The Shed - Projects

Size matters

21 September 2023

Back in the carefree/careless days we took a drive up to the Hokianga harbour, mainly for a fish and chip meal at the legendary Omapere pub, and promptly fell in love with the place. It’s New Zealand 50 years ago: clean, uncluttered with houses and people and just plain beautiful on any given day.
The harbour simply sparkles on a sunny day and the dunes on the north head are nothing short of spectacular. The views coming over the ridge from Waimamaku and the Waipoua forest are breath-taking. We still stop and try to take it all in.
Everything moves at a leisurely pace up at the “Hoki”. It is still a hidden gem, but not for long I feel. We have a few celebs up there now and there are more and more serious homes going up, but it still has that laid back feel to it. Opo the dolphin is the only thing that has happened to the area and that was 60 years ago.

Make yourself a decent chef’s knife

23 August 2023

Coromandel knife-maker Lloyd Franklin forges his knives from the raw material of coil spring steel rather than cutting or grinding the blades from existing metal shapes. His high-quality knives are sought after by chefs nationwide and by those who appreciate a well-balanced hand-made tool.
Coil spring steel is easily confused with spring steel that we know from a car leaf spring, says Lloyd Franklin. But, he explains, coil spring steel is a high-tech, shock-resisting tool steel from which you can happily make stone-working tools, woodworking chisels or even knives.

The perfect desk job

17 August 2023

The desk that is the subject of this article was made for one of my grandsons and is made in a similar style to a bed I made for him several years ago (see the article in The Shed, issue 43, June/July 2012). Like the bed it is made out of beech and finished with Danish oil.
While I have been able to undertake almost all of the processes in my hobby- styled workshop, I want to stress that this desk could be made at home with just a few hand tools. For example, you could ask the timber yard to dress the timber for you; all cutting could be done with a handsaw or a coping saw for the curves; the mortises and tenons could all be done by hand. The process would take longer but you would certainly enhance your skills.
The design process is always interesting for me and, with some initial design concepts in my head, I sit at the drawing board and draw out to scale two or three 2D versions of what I think the final product will look like.

Firewood sawhorse

19 July 2023

I created this little project because I needed to cut firewood easily without someone to assist in holding the wood. Although not my own invention, it is an interpretation of pictures gleaned from the web and adapted to materials that you can buy easily in New Zealand timber yards. The whole project cost me $25 and took about an hour and a half to make. In anybody’s book that is value for money and time well spent.
It is essentially four crosses of timber braced to form a cradle for cutting your firewood.

Chips and dip, anyone?

22 June 2023

I have used a piece of swamp kauri from Kaitaia for this project. The wood may well be 45,000 years old although pieces of swamp kauri have been carbon dated from 1000 to 50-60,000 years old from different parts of northern New Zealand. The time-scale of this wood is mind-boggling. How do we get this wood? You keep your ear to ground for news about logs and stumps that emerge, then we have to get off our backsides and do something about it. Swamp kauri, and occasionally other timber dug from old swamps have not rotted because they are preserved in anaerobic conditions. Kauri is the most common “swamp” wood because it is the slowest wood to deteriorate when above the ground before the land area became swamp.
For woodturners, kauri is a soft wood. Puriri, pohutukawa, black maire are hard woods, although botanists use the terms “hardwood” and “softwood” in a way that is related to the type of tree and not the hardness of the wood.

Build a hydro power plant

15 June 2023

Ever thought of creating your own electricity? It’s a challenge a number of New Zealanders aspire to these days, as rising power prices and possible insecurity of supply bring out the Kiwi leanings towards independence and DIY.
And how to do it? A small stream, a broken washing machine, a shed and you’re away. Well almost.

Raising the bar

31 May 2023

I have wanted to make an elevating bar stool for some time. They are a relatively simple design – four legs attached to a nut through which an acme thread runs, raising and lowering the seat.
However, attaching the legs to the nut is problematic. The nut is usually a fairly large piece of steel, in this case it’s 38mm diameter, and even with the hole and threads cut it still has a wall thickness of nearly 10mm. The legs on the other hand have a wall thickness of only 2mm. That size differential makes using MIG welding difficult. It can be done of course but it isn’t quite as straightforward as usual.
I felt it was ideally suited to TIG welding and as I hadn’t tried TIG before I thought this might be a good opportunity to get some experience.

