How efficient are modern codecs? Can we ever work out whether the power use of compression algorithms is a net gain for global power consumption? Come on a thought experiment with me. I have invented a new image compression format. It shrinks images to 50% smaller sizes than AVIF and is completely lossless. Brilliant! There's only one problem - it is 1 million times slower. If it takes your computer 10 seconds to compress an AVIF, it'll take 115 days to compress using my new format. Is…
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Every few years, a dodgy stat does the rounds claiming you can save £££ if you switch off all your gadgets at the wall. The standby mode of your TV is bleeding you dry!!! Energy Saving Trust@EnergySvgTrustA quick way to #saveenergy at home is to turn off tablets, laptops and consoles as soon as you stop using them, and ideally unplug them.This is a big potential #energy saver and could save you up to £30 a year.Find out more here:ensvgtr.uk/pS1ut#EnergyEfficiency pic.x.com/q2CWdlkaBH❤️ 9💬 3🔁 01…
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I never get power cuts. But, we've had two in the last week. They've both been fixed quickly, but it takes an age for my cable modem to reboot - and then an age for my smarthome to reconnect to the WiFi. So it was time to invest in an Uninterruptible Power Supply (UPS). My friend Paul Curry recommended the APC SMT1500i. It usually retails for around £700, but I found a refurbished one for £200 Let's put it through its paces! It's a chunky monkey! And weighs about 25Kg. So best set it on t…
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Our domestic solar panels have generated more electricity in a year than we have consumed. We installed 5kW of solar panels on our roof in 2020. Half are East-facing, half West-facing. Over a full year, they've generated 4,165kWh. By comparison, the average UK household uses about 3,800kWh of electricity per year. But working out exactly how much we've used is slightly trickier. We have a smart meter which reads our import and export. And a generation meter which shows how much we've…
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A few years ago, I took part in a local trial to install a solar battery in our home. The battery was excellent - and made a reasonable difference for our energy use. Sadly, last year, it died. It was prototype hardware, and these things happen. Moixa offered to replace it with an updated model - which was generous of them. While we were waiting for the new model to come in to stock, we moved house. Then COVID happened... Anyway, long-story-short, we now have a shiny new 2kWh battery…
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It has been four years since Unicode officially accepted our Power Symbols proposal into the standard. Now I’m delighted to announce that users on iOS 14 are finally able to use the full set of Power Symbols. ⏻ ⏼ ⭘ ⏽ ⏾ They’re available to use in the browser, in emails, and messages. Here’s how they look, in both dark and light mode: Terence Eden is on Mastodon@edentAnyone with iOS 14 able to see these 5 symbols?If not - who do I still know at Apple that is willing to listen to me grouch at …
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The good folks at Ntonpower have sent me this utterly ridiculous, and fantastically over-powered USB charger. It has ten frickin' ports each one capable of delivering 2.4 amps. So, what's it like? Straight up, it looks like a plastic toast rack. It's a chunky beast, but surprisingly lightweight. You won't have trouble lifting it, but it stays firmly in place. Round the other side are 10 USB ports. Well spaced out, not too cramped. It might be nice if they lined up with the rack, but…
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I've been sent a couple of Sonoff smarthome gadgets. You can read my review of the S20 WiFi plug socket and the POW in line power controller. Here's a video of me controlling them from my Amazon Alexa: The latency seems a little slow - hard to tell if that's Amazon only relying on US data centres for Alexa skills, or the connection to my home. Once set up, it works well. Oh... but the set up experience... Set Up I'll be honest - configuring a smarthome for voice control is still …
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The good folks at Sonoff have sent me a bunch of kit to review. See my previous review of the S20 WiFi plug. This is the Sonoff Pow - a WiFi enabled in-line power switch. Set Up Wiring up the Pow is relatively easy. The cover to the terminal block is secured with a simple screw. I found the opening a little cramped - but it's easy to open up the entire unit. Which gives us a full view of the circuitry. There's an unpopulated header on the bottom left - yup - this thing is hackable! A …
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My solar panels deliver pure Direct Current electricity into my house. All my house has Alternating Current circuits. Therefore, I need an inverter to change the DC to AC. This is inefficient. Most of the electronic devices I own are powered by DC. So I plug little wall-warts into the AC sockets to convert back to DC. This is also inefficient. One of the DC devices I'll be getting soon is the Maslow Battery. It's like the Tesla home battery. A several kWh array which can power my home…
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I've just launched a campaign to get the IEC Power Symbol into Unicode! A couple of months ago, I asked this question on HackerNews I was looking for the electrical "standby" symbol - AKA IEC5009 / IEEE1621. You know, the circle with the line through it. The one that's on every single bloody piece of electronic equipment produced since the mid-1970s. It's not in the Unicode standard. I can, if I want, have a snowman ☃ or a reversed rotated floral bullet ☙. What other useful and/or imp…
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Last year, Liz and I took the plunge and had Solar Panels installed on the house we rent out. I've been tracking their progress, and so now it's time for our yearly update. We based our estimations on the Europa Solar Calculator which estimated that they would generate around 2,700 kWh per year. Annoyingly, we haven't been able to hook the panels up to the Internet, so I can't get daily readings. So, every three months we have to manually look at the meter. Last month, after a year of…
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