Category Archives: c-electronics

General Electronics Posts

Woof Off! PCB Files

Posted on August 29, 2019 by

Göran Cronström graciously shared the PCB CAD files he made for the Woof Off! project.  He created both a SMD version and a PTH version. Awesome, and thanks Göran! The SMD version is here: http://www.xyfyx.com/files/WoofOffFabSMD.zip While the PTH version is … Continue reading →

Posted in c-electronics | Tagged , | 1 Comment

Woof Off! – A Device to Control an Out-of-Control Barking Dog

Posted on March 13, 2018 by

A friend came to me a few months ago asking for help building something to stop his neighbor’s barking dog. I’ve been having the same problem for a few years now, so I was definitely interested. I’m fortunate enough to … Continue reading →

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Poor Man’s Conductive Pre-Compliance Testing

Posted on December 19, 2017 by

I want to do some pre-compliance testing on Scammer Jammer. I have an inexpensive spectrum analyzer to do radiated testing. Conductive testing requires more expensive equipment. First, you need an LISN device and, in my case, it needs to be … Continue reading →

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Scammer Jammer Telemarketer Call Blocker

Posted on December 18, 2017 by

I’ve not posted much in the past 2 years because I’ve been busy on the project that was, in part, due to the research that I ended up posting here. I didn’t want to post anything specifically about this project … Continue reading →

Posted in c-electronics, c-lazarus, c-Misc, c-teensy | Tagged | 2 Comments

Cermetek CH1724 Modem PTH Adapter Board

Posted on March 2, 2017 by

I need to solder pins to multiple CH1724 modems which look like this: I tried soldering header pins directly, but that was a cluster. So I designed this little adapter board: You can layout header pins on a PCB, put … Continue reading →

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Cleaning Flux from Printed Circuit Boards (PCB)

Posted on November 22, 2016 by

I got some professional looking PCB boards manufactured for a project recently. The boards look great compared to anything I could do myself. Problem is, after I solder on the components and try to clean the flux off, I’m always … Continue reading →

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Project Box Graphics

Posted on April 25, 2016 by

After building my project’s box (see here), I wanted to create some decent graphics. I spent a fair amount of money on the guts, I did a nice job cutting holes, I expect the ‘customer’ will have this for several … Continue reading →

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Cutting Holes in an ABS Plastic Project Box

Posted on April 22, 2016 by

Wrapping up a project and it is time for the case. I purchased a nice heavy duty case from Mouser to use. It needs several holes which are easy enough but it also needs a large rectangle cut out as … Continue reading →

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How to use VeeCAD Stripboard Editor with CadSoft Eagle

Posted on April 16, 2016 by

A project I’m working on is a one-off. Since I’m only building one, having a real PCB created is over kill. In the past I would etch my own, but I’m getting to where the chemicals bug me so I … Continue reading →

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SIM800L GSM/GPRS Part II – Seeking Stability

Posted on April 12, 2016 by

My first SIM800L dev board was a flop when I tried to use it in an actual project. As mentioned at the end of my last post, the reliability of that SIM800L dev board was horrible. The SIM800L chip would … Continue reading →

Posted in c-electronics | Tagged | 13 Comments