Shiny motorcycle computer

We’re rather surprised at how popular it has become to build your own motorcycle computer. [Mario Mauerer] tipped us off about his shiny motorcycle computer (translated) for his Yamaha XTZ 750. It uses an ATmega644 microcontroller to pull a variety of data together and display it on this white LED backlit display. He connected a flow meter to the fuel line to monitor gas consumption. Oil temperature is captured by inserting a brass tube (containing the sensor) through a hole in the oil cap and soldering it in place. Water temperature is gathered by measuring the external temperature of one of the cooling lines. [Mario] uses a rotary encode with a click function as the control interface device, and a battery backed real time clock keeps time.

A quick look at the PCBs tells the tale of good circuit design. But we do wonder about catching the reflection of the sun in that shiny bezel.

2-bit paper processor teaches how they work

Take a few minutes out of your day, grab your scissors, and learn how a simple processor works. [Saito Yutaka] put together an exercise to teach processor operations with paper. After downloading the PDF you can cut out the Address and Data pointer as well as two-bit data tokens for each. The processor has three instruction sets; Increment register by one, Jump if not over flow, and Halt wait for reset.

Once you’ve got your cutouts you can follow along as the program is executed. The INC operation is run, with the JNO used to loop the program. Once the register has reached an overflow the overflow counter halts the program.

One word of warning, we think there’s a typo in one of the captions.  Once the program starts running and gets to address 01(2) the caption still reads 00(2) for both address and data. As long as you compare the values in the picture along the way you should have no problem getting through execution. which has now been fixed.

Self playing Bayan built nearly 22 years ago

The year is 1988, where a Russian engineer [Vladimir Demin] has combined a Bayan, or button accordion, with several (we lost count at about 96) solenoids. If that alone doesn’t blow your mind the computer, also hand built by [Vladimir], controls the whole process leaving the operator to only work the bellows. Putting truth to the fact in Soviet Russia, accordion plays you. We wish we could find some more information about the instrument, but curse our inability to read Russian. Alas check after the break for a shorter version of the video in the link above.

Related: Electronic accordion doesn’t compare.

[Read more...]

Car computer requires PIN for ignition

[Ben's] added some nice goodies to his Volvo in the form of an in-dash computer. The system monitors two pressure sensors for boost and vacuum, as well as reading RPM, O2, and exhaust directly. All of this is tied into the touch interface running on an eeePC 900A. But our favorite feature is that the system requires you to enter a PIN to start the ignition. The forum post linked above is short on details so we asked [Ben] if he could tell us more. Join us after the break for a demonstration video as well as [Ben's] rundown on the system.

[Read more...]

In-dash motorcycle display

[Muth] added an auxiliary display to his motorcycle instrument panel. He started out prototyping with a PIC 16F877A which he used to access information through the ECM diagnostic connection. Once he had that working he found this tiny display which fits perfectly between the speedometer and tachometer. There’s a short demo after the break where you can see a past-30-minute history of the Adaptive Fuel Value and the engine temperature as well as a secondary information screen.

This is another nice addition to our collection of vehicle displays, scooter controllers, gear indicators, and motorcycle computers.

[Read more...]

Light bulb form-factor computer

This computer can be mounted in any standard light bulb socket. It uses a pico projector combined with a camera to generate a touch display wherever you shine it. The photo above and the video after the break show the bulb in a motorized lamp arm but that’s just smoke and mirrors, the bulb itself is the core concept. We think there’s real potential for home-built versions. We’ve seen touch displays similar to this that mount on the side of a laptop, but why have the computer around at all? Ditch the USB connection for wireless and have it connect to your home server for processing power. It becomes a perfect solution for places that aren’t traditionally computer friendly. For instance, that kitchen computer you don’t want to touch with dough-encrusted hands becomes washable when the display is projected on a cutting board. [Read more...]

Elegant wearable computer

[Jason Statham] [Martin Magnusson] wrote in to tell us about his adventure in building a wearable computer. The device in its current state is a Beagleboard running Angstrom Linux tethered to an iPhone for internet. A bluetooth keyboard allows for input, while output is displayed on monocle-ized Myvu. And last but not least, the entire setup is powered by 4 AA batteries for 3 hours of life.

Its not as small as some of the wearable computers we’ve seen before, but if you wanted to whip out your own it sure takes a lot less soldering.

Follow

Get every new post delivered to your Inbox.

Join 91,297 other followers