Archive for February 2024

Kemo LED tester

Here is a look at old KEMO M087 LED tester module (the original M087 is discontinued product but there is a newer different looking M087M product. With the aid of this test module it is made possible to carry out tests with all kinds of light emitting diodes in order to check function, brightness, colour

Cray computer sofa

This picture from Supertietokone, joka toimi myös sohvana article shows the classic Cray supercomputer from the 1970s and 1980s, which was specially designed – as Cray computers have always been. It does not a traditional computer, but as a strange seat. And you can really sit on one of those if you get access to

Induction heater wireless LED

Inductive cooker powers a LED wirelessly. The kettle needs to be here to keep the inductive stove to be turned on (it will turn off when no big metal object is detected on heating area). This LED circuit worked for me for a short test, but there is no guarantee that it will work for

Qi Charger LED Flasher

Here is one experiment to power two LEDs using Qi standard smart phone charger. The two LEDs are wired to opposite directions in parallel to the output wires of 0.17 mH coil. The coil has around 80 turns (5 layers and about 16 turns each) Here is LED active I actually built two circuits with

Oral B toothbrush charger

Wireless charging for toothbrushes offers a convenient and cable-free solution. Wireless charging eliminates the need for physical connectors or USB cables. Toothbrushes are commonly used in wet environments (bathrooms), and wireless charging systems for toothbrushes can be designed to be water-resistant. It’s a well-known fact that electronics and water do not go together. Most electric