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pretty lat/long

3.3v regulator for Teensy++

Open for embedded notes and see original size for clarity.

This is how you modify the Teensy++ ver 1.0 microcontroller board so that it can be switched with a jumper between 5v and 3.3v. This uses the same regulator that the Teensy uses. Paul has explained that version 2 of the Teensy++ will have a spot to install the regulator. If you want to modify your 1.0, this i how. www.pjrc.com/teensy/

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Uploaded on Dec 2, 2009

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hvx200 mainboard stack

Taking apart my Panasonic HVX200 HD camera for the betterment of mankind... or the small group of independent film makers that might benefit from the research: deadhacker.com/2009/07/26/targeting-the-panasonic-hvx200-...

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Uploaded on Nov 8, 2009

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a ftw moment

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Uploaded on Nov 8, 2009

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voltage division

See hover notes. This is just a simple example of how to divide voltage levels using two resistors.

References:
en.wikipedia.org/wiki/Voltage_divider
www.beyondttl.com/calculator-vdiv.php/ (calculator)

Take note of current draw issues when choosing small or larger resistors:

"You typically build voltage dividers with larger resistors so that you don't draw too much current." ... "Adding a voltage divider to a battery changes the series resistance from a few ohms to several kilohms (R1 || R2). This means that the voltage will quickly drop to near zero whenever you draw a non-negligible current from the divider tap. You could use smaller resistors so that the voltage drop is smaller, but then your divider will be taking a battery voltage to ground through a small resistance, and your battery will be depleted even faster."

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Uploaded on Nov 6, 2009

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goodfet11 debugging

travis clarified that from the bugs I was getting it was likely that pin33 was shorted. sure enough the solder was not creating a strong connection (my fault). hence the clamp

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Uploaded on Sep 13, 2009

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