At the same time as sorting out Passwordless Sudo on my Ubuntu virtual machine, I am trying to make it match my fairly default Raspberry Pi or other Linux box setup. My default username on a Raspberry Pi is still ‘pi’, not for any real reason other than nostalgia. And […]
Blog Posts
166 posts
At home, I have a Raspberry Pi that I use to develop my ROV and K-9 software. Raspbian seems to have passwordless sudo, meaning you don’t have to enter the user’s password to run a command as root. I share this development machine with my wife, Tamarisk. In the interest […]
Since quite a lot of traffic to this site is related to the meaning of automotive terminal designators, What is KLR, KL15, KL50, KL30, and KL31? and More about KL15, KL30, KL31, KL61, etc, it is probably worth my listing all the pins in the DIN 72552 standard. DIN stands […]
As part of my K9 and ROV projects, I am using at least one Arduino to control components such as the K9’s ears. Since the Arduinos will be fixed to the robots, I will program them via the Raspberry Pi. The version of Raspbian I am running is Raspberry Pi […]
When writing reports and other technical documents, you tend to need to use special symbols. Such as μ when referring to capacitors, or Ω for resistors. Most of these specialised characters and symbols are not available on a standard phone or computer keyboard. Usually, if they are available behind a […]
Farads (F) is the standard unit of capacitance in the International System of Units (SI). One farad is a massive unit of capacitance, representing the ability of a capacitor to store one coulomb of electrical charge with a potential difference of one volt between its plates. Given the enormous range […]
Ian Hughes’ 3D-printed files for K9 also include files to create internal components that fit under the side featuring the ‘K·9’ logo. (Yes, I have used an Interpunct.) The design features two panels held in place with 10 mm diameter magnets. Unfortunately, Ian does not include any colour information in […]
Bob Clough managed to get our Prusa 3D printer working again, so I am back to printing out parts of my K9. One of the parts is the K9 button panel, which is mounted on K9’s rear. Looking at the images I have assembled of K9’s timeline, I have the […]
In my previous posts, I got the dimensions for ISO 4017 Machine Screws and DIN 931 Bolts. In Autodesk Fusion 360 I have drawn the ISO 4017 screws, along with ISO 5032 hex nuts, ISO 7091 washers, and ISO 4762 Socket screws. I have not done the DIN 931 bolts, […]
ISO 4017 specifies the form of metric-sized hex head screws, and covers thread diameters from M1.6 up to and including M160.
When doing anything more mechanical with 3d Printing, you will want to use bolts and other fixings; This is where DIN 931 comes in!
I don’t like programming, I am not very good at it; yes I can do just enough to make Arduino’s talk SCPI and do other things for me. However, I dislike writing reports in Microsoft Word more (don’t get me started on my feelings about Microsoft Windows). This is where […]