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Author Archive for: "admin"
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By Chad Kidder
In embedded C, Embedded Systems
Posted October 29, 2022

Cleaning Out Unwanted Memory Sections for ARM Cortex-M

Sometimes we want to individualize a piece of hardware.  We don’t want to recompile the whole program (because then it’s hard to verify that it is the same program), and we don’t want to [...]

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By Chad Kidder
In Test Equipment
Posted September 25, 2017

Hantek DSO1202S and CSV Files

I recently picked up a Hantek DSO1202S oscilloscope to do some measurements of 120V AC power lines and UPSes.  I got it setup and took some measurements.  When I went to post-process the CSV [...]

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By Chad Kidder
In python
Posted July 12, 2017

Python and XML Validation

While recently working on a project where we had included, nested, embedded, or inherited XSDs, I had errors while getting the XML to validate using LXML.  The solution ended up being that when [...]

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By Chad Kidder
In 8051, Bluetooth Low Energy, embedded C, Embedded Systems, iBeacon
Posted December 9, 2016

Updates on iBeacons with the CC2540

One of this year’s projects was taking a CC2540 and making an interactive iBeacon with it.  This turned out to be more difficult than expected… which may explain recent design trends [...]

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By Chad Kidder
In computers
Posted November 23, 2016

In a Pickle with OpenVPN

This is a story of trying to do the right thing… without reading all the instructions.  I recently was setting up OpenVPN for my home network.  The instructions are pretty strait forward. [...]

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By Chad Kidder
In Altium Designer
Posted August 16, 2016

Altium Design Security Advisory

After troubleshooting a problem I was having with the supplier links in Altium Designer, I recently found that, for at least one of the supplier links (Mouser), your login credentials are being [...]

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By Chad Kidder
In Altium Designer, computers, EDA
Posted March 26, 2016

Pro Tip: Moving Multiple Component Primitives in Altium Designer

Sometimes you have a design where you don’t want to make a new footprint, but need to move a certain track or via 10 mil one way… for 30 copies of the same footprint.

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By Chad Kidder
In Circuits, Embedded Systems, hard hacks, MSP430, USB
Posted January 1, 2016

Lighting the LEGO Salt Lake Temple

2015 was a busy year.  The project that I had the most fun with was a bit off the beaten path compared to what I normally do.  This started off as a fun project for a friend.  It started off [...]

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 Gotcha with the TI TCA6408A
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By Chad Kidder
In Circuits, Embedded Systems
Posted January 1, 2015

Gotcha with the TI TCA6408A

The TI TCA6408A is a wonderful little chip when you need a few more I/O. It’s simple to program and use… so why did pressing the button attached to one of the pins cause the chip to [...]

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By Chad Kidder
In 8051, Bluetooth Low Energy, iBeacon
Posted January 1, 2014

iBeacons on the TI CC2541

I’ve been working on a new project that involves the creation of an iBeacon.  For those not familiar, an iBeacon uses a Low Energy Bluetooth (BLE) advertisement to tell devices, “you [...]

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