Connections

“has, as so often the case, a great video about why old car headlights were the shapes they were”

4 HN recommenders · 2022–2023

explainer

The Superheterodyne Radio: No really, that's its name

Technology Connections

“This video is a great explainer (and I also highly recommend every other video on the channel)”

3 HN recommenders · 2019–2024

demo

E-Ink on Android, and other new things!

Technology Connections

“Technology Connections on youtube tried to use an eink display and thoroughly described his experiences.”

3 HN recommenders · 2020

explainer

The Antique Microwave Oven that's Better than Yours

Technology Connections

“it explains how microwaves use a humidity probe to sense steam escaping from say a microwave-popcorn bag to determine when its done.”

7 HN recommenders · 2020–2025

tutorial

The Best Easy Way to Capture Analog Video (it's a little weird)

Technology Connections

“does some good coverage of capturing/converting analogue video - hardware choices make huge difference.”

3 HN recommenders · 2019–2022

explainer

The Computer-free Automation of a Jukebox (Electromechanics)

Technology Connections

“The computer free automation of a jukebox from the 1970s is an eye opener”

2 HN recommenders · 2020–2021

explainer

How Analog Color TV Works: The Beginnings

Technology Connections

“This one on "how analog tv works" I thought was especially good.”

2 HN recommenders · 2019–2026

explainer

Thermoelectric cooling: it's not great.

Technology Connections

“they are _massively_ less efficient.”

3 HN recommenders · 2025

explainer

Why Sony's Beta Videotape System Failed--and failed hard (Part 1)

Technology Connections

“Here's a very good video going into details”

2 HN recommenders · 2022–2026

explainer

The Senseless Ambiguity of North American Turn Signals

Technology Connections

“did a very informative (though a bit ranting) video on them in the US. Worth a watch and really interesting.”

2 HN recommenders · 2020–2024

explainer

Power is not energy: why the difference matters

Technology Connections

“Technology Connections made a pretty good 52 minute video about it the other month”

2 HN recommenders · 2025–2026

commentary

Algorithms are breaking how we think

Technology Connections

“Technology connections recently made a really good exposition of that issue”

2 HN recommenders · 2025

explainer

The simple, clever sensor behind automatic windshield wipers

Technology Connections

“Technology Connections has a good video on how traditional automobile rain sensors work”

2 HN recommenders · 2024–2026

explainer

How to design an actually good toaster with lessons from the 1940's

Technology Connections

“This one about Sunbeam toasters from 50+ years ago is particularly great”

2 HN recommenders · 2022–2024

explainer

Forced-air Furnaces: The What, Why, and How

Technology Connections

“For a full on description of how a good portion of furnaces, tech connections made a video not long ago”

2 HN recommenders · 2021–2026

explainer

Awnings: a simple cooling tech we apparently forgot about

Technology Connections

“Technology Connections just did a video on awnings.”

2 HN recommenders · 2024–2025

explainer

The LED's Challenge to High Pressure Sodium

Technology Connections

“Here's a quite good video about the pros and cons of LED vs high/low-pressure sodium street lamps”

2 HN recommenders · 2018–2021

explainer

Why it's not possible to synchronize turn signals (but also absolutely is)

Technology Connections

“The TC channel is definitely a hacker's eye view in to all the technologies that we take for granted every day.”

1 HN recommenders · 2021–2024

documentary

The CED: RCA's Very Late, Very Weird Video Gamble (Pt. 1)

Technology Connections

“is absolutely fascinating. The depth of research rivals any educational program on TV.”

1 HN recommenders · 2019–2025

explainer

Batteries aren't the only way to store energy. Here's another.

Technology Connections

“Technology Connections has an interesting video about pre-cooling”

1 HN recommenders · 2021–2023

explainer

A simple water heater is more clever than it seems

Technology Connections

“Technology Connections did a good video about them recently.”

1 HN recommenders · 2023–2025

explainer

Chest Freezers; What they tell us about designing for X

Technology Connections

“Technology Connections did a decent video that covers freezer design decisions like that and others”

1 HN recommenders · 2020–2026

explainer

The step-by-step, mechanical logic of old pinball machines

Technology Connections

“It goes horribly in-depth (in a good way).”

1 HN recommenders · 2024–2025

explainer

These Are Not Pixels: Revisited

Technology Connections

“Definitely worth the watch.”

2 HN recommenders · 2018–2023

explainer

Lessons from a Can Opener

Technology Connections

“it's made me actually think about can openers a bit now. You might find it interesting, too.”

1 HN recommenders · 2022–2023

explainer

Lines of Light: How Analog Television Works

Technology Connections

“He actually demonstrates how the beam is redirected by the electro-magnets wrapped around the base of the tube. It's very cool.”

1 HN recommenders · 2021–2026

explainer

The Weird World in RGB

Technology Connections

“This video from Technology Connections helps explain”

1 HN recommenders · 2020–2021

explainer

LCCS: The LCD / CRT Hybrid from JVC

Technology Connections

“There's a neat breakdown of the tech on this YT channel”

1 HN recommenders · 2020–2025