When designing boards, one of the things I spend a lot of time checking is if my UART transmit (TX) and receive (RX) lines are the right way round, or switched over. When the design gets to the printed circuit board (PCB) level, it can be nearly impossible to rework. […]
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This looks like a way to allow for addressing nodes on a CAN, RS485 or DMX network without needing to use either DIP switches or PCB changes.
Over on Reddit, there is a post called “Client complaining about our own branding on our own custom products, how do you handle white labelling? [link]”, I assumed that they were building a product from scratch and since they were placing a product on the market, they had done their […]
Unfortunately, companies use Microsoft Word frequently to write reports. Word has basic support for Tables of Contents, Cross-Referencing, and Captions for Images and Tables, which Word refers to as fields. One issue is that Word does not update the fields automatically without requiring user interaction. I use an application called […]
In my previous posts, I have managed to get webcam feeds and Flask serving a webpage. Now I want to use NGINX (pronounced “engine x”) to bring everything together and run it all on port 80 (HTTP). I have moved the ports around for Flask and the cameras to rationalise […]
In my post about getting Flask running as a service, I included a screenshot with a large dark area as the background. In this post, I will work on filling it with an image from a web camera, which will run on the same Raspberry Pi. I will cover the […]
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 […]
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 […]
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 […]