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PCB Net Ties and Grounding in Kicad
Just a quick post this week. I've finally gotten around to doing the PCB for my power supply and I thought I'd talk about grounding. I'm not claiming to be an expert, I'm just trying to follow best...
View ArticleThe Effect Of Heavy Rain On RDS Message Reception
In a recent post I demonstrated how to log RDS messages from FM radio stations. As a follow up, I thought I'd share an interesting result I observed while logging data over a two week period. I set...
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Losslessly Compressing Similar Images
In a recent post, I created an animation from a series of PNG images that were programmatically generated. Usually after a project like this I back up all the related data for archiving, but this time...
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Simple Data Backup with Paper Based QR Codes
Let's say you have some important data you want to protect, how do you do it? The obvious answer is encryption, this then leaves you with the smaller but more manageable problem of protecting the key....
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Cheap and Easy DIY TV Stand
Recently my mother asked me to sort out a problem she was having. On top of a cupboard in the kitchen she has a 26 inch LCD TV she likes to watch. It's at a height of about 2.5 meters, and when...
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An Analysis of the Triple M Brisbane Playlist
When listening to radio in the car I do exactly what I would at home, channel surf. Generally I listen to Triple J but also switch between Triple M, 4ZZZ, and 612 ABC for something different. For a...
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Large LED Panel Light Testing
I've recently wanted to do more videos and take better pictures for the blog, but I've been limited by my lighting. At the moment most of my photography is done under 2 LED tube lights that illuminate...
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Raspberry Pi USB Webcam Testing
This post will unfortunately be very short. I was playing around with a webcam connected to a Raspberry Pi, and just as I was starting to make headway I got sick. I was using a Logitech C525 to take...
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Controlling a USB Relay with a Raspberry Pi
I love the Raspberry Pi. It allows me to prototype ideas quickly and without too much effort, but one thing I despise is the GPIO. Maybe despise is too harsh, but it's a clunky way to interface...
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8MP Aliexpress ELP Webcam
I've recently been thinking about using the Raspberry Pi for image processing and wanted to use a Logitech C525 web cam that I'd bought earlier in the year. It quickly became apparent that its...
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USB Cable Resistance
Just a quick post today. I've been having trouble getting a Raspberry Pi with an attached webcam to take still images reliably. I think it's a driver issue, but to make sure it wasn't a power problem...
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RF LED Dimmer Teardown
I was recently contacted by someone that had read my post about MeanWell LED driver units with dimming capabilities. They needed advice on how to connect a driver unit to a wireless dimming controller...
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LED Array Test PCB
A quick post today. I was discussing the idea of an illuminated display recently and was unsure of how bright LEDs would appear when driven with different currents. After looking around, I found some...
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A Basic Discrete Event Simulation
Let me paint a picture. You run a service station (or gas station for our American friends), and you sell bread. It's a 24 hour business with a uniform flow of customers throughout the week and you...
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Breadboard Killer Review
I recently did a post about a small PCB to test out some surface mount LEDs. Apart from the main objective of seeing how bright LEDs appears under certain lighting conditions, there were several other...
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Generating 2 Level Harmonic Elimination PWM with Python
A couple years ago I wrote some code to generate Harmonic Elimination PWM (HEPWM) waveforms in octave, which is kind of like Matlab. Recently someone asked if I could rewrite it in Python so it'd be...
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Process an MBOX file with python
Getting snowed under with email? Before you go and clear it all out, have a read of this because it may prevent the same thing happening in the future.I'm on holidays, and one of the first things on...
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Using a Solder Paste Stencil for a Prototype
If you've seen any of my previous post you'll know I'm in the process of making a PCB that contains a configurable LED Grid. Why? Something to do I guess. Anyway I finally got around to assembling...
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Monte Carlo Simulation and Discrete Event Simulation
I've been doing some more work on my discrete event simulator, or to be more accurate, the supporting functions that help to analyse the results. In my previous post I described a basic stock...
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Adding a Sales Profile to a Discrete Event Simulation
If you've been following along, you'll know I've been putting together a discrete event simulator for inventory management. The goal is to better integrate knowledge of sales history, stock levels,...
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