Archive for August 2015

Fluorescent lights safety and updates

I just saw old fluorescent light replaced with new one. This was the old one: This is the new one: In new one there is electronic ballast. What are the problem with old ones? Fire