Even the lowest grade frequency counters are often the most accurate instruments on the bench. Here, we'll describe their general principles of operation, construction and retrofitting into existing equipment, all the way to a full blown universal counter.
No test bench is complete until it has an RF signal source of some type. Here is a sweet general purpose RF signal generator that won’t take up much space and can be built on the cheap.
Just when you thought there were no more cool electronic clocks to build, this Arduino-controlled version showed up.
Sweep generators have a lot of uses in the design, prototyping, and troubleshooting of amplifiers, filters, and radio circuitry. They can greatly speed up these tasks by presenting many parameters at one time. Your bench could be sporting a unit like this for around $100 in parts... plus your labor, of course.
Want to be sure you’re playing musical chords correctly? This unit will tell you if you are and display a light show in the process. I stumbled upon this circuit while trying to design a custom frequency tuner for my guitar and is hands down the best sound to light device you could ever build.
Those 8 x 8 matrix displays are good for more than just making scrolling signs. With a little imagination and a whole lot of extra time on your hands, you can actually use them to create simple yet amazing little action games. If the game is interesting enough, at some point you stop noticing that it is taking place on a field of only 64 LEDS. The only thing that matters is victory.
Now, while I’m sitting in my favorite chair, I can listen to Internet radio stations or play artists, albums, or individual songs from a Flash drive plugged into my Raspberry Pi. Get step-by-step instructions on how to turn your RPi into a remote-controllable Internet radio/music file player.
Since the time when solid-state amplifiers were first designed using early power transistors, a great deal has been done to improve them. This article will show you how to construct an inexpensive amplifier; the power supply described here will run two channels.
The Raspberry Pi represents a breakthrough in low cost computing power. Get a piece of this popular DIY action by learning how to cook up your own RPi to start experimenting with.
This unique timekeeper will have you seeing stars ... even the same skies the Spanish missionaries observed back in the 1600s!
