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Electronics

Let the sun run your pump

I suppose all waterfalls are solar- powered – the sunshine evaporates the water which turns into clouds, becoming rain which pours down into waterfalls. So the publisher’s challenge to make a small solar- powered pump for Greg’s sculpture seemed not too difficult. 

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The Shed Issue 79, July/August 2018

In The Shed Issue 79, July/August 2018, we head to Wellington to document Shea Stackhouse making a small knife from Damascus steel, fondly known as a Puukka (that’s Finnish for small knife). While we are there we hang around to meet some knife fans who receive knife making advice from Shea at one of his regular knifemaking classes.

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Arduino 101: Part 4

In the last issue we presented a project to create a temperature regulator. In this issue we will show you how to include an LCD that displays the highest and lowest temperatures, along with the current temperature. In the sketch I have also included a section that scrolls text, as a demonstration.

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Arduino 101 Part 3

In this article, we show how an arduino microprocessor is complex enough to exercise variable control, not just the expected computer approach which is that something is working, or it is not. Digital devices have only two states: on or off. An analogue device on the other hand can have a near infinite range of states. 

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Arduino 101: Part 2

So far we have begun to get acquainted with the Arduino and IDE, the “sketches” or programs that make it work, and we have got it working blinking an LED on and off. In this article we will delve a little deeper preparatory to diving right in with a fully edged project with some real- world applications in the next issue.

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Arduino 101: Getting Started

This is the first in a series of articles to introduce the versatile and extraordinary Arduino system to people with no prior knowledge of programming or electronics. We will take you step-by-step through how to set up, program and use the Arduino and provide a series of projects that will help you gain the knowledge you need to free your imagination and work with this revolutionary device.

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Simple Solution

Hydroponics is all about growing without soil. In many ways this simplifies the lot of the gardener, but it gives them added responsibility for providing plants with the right level of nutrients. As water with nutrients tastes, feels and looks much the same as plain water, a testing instrument called an “EC meter” or “CF meter” is used.

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Three – Phase Grunt

When a friend at Metpresco Engineering offered Jason Clarke an old, universal tool and cutter grinder for his garage workshop, Jason had to think about how he could power it. 

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High-fliers in Waikato

Don’t try this at home. In the town of Niagara Falls, you are heading along a street. You suddenly overfly a car, then a bicycle travelling along a path near the water. In an instant you are over the lip of Niagara Falls. In a scary moment you find yourself looming over the precipice and then zooming away across the face of the thundering water.

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Model Engine Sparkplugs

When I left school I took on an apprenticeship at William Cable in Wellington. Unknown to me at the time, this opportunity would lead to a life-long interest in model engineering. My apprenticeship gave me a wonderful grounding in all aspects of engineering.

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Installing an automatic gate

When Karl Bishop had finished fixing and painting the fence on his newly acquired house he knew he needed to finish it with a gate. A gate would allow the dog to roam safely and it would add an element of security.

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