A motley collection of ideas
Vintage radios are more than just functional electronics — they’re beautiful pieces of design history. From rich bakelite cabinets to finely woven speaker cloths, every detail was crafted to be both functional and elegant. But when it comes to restoration, some of the most iconic details can be the hardest to replace — especially the … Read more
The river was calm that morning, silver mist curling above the water. I have always believed that the best meals begin not in the kitchen, but in the fields, gardens, and streams. When the trout tugged, I already knew what was for dinner… Details Serves: 2Preparation time: 1 hour Ingredients Fish Parsnip purée Preparation Grate … Read more
The other day, I explained to my partner how a fluorescent starter works and what the ballast is for. I won’t go into it now—if you’re interested, look it up. I also explained why electronic ballasts are supposedly better than traditional ones. Well, I was wrong: they aren’t better. Every self-respecting electrician or hardware supplier … Read more
In Hungary, the use of radio frequencies is regulated by the National Media and Infocommunications Authority (NMHH). The NMHH has published the National Frequency Allocation Table and Frequency Use Regulations. Radio Frequency Bands Abbreviation Frequency Range Wavelength ELF 3 Hz – 30 Hz 100,000 km – 10,000 km SLF 30 Hz – 300 Hz 10,000 … Read more
A quartz crystal equipped with electrodes behaves electrically like a resonant circuit with a high quality factor (Q). With its help, oscillators of high frequency stability can be built. Quartz oscillators are now widely used as frequency or time standards in processors, microcontrollers, radios, and quartz watches. Oscillators An electronic oscillator is a circuit that … Read more
This circuit is a simple flasher that produces strong and short flashes. If you already know how a transistor works, you’ll have no trouble understanding how this thing operates. You can find the circuit on Tinkercad here: 👉 https://www.tinkercad.com/things/jn4ZX0OA4qi-flashing-light Although it works in a very simple way, this circuit actually exceeds the capabilities of Tinkercad’s … Read more
This circuit is a simple, contactless wire / mains voltage detector. It can detect 230 V mains wiring from a distance of 10–15 cm, indicated by a red LED and a buzzing sound. You can find the circuit in Tinkercad: 👉 https://www.tinkercad.com/things/cZa2iaSgAAG-wire-tracer The L1 coil is a self-supporting air-core coil. It can be made from … Read more
A popular variant of the well-known NE555 timer IC is the NE556, which contains two timers. With this IC, you can build a simple siren. This siren alternates between two tones, similar to old police car sirens, while also flashing a blue and a red LED. You can test the circuit in Tinkercad: 👉 https://www.tinkercad.com/things/lsxjw2LzvA7-police-siren … Read more
Barches, or challah, is a traditional baked good of Jewish cuisine: a braided yeast bread or sweet roll, sometimes enriched with potato. In families that keep Jewish dietary traditions, it is a customary element of the Friday evening Sabbath table. Details Serves: 4Preparation time: 1 hour Ingredients Preparation Sift the flour into a bowl and … Read more
This is a simple sound generator that can be controlled by light or by your fingertip. If you illuminate the photoresistor with a lamp or cover it with your hand, the pitch of the sound changes. You can try it out in Tinkercad: https://www.tinkercad.com/things/aEJgBAQp91s-fingertip-organ Instead of the photoresistor, you can place two bare wires that … Read more