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Category Archives: c-electronics
Poor Man’s Conductive Pre-Compliance Testing
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
Scammer Jammer Telemarketer Call Blocker
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
Cermetek CH1724 Modem PTH Adapter Board
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
Cleaning Flux from Printed Circuit Boards (PCB)
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
Project Box Graphics
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
Cutting Holes in an ABS Plastic Project Box
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
How to use VeeCAD Stripboard Editor with CadSoft Eagle
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
SIM800L GSM/GPRS Part II – Seeking Stability
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
SIM800L GSM/GPRS Cellular Eval Board First Look
I’ve built a project using a SIM900 GSM/GPRS dev card. It works fine, but that dev card is too big to fit in the project case and kind of expensive (comparatively speaking). I went looking for another solution and found … Continue reading
