Prescription Lenses for the HTC Vive

I've been using prescription lenses with my HTC Vive for a year now and they're fantastic. Wearing glasses is really inconvenient because adjusting the position of them can require taking the headset off, and they usually overlap badly with the headset lenses (so there are parts at the side I don't see and parts above and below that I don't need to see). With lenses on my headset all I have to do is put the headset on and I have normal corrected vision of virtual reality with no loss of view.

Virtual Reality Headset Prescription Lens Adapters for the HTC Vive

I purchased them from VR Optician (previously and would strongly recommend them for anyone using VR who wears glasses. They fit on top of the Vive display and are easily removable.


A month ago I was on holiday in Brisbane. I arrived in the early evening so I got a takeaway and attempted to check into my apartment. This took about an hour because the out of hours key safe wouldn't drop the card and they had also managed to give the room they planned for me to someone else.

I visited both the City Botanic Gardens and the Brisbane Botanic Gardens as well as the Museum of Brisbane and the Queensland Museum.

I went to Shorncliffe Pier and walked most of the way to Brighton along the coast. The suburb of Shorncliffe itself was almost deserted.

I walked the skywalk at Tamborine Mountain and along "Gallery Walk".

I spent a day at Currumbin Wildlife Sanctuary, taking lots of photos of Rainbow Lorikeets and walking around the Kangaroo enclosure.

I went to Redcliffe for a day trip to Moreton Bay with Brisbane Whale Watching. There were a number of whales around and I managed to get photos of them breaching.

On the last day I took a tour to the Sunshine Coast Hinterland & Noosa.

I took a few hundred photos and some videos. It was definitely worth the effort and space in my hand luggage to take my 100-400mm lens with me to get photos at the wildlife sanctuary and of the whales.

Shrinking liquid detergent

Persil have shrinkflated their liquid detergent products from {25,40,60} washes down to {24,38,57} washes. Their website hasn't been updated yet but the new products have appeared on Tesco's website.

They haven't reduced the size of a wash (it's still 35ml) but the initial price for 38 washes is £8.00 whereas 40 washes only costs £7.00. At over £6 per litre this is significantly more expensive than the usual special offer prices of £3.33 to £3.57 per litre.

Shrinking toilet paper

Less than two years since they last did it, ASDA have applied shrinkflation to their own brand toilet paper "Shades So Soft" again. This time the sheets are shorter and you get fewer of them. In April you could buy 24 rolls with a total area of 63.20m² for £8.00 but from May the same 24 rolls (also £8.00) have a total area of only 59.18m². That's 1½ rolls less paper for the same price. We're now down over 2 whole rolls of paper since 2016.

Contents: 24 rolls, 2 ply tissue. Average 210 sheets per roll. Sheet size 120mm x 104.5mm. Total area 63.20m².
63.20m² for £8.00 (2018-04-02)
Contents: 24 rolls, 2 ply tissue. Average 200 sheets per roll. Sheet size 118mm x 104.5mm. Total area 59.18m².
59.18m² for £8.00 (2018-05-02)

They're still advertising it as Bigger Pack Better Value too.

Laser Engraved Light Switch

I've used a laser cutter to engrave a light switch with symbols for the two switches outside my shower room:

  • Shower light and extractor fan
  • All other lights in the room
[White 2 gang light switch with a shower symbol engraved above the left switch and a light bulb engraved above the right switch]

Restoring a Garden Bench

More electric sanding, the remains of my mahogany wood stain and rubber feet... the second bench is now complete and back in the garden:

[Bench before starting work] [Bottom side of the bench after partial painting]

[Seat bars after painting] [Top side of the bench after partial painting]

[Bench outside on slabs next to the greenhouse]

[Euros Hoylake 2017]

Last week I was in Hoylake, England to watch the Scottish team compete. I took far too many photos.

There were a different mix of pilots from some countries this year and depending on how you calculate the top country, England is ahead of Germany. David Van Boven from Belgium won first place.

Garden Bench with feet

I've now added rubber feet (solid rubber door stops) to the first garden bench and put it back outside:

[Bench leg with rubber door stop on the bottom]

[Bench outside on slabs next to the fence]


A couple of weeks ago I was on holiday in Sydney. When I arrived it was early evening so I had dinner at the hotel and went to bed.

I walked across the Sydney Harbour Bridge and visited the art gallery and various museums. After buying a hat I walked from Bondi Beach to South Coogee.

Being winter at the time, the early nights meant that the Light events of the Vivid Sydney festival were open in the evening. It's a good thing I went to the Royal Botanic Garden before it started because there were a number of barriers restricting access for the duration of Vivid. They don't take them down during the day (including the barriers on the harbour blocking access to some of the seating!).

I've been up to the Sydney Tower Eye (not as impressive a view as it could be with all the other high rise buildings in the way) and toured both chambers of Parliament House.

Using the extensive public transport system I visited Centennial Park, Manly and Kamay Botany Bay National Park (which was almost deserted at the time).

I spent a day at Taronga Zoo then stayed for the Vivid Sydney event Lights For The Wild.

Despite being over 10,000 miles away I was still able to watch the latest episodes of Doctor Who on the TV in my hotel.

On the last day I took a tour of the Blue Mountains which I recommend for the amazing views.

There was a wide variety of restaurants available in the evening such that I didn't eat the same meal twice. For breakfast however I had a pistachio and chocolate roulade almost every day from a nearby French patisserie.

I took a few hundred photos and some videos.

House Power Meter

I've recently installed an 80A Power Meter on the electricity supply to my house. It measures the current active, reactive and apparent power as well as providing a count of the total active and reactive energy. These reading are updated every second.

After installing a 100A isolator and pulling through extra cables, the installation of the power meter was relatively straight forward. It's in an enclosure with an 80A circuit breaker, located inside to avoid inconvenience if it ever trips and because the distribution board doesn't have enough space for it.

[Closed metal enclosure with electricity supply input/output cables and RS485 cable] [Metal enclosure with lid open showing 80A and 6A circuit breakers and the Power Meter] [Metal enclosure with the cover off showing the circuit breakers and Power Meter] [Electricity distribution board with the live supply out of the 100A isolator going via the Power Meter]

I intend to write an Android app for a real-time view but for now I'm just collecting historical data:

Bar chart of total active energy usage for each day of the month with detailed views of active/reactive power usage and supply voltage

Find recent content on the main index or look in the archives to find all content.

Content authored by myself is just my honest opinion.

  • Linux
  • Get Firefox!
  • Get Thunderbird!