Archive for June 2022

LUMI supercomputer

New European supercomputer is inaugurated in Finland. LUMI is the fastest and most energy-efficient supercomputer in Europe, ranked also the third fastest in the world. It will have an expected peak performance of 550 petaflops (550 million billion calculations per second) while being fully powered by renewable energy: LUMI uses natural cooling systems and its

Outdoor wiring dip loops

What is a drip loop? The drip loop is a slack bit of cable that sits lower than the rest. The whole purpose is to let water pile up at the bottom and drip off. If your cables were tight, water from outside could travel down the wire and get straight into an outlet

EU mandates USB-C charging

The European Parliament and the Council of Europe have announced the introduction of a universal charger for mobile devices is to be taken to use. The preliminary agreement on the reform of the Radio Equipment Directive means that certain electronic devices will in future be charged with the same charger. By autumn 2024, USB Type-C

Speaker to line level attenuator

I saw in Facebook DIY audio group a question about suitable voltage divider resistance values to step down an amplifier’s output (approx 28vrms) to for example around 2.8v. The aim is to use the speaker outputs of an integrated amplifier or AV receiver to run an external power amplifier. Its obvious that a 10:1 ratio

Audio transformer DC

Transformers will only work with a changing current (AC). Transformer only works on AC and can’t be operated on DC i.e. it has been designed to be operated only and only on alternating current and voltage. The transformer works on the principle of mutual induction, for which current in one coil must change uniformly. The