Warning: boiling point!

25 May 2023

I own an American classic car and it comes with the usual 1960s instrumentation—speedo, fuel gauge but only warning lights for oil, alternator, and water temperature. The alternator light comes on when you turn on the ignition, but the water temperature light is designed to come on only when the water temperature reaches 120-125 °C which is usually too late.
To fix that, I have devised this program powered by an Arduino micro-controller that will operate the temperature light when the engine powers up and light it up again to warn the driver as the temperature approaches 100 °C. It uses a readily available sender that will fit most vehicles.

Arduino software for wipers and temp gauge projects

25 May 2023

Controller
I chose to use a shield (add-on board) to house all the parts for this project that allows the use of any standard Arduino and settled on a Seeeduino V3.0 and a Freetronics prototype shield as an inexpensive solution.
I used the controller and shield to for the previous variable wiper speed project for the car (“Wipe that classic windscreen,” Shed, Apr/May 2012). This second part uses the same controller and shield to do both tasks. The reader can either make one or both. The shield construction includes the extra parts (two resistors, one transistor, and one diode) and uses the “Start” button to do the “Normal” calibration.
Here are the two sketches (software) in these The Shed website’s two posts.

one combining water temperature light and variable wiper functions into one controller; and
one that just does the water temperature light.

Wipe, wipe that classic windscreen

19 May 2023

I own an American classic car and there are a few mod cons that are missing. I’ve added central locking because crawling over seats was a pain, but I thought the Arduino could add a few features that aren’t available in the shops. This is the first of two parts which uses the same piece of Arduino hardware to do two different tasks—run variable-speed wipers and a temperature gauge. Each can be used on their own as it makes no difference to the software

Out of the box

3 May 2023

The modern incarnation of the chest is the blanket box which sometimes doubles as a seat so it needs to be strong enough to support weight as well. This project is no more than a box with a lid and base. Dowels are the primary jointing method throughout and the top and base use a floating panel within a frame. There is also a small sliding drawer which is also dowelled together.

Top gears

1 April 2023

Contrary to what the poets say, its gears, not love, that make the world go round. The magic of an exquisitely constructed timepiece with its myriad whirring cogs is an eternal delight. Horology has always fascinated me, and it has long been an ambition of mine to build the mother of all clocks, an orrery. Named for the 4th Earl of Orrery who commissioned George Graham to make the first modern device in 1704, they mark not just the passing of the hours, but the exact movements of the planets as they beat out Kepler’s laws.

Rescue those versatile stepper motors

10 March 2023

Magnetism is wonderful stuff.
As a way of moving things it has no peer. It has no friction, excessive heat or other unwanted effects, and is easily harnessed in the shed in the guise of stepper motors. These versatile devices have an astonishing range of rotational speeds, from zero to tens of thousands of rpm.
Thanks to the precision of digital control, they can accelerate, decelerate, turn a specific number of times or even minute fractions of a single rotation – all repeatedly and reliably.

This offroader project is a beaut

23 February 2023

Over the last couple of years, my son Kurt and I have built a few basic go-karts which not only gave him a taste of very basic engineering, but also allowed us to pile up valuable hours of quality time working together in the shed. This new project had a bit of a twist to it as, this time, my son was the chief designer and engineer and I was relegated to labourer. Like all the previous projects, he let me fund it.

Gold fish

28 January 2023

The shubunkin goldfish is sometimes referred to as “poor man’s koi” and in China the koi carp is often used to represent yin yang. I have drawn the body of the shubunkin goldfish fish to look like one half of the yin yang symbol (see panel). I then added the fins to suggest and give movement to the piece.
Firstly I took a photocopy of my artwork and stuck it to a sheet of 0.5 mm copper plate with double-sided tape. This is to create templates of the body and fins

Projects