The 2019 Christmas Card
Ho ho ho! Is that time of the year again, and we have made a new Christmas Card. As you might see, the Card is rather influenced by our services and what we have made previous years. Electronics The Schematic are…
Posts by Ragnar Ranøyen Homb
How to go from an irregular form to a technical illustration
A common challenge is how you can go from a free hand drawing to a more technical correct illustration. In this blog post we are going to show you a process you can use to go from a simple hand…
Measuring Frequency With a Digital Multimeter
We have written about using regular Digital Multimeters (DMMs) to measurements common things such as Voltage, Current, Resistance and much more. Those post can be checked out here or here! But in this post we will look deeper into an…
Arduino as a Stepper Motor Controller – Jogging with acceleration
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As we have written about earlier: Jogging a stepper motor with an encoder can easily be accomplished with an Arduino. In this post will we show how a simple “stepper motor jogging-system” can be enhanced with acceleration and de-acceleration. Introduction…
Using a simple Arduino to measure capacitor value
As you probably read in this post, capacitance is a measure of the ability to store energy. They are among other things used in rectifiers, as bypass devices and in analog filter circuits. They are super-important components and critical for…
LED Matrix with Rolling Particles – Technical Insights and Finishing Touches
In our latest blog post we wrote about the enclosure on this “LED Matrix with Rolling Particles”. But how is it to use? And what happens on the inside? Continue to read this post to find out! What Does It…
The 2018 Christmas Card
Last year we made a Christmas card heavily influenced by our fields of expertise and what we deliver. This year was no exception! What’s new this year, among other things, is the different design, and that there exists several variants…
Controlling a Camera Shutter Remotely with an Arduino
To take a picture on the exact moment you want to can be a hassle. But most cameras have the possibility to use an external shutter remote. Connecting a regular button here does not help us, but by creating a…
Remotely Controlled LED Helmets
A few months ago we were approached by NRK (Norwegian Broadcasting Corporation) with a request to create some cool stunts for the annually televised radio show called P3aksjonen. We started brainstorming around several ideas together with NRK. With a short…
How to Load and Save Configurations on an Arduino
We have earlier written a rather deep post about a non-volatile (not lost when power is) way to store data here, but in this post we will focus on the following question: How can I save and load configuration data…
MQTT – What Is It? And How Can You Use It?
In this post are we going to talk a bit about MQTT and give you a quick example of how you can publish a simple message to a MQTT-Broker from a simple computer system (here: an Orange Pi Zero). MQTT…
Repairing a NAD C370 Amplifier – The Slow Start Protection Module Problem
A very common problem with NAD amplifiers (here: C370) is that it becomes very slow to start after some years (10+). The time between power-on and deactivation of the protection increases to several minutes! And why is this happening? In this…
Building a Large Kossel Delta Printer – pt. 5: A Video from the Building
We have through several posts now followed the making of a rather large Kossel Delta 3D-printer: Pt. 1: Parts and Planning Pt. 2: Building Update Pt. 3: Electronics and Wiring Pt. 4: Modifying the Effector Here is a a “Making of”-video…
Datalogging with a Multimeter
A Digital Multimeter (DMM) is a nice tool which we have talked about several times before (you can find an intro on how to use it here). The main usage is to measure something right now. But how can we…
Behind the scenes: “Blåfrost 2016”
This is a behind the scenes post from something quite technically manageable, and at the same time visually very powerful! The case is an interactive installation that turns on the lights and starts up the internal smoke machine whenever…