Author Archives: Heath

Spectrum Analyzer

I’ve started work on a spectrum analyzer built around the MSGEQ7. A spectrum analyzer measures the magnitude of an input signal versus frequency. – Wikipedia In this case the MSGEQ7 will be measuring an audio signal, cutting it up into 7 frequency bands (lows/mids/highs/etc.). The data will be read by an arduino and displayed on a series…

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Hacking a Swing

The newest member of my family has become quite attached to swinging. The problem was that the swing was battery powered. I was reasonably surprised at how long the batteries lasted–nearly a month of every day use. Still, when they finally expired, I was reluctant to make another purchase. So instead, I embarked on a project…

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HDR with chdk and Ubuntu

I recently purchased a Canon PowerShot sx40 hs. It didn’t take me long to install chdk, an alternative firmware available on Canon’s PowerShot line. One of the features I was most interested in was bracketing. Bracketing is the technique of taking a number of pictures of the same subject with different settings. Once you have a number of…

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PXE Booting Ubuntu from an iSCSI drive

The Plan This will serve as a guide to booting Ubuntu (XBMCbuntu in my case) from an iSCSI drive. The Result The boot process for my XBMCbuntu machine follows these steps: The BIOS is configured to PXE boot. The PXE boot process launches iPXE (formerly gPXE). iPXE connects to the iSCSI drive and launches GRUB which is installed…

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Office Lights

How many projects is it okay to start without finishing at least one? It seems I’m determined to find out. I’m currently in the process of finishing a room in my basement which will become my new office/hackerspace. Naturally, I incorporated copious amounts of LEDs into the design. I picked up a couple of reels…

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