PI4ZLB

When it comes to lithium batteries, you basically have two types. LiPoly batteries usually come in pouches wrapped in heat shrink, whereas lithium ion cells are best represented by the ubiquitous c…

Bron: Lithium Ion Versus LiPoly In An Aeronautical Context

When faced with a problematic Bird slug, [Chuck Martin] didn’t give up. He pecked away at the slug and brought us all along for the ride. If that sentence didn’t make sense to you, read…

Bron: The Early Bird Repairs a Slug

Modern radios are often digital affairs, in which the frequency is derived from a stable crystal oscillator and varied through a microprocessor controlled frequency synthesiser. It won’t drif…

Bron: Radio Tuning The Quicksilver Way

[Eric Brasseur] built a radio-detecting snake that consists of a LED that lights up when around reasonably strong radio waves. Near an FM radio mast you’ll find a huge amount of waste energy …

Bron: FM Snake Feeds Off Radio Waves

Space may be the final frontier, but that doesn’t mean we all get to explore it. Except, perhaps by radio, as the US Air Force has just demobbed a satellite and handed it over to the public t…

Bron: Military Satellite Goes Civilian

QRP radio operators try to get maximum range out of minimal power. This term comes from the QRP Q-code, which means “reduce power.” For years, people have built some very low-cost radio…

Bron: A Fully Featured, Fifty Dollar QRP Radio

Like a lot of people, [Bruce] likes radio controlled (RC) vehicles. In fact, many people get started in electronics motivated by their interest in RC. Maybe that’s why [Bruce] did a video abo…

Bron: Antenna Basics by Whiteboard

Het was weer gezellig op de jaarlijkse radiomarkt bij Haje, 3 september jongstleden.