A motley collection of ideas
I wanted a simple, inexpensive antenna for my Little Airshow Radio. The 108–137 MHz range is the VHF airband, where the wavelength is roughly 2.18 m to 2.73 m. That means any resonant antenna designed for this range tends to be physically large. If you’re looking for a small, portable solution, you’ll need to make a few compromises. … Read more
Below is a cheap automatic bird feeder you can build in 20–30 minutes from household materials with a few simple tools. Why winter feeding matters Winter can be a lean season for small birds: short days, cold nights, and snow or ice can make natural food harder to find. A simple feeder can help birds … Read more
Anyone working with electronics will eventually hold a component that you need to identify—what it is, how its legs connect, if it’s the right value, or whether it works at all. Testing with a multimeter A knowledgeable person can learn a lot even with a basic ohm-meter. Some multimeters include diode-test or transistor current gain … Read more
The JYE Tech DSO 068 is a do-it-yourself oscilloscope kit that’s easy to assemble. Anyone who can solder well, has some basic electronics knowledge, understands a little English, and owns a digital multimeter can confidently take on the task of building it. The kit’s list price is $79 (around 23,000 HUF at the time of … Read more