Apr 29

Shoehorn a accelerometer heading calculation into an ATTiny 261

working on a recent project, I wanted to get an ATTiny261 to calculate a heading in degrees from an accelerometer. The accelerometer (an Xtrinsic MMA8453Q 3-Axis, 10-bit/8-bit Digital Accelerometer) has an I2C interface with digital X/Y/Z readings, so no analog to digital mess, just simple math, right? RIGHT…. Given all the UAV stuff out there, …

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Sep 18

WP e-Commerce, what a mess

boy, thought I’d move forward by using WP e-Commerce to build my shopping cart interface. Man, the shipping is a mess. first the recent USPS update broke the USPS shipping calculation. I got that fixed myself (no help from the WP e-Commerce guys). Now something wacky with the interaction between PayPal and the Shipping address. …

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Jul 07

New Web Site!

took some time, but migrated from a relatively heavily customized WordPress site to an almost out of the box WordPress site. Did that so I could get a shopping cart plug-in that would actually calculate shipping based on destination rather than being stuck with one shipping charge that had to apply across the board. Let’s …

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Feb 21

Samsung Infuse battery life

Got a Samsung Infuse when they first came out. So yeah, mine is now ‘old’. All of a sudden about a month ago, battery life went into the dumper. Charge to 100% before going to bed, then in the morning less than 50% remaining. Also noted that the Samsung Infuse case seemed warmer than expected. …

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Sep 30

Foray into China resourcing

As you likely surmise the most expensive component of the Cat Faucet is the solenoid valve. So as my supply is getting low, started looking at other, less expensive resources. All these valves are really just made in China and imported, so I figured why not go straight to the source. Found a web site …

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Aug 06

More motherboard issues

Looks like I’ve got another board with capacitor problems. This one I’ve caught before the ultimate failure. Here’s a shot overlayed with the temperatures of the various capacitors I took with an IR sensor. Note that the right most two caps are already showing a distended top and they’re also the hottest. Can you imagine …

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Jun 04

Magellan Roadmate USB plug

ok, so accidentally ripped off the USB plug from the USB cable on a Magellan Roadmate GPS. Figured I’d just stick on another Mini-B cut off another cable, connect the + and – (pin 1 and 4) and be done. No go, the GPS thinks that it’s plugged into a PC and won’t navigate. Some …

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Jan 20

What another new project?

Ok, this one was in the works for some time. Now called USB-GPIO (General Purpose IO). Adding simple digital IO capability back to a PC when there is no more parallel port to use. check it out here

Nov 14

Making rectangular holes

not really a project, but a tutorial on how I make rectangular holes for the sensor box on the cat faucet

Nov 06

Finally a new project

Quick and dirty interval timer for Nikon. It’s about as dirt cheap as they come, but it works. check out the video at the end of the project page for a sample time-lapse movie