A while back, my friend, Professor McSwivells purchased an Adafruit Grand Central M4. Unfortunately it was dead on arrival, and after being in touch with the staff at Adafruit, they reluctantly refunded the purchase. The dead board went into a drawer and was forgotten.
The professor recently found it again and thought he'd send it down to me on the off chance that it could be repaired or at least parts salvaged and recycled.
Two weeks before the International Repair Day 2021, our 26 year old dishwasher from 1995 packed it in. It came with the house, and was pretty old back then. We never used it all that much over the years. But recently it has been used more, and I guess the old girl couldn't cope.
I know nothing about dishwashers (or even how to operate one), so I had really no idea where to begin.
I'll walk through what I did to repair it
Hopefully this article will serve as a good reminder for when you need to stretch your legs again.
My favourite friends of React are: React-Redux, React-Router, Redux-Thunk and Hooks.
For this refresher, I'm going to present a simple, but reasonably complete application.
One of the nice things about SQLite databases is that they are so quick to spin up and work with. That's opposed to the overhead of something like SQL Server and it's installation.
Also, EF is getting better and easier all the time.
And being able to do all this with .NET Core in a light and flexible IDE like VSCode makes the experience much more pleasant.
Let's get to it.
The AirFlash is an open-source standalone USB powered device that accepts up to four USB Flash drives and will serve their content out over WIFI to one or more users.
You can take it anywhere and plug it in to a USB power source. Within 90 seconds the device will be available.
You can build your own.
My original TEAC FD-235F 4161-U floppy drive died maybe a year before I stopped using the Amiga 1200. I had to replace it with another drive that was too tall, meaning the case could never be properly closed.
I was never able to fix the original drive. 25 years on, I still have this non-working drive and decided to take a crack at a repair.
I've been looking forward to getting this on the bench for a while now. A friend gave this to me a while back when he sold off his Amiga 1000. I didn't know what state it was in. Like most Commodore monitors, these are worth fixing, with composite in, TTL RGB and SCART inputs.
On the bench this time is a Panasonic Home Theatre System, the SA-PT170, or sometimes labelled as an SC-PT170.
This unit was working for a good solid ten years but would no longer turn on.
Generating a VGA signal can be a rewarding achievement as an FPGA project. There are loads of explanations and illustrations online on how to generate VGA signals. But sometimes the concept is not clear.
I'll attempt to try and make it much clearer and get you on your way quicker.
I love it for sketching out quick ideas and experiments.
This article aims to take you through a more recent version of
nextpnr, and the Icestorm tools on Windows specifically.
There will also be tips along the way and some troubleshooting at the end for when you don't always get the happy path.
Once I got it into the workshop, I attempted a power on and got a pop as well.
This one was a fun journey.
Saw the ad for the Raspberry Pi Pico from Core Electronics the other week. At $5.75 each, I couldn't pass it up.
I ordered a couple and they arrived pretty quick in their cool little production cases. I soldered one up and then checked the set up page to see what was required to get it running.
Learning to use vectors in c++ is fairly straight forward. But passing the collection to a function and returning an instance is not demonstrated as often.
The following code snippet should show a nice complete flow in one shot. Take a look:
I plugged the unit in and switched it on. Pressing the power button only showed
F09 on the display.
Thought I'd open it up and take a look around.
This article will help you get the most commonly desired URL format working.
ESP32 is pretty straight forward when it comes to serial debugging with the console via the USB connection.
However when trying the Amica NodeMCU ESP8266, serial was not a straight forward process via the Arduino IDE.
There's a lot of articles out there already on using these little 128×64 oLED monochrome displays with an ESP32 or with an Arduino board.
The go-to library for working with oLED displays appears to be Adafruit's SSD1306 library judging by the amount of articles written on it. This one is packed with features while being easy to use (but there are others!).
The ESP32 has a stack of GPIO pins allowing you to attach a whole bunch of LEDs. But it's a neat practice to try using fewer pins with several LEDs using Charlieplexing. There's quite a few things you can learn along the way.
This guide will show you how to quickly set up an ESP32, placement onto a breadboard, wiring, the software, and finally sending code to it.
In February, myself and a couple of mates from work stayed at the Space Capsule Hotel in Sydney. Some thought what we were doing was dreadful/unconventional but we were keen to check it out nonetheless.
Once inside, there really is an illusion of being inside the sleeping cabin of some ship on route to mars.
I discovered a most excellent thing recently for developing websites: Hugo. More truthfully, a friend got me onto it. At first I couldn't see the point of something that generates static pages from source.
Oscillators on a PIC can be a bit of a minefield to understand. Especially learning to read through a datasheet. So it can be a little daunting just to get a baseline start.
Hopefully I can help here.
If you need a quick setup for the PIC16F1455, fast wiring and code to check output from a pin, this article is for you.
One of the nice things about working with FPGAs and Verilog is the array of open source tools and development boards that are available.
Our aim is to take a verilog file, a testbench and simulate it using Icarus Verilog / GTKWave.
Microsoft has a sea of settings that have their best interests at heart. The biggest one being Cortana, and placing ads on the lock screen.
When receiving a new laptop or PC that has Windows 10 installed, there are a number of things that you can do to shut Microsoft out.
I recently needed to create a new LaTeX macro for a User manual. The macro was to output a defined character, but in a colour specified by the author. Therefore, I needed a macro that accepted a single optional argument.
I am really excited by this technology. In many aspects, it's a return to where I started, assembly coding on 8-bit and 16-bit machines. And it's a shot in the arm for the browser, opening up many new possibilities for frontend web development.
My first experiments with PIC Microcontrollers was on the PIC32MX170F256B. But after discovering that there was no USB module on that controller, I then purchased a PIC32MX270F256B which did have one.
This article serves as a reminder for the minimum setup for this microcontroller.
I blamed it on the fact I had accidentally purchased an SSD1315 instead of an SSD1306.
I first heard about the Pi1541 created by Steve White on Chicken Lips Radio. There had been other solutions in the past for hooking up an SD card to a C64/128 but nothing for the average hacker that would fully emulate a 1541 or daily chain to another real 1541.
Discovering that this project ran bare metal on the Raspberry Pi without any underlying OS was impressive to say the least, exactly what I was hoping someone would eventually produce.
I figured I could build this on perf board easily enough.