Raspberry Pi GPIO Joystick | Chris Swan's Weblog After getting MAME going on my Raspberry Pi so that I could play old arcade games. I wanted to hook up a proper joystick. Back in the 80′s I had the excellent and ubiquitous Competition Pro 5000. As mine (foolishly) got sold with my Amiga stuff I got one on eBay, and it came in the original box: The first step was to get it hooked up to the RPi general purpose input output (GPIO). Since I was originally planning to use gpio-keys I used the joystick pinout to hook up to the RPi thus: Up -> 11 (GPIO 17)Down -> 13 (GPIO 22)Left -> 15 (GPIO 23)Right -> 16 (GPIO 24)n/cFire -> 7 (GPIO 4)n/cGNDn/c Blind alley Having already seen gpio-keys I thought I’d be using that, but when it came to the crunch I didn’t know where to start – I probably need a package of RPi kernel source. After some digging around the Raspberry Pi Forums I found a comment about using Python to generate keystrokes. Smelling victory I knocked together some code that turns GPIO into keypresses. The right(ish) approach Conclusion
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RPi SD cards SD cards The SD card is a key part of the Raspberry Pi; it provides the initial storage for the Operating System and files. Storage can be extended through many types of USB connected peripherals. When the Raspberry Pi is 'switched on', i.e. connected to a power supply, a special piece of code called the bootloader is executed, which reads more special code from the SD card that is used to start up the Raspberry Pi. If there is no SD card inserted, it will not start. Do NOT push in or pull out an SD card while the Raspberry Pi is connected to the power, as this is likely to corrupt the SD card data (you might get away with it, but it is best not to). The SD card must be formatted, or written to, in a special way that means the Raspberry Pi can read the data it needs to start properly. One advantage to using an SD card like this is that you can have several SD cards, each with a different operating system, or a different purpose. Which SD card? SD cards come in a range of storage sizes.
7 Creative Ideas for Custom Die Cutting You could take a bunch of ordinary business cards, run your thumb across the stack, and never be able to tell the difference between any of them. Meanwhile, a business card that uses custom die cutting is unmistakable in both look and feel; you can’t help but notice it. The captivating effect of custom die cuts doesn’t end with business cards — it applies to folders, brochures, postcards and any other bit of print media a designer might need to create for a client. Source: mbradyclark.com Source: zychowicz.com To get you comfortable with thinking outside of the box, here are just a few of the many ways you can use custom die cutting to create an unforgettable design. 1. Die cutting acts like a target for your audience’s eyeballs. And nothing is more deserving of the audience’s attention than your company’s logo. Source: cardview.net Die cutting to emphasize a logo helps to show its unique shape and bring it forward so that the audience immediately recognizes it. Source: behance.net 2. 3. 4. 5.
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