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Hacking the Sureflap Dual Scan Cat Flap

- July 24, 2018

Hacking the Sureflap Dual Scan Cat Flap To get the RFID codes for the 134.2 KHz Cat chip ID's Aha! A PIC. And an ICD port next to it. PICKit3 at the ready. I'd quite like to get the firmware off this if possible.

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Handling and Tyre wear patterns

- January 31, 2013

Racing last night at Bashley the car was still quite unstable. For the last few races I have been changing one setting at a time to pin down which are making improvements. So far I've stiffened the front springs, moved the shock positions on the rear and toed out the steering a little. The car was better but still quite hard to tame the back end.. If you look closely at the tyres you can just about make out that the insides of the tyres are a little duller meaning that the majority of the cars weight has been on the insides even during dynamic handling. This is a big clue to start looking at the camber adjustments. Camber is the angle of the wheel relative to the track looking from the front of the car. 0 degrees means the wheel is dead vertical. -5 degrees means the top of the wheel is angled toward the centreline of the car. A little negative camber can be useful, but evidently I had too much. I rather unscientifically reduced the amount and in the next heat the car was ...

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Getting FlashFloppy onto the Gotek SFRC922D

- October 12, 2018

These flash floppy emulators from Gotek are great. But they are even better when they have the FlashFloppy firmware loaded. The SFRC922D model I have seems to have some extra holes under the serial/boot jumpers. I chose to use the USB/DFU programming method for which you will need a USB A-A cable. Here's how I put the Gotek into boot mode for DFU: Jumpers for boot/DFU mode. Wirelinks above the white connector. Once in boot mode you can program the device using the dfu-util: I'm using OSX, and used homebrew to install the dfu-util. brew install dfu-util dfu-util --list dfu-util 0.9 Copyright 2005-2009 Weston Schmidt, Harald Welte and OpenMoko Inc. Copyright 2010-2016 Tormod Volden and Stefan Schmidt This program is Free Software and has ABSOLUTELY NO WARRANTY Please report bugs to http://sourceforge.net/p/dfu-util/tickets/ Deducing device DFU version from functional descriptor length Found Runtime: [05ac:8206] ver=1965, devnum=2, cfg=1, intf=2, ...

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Python Dependency Injection

- March 02, 2023

Python: importing settings or dependency injection Two common approaches to configuring a python application are importing settings and dependency injection. Importing settings involves creating a settings module or file that contains all the values and configurations needed for your application to run. These settings can then be imported into other modules and used directly. The advantage of this approach is that it is simple and easy to understand, and can work for small projects. The disadvantage is that it increases coupling to the settings module and to the way that those settings are collected. It also makes it harder to unit test a module or class without having to resort to mocking the settings module in some way. Dependency injection involves passing dependencies (such as settings) into a class as parameters, typically using a class method that sets some class variables. The advantage of this is that the class needs no knowledge of the settings module or ho...

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Tatung Einstein

- July 15, 2018

Had a great time at the Newbury Radio Rally and an amazing bit of luck finding this Tatung Einstein from 1984 in pretty good condition. In another bit of amazing luck one of my friends had a bundle of Manuals, magazines and some disks.

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