Subsequently to the Serial interface issues, I bought an Adeept Robot HAT from Amazon. I have been keeping an eye on it for a while. The schematics and example code for the Robot Hat are available to download, which means that I can work on utilising the designs in my […]
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The Arduino Compatible Pro Micro and the Arduino Leonardo both use the ATmega32u4, which has built-in USB communications. While this eliminates the need for a secondary processor or UART chip, it allows the Leonardo to appear to a connected computer as a USB device, such as a mouse or keyboard, […]
To more accurately measure emissions from a DUT (Device Under Test), it is wise to calculate the path loss, or cable loss, from the receiving device, whether that is a LISN, a Current Clamp, or an antenna. We can do this by using the tracking generator on the EMI receiver […]
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 […]
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, […]