Modulation basics, part 1: Amplitude and frequency modulation. Modulation is perhaps one of the most complicated things that I have to explain in my one-day Tech class. Perhaps if I could get my students to read this article before I try to explain it, they would understand it a bit more.
How to Read Datasheets: Logic ICs. This is #5 in a series of articles on digital ICs. This particular articles discusses the evolution of complementary metal-oxide semiconductor (CMOS) technology and how CMOS technology differs from transistor-transistor logic (TTL) technology.
10 Best Single Board Computers for 2018. Arduinos and Raspberry Pis are all the rage in amateur radio, but there are a number of other single-board computers that might be worth looking at for your amateur radio projects.
Dave New, N8SBE says
There was a conversation on the 360 Home Brew Workbench podcast last year (I’m still catching up) that Raspberry PI’s suffer from SD card burn out. In other words, the repeated writing to the SD card eventually causes failures, so it is not a good choice for something that runs 24/7, especially in a remote location that might be hard to access. Instead, the Beagle Bone Black was mentioned, as being much more robust, due to its use of EMCC memory to run the OS on.
First I’d come across this.
Dave New, N8SBE says
Sorry, that’s eMMC memory, not EMCC.
Frank M. Howell says
There was an add on HD product for the RPi a couple of years ago that was bootable. It would largely negate this issue. But it was about $100 as I recall. Just FYI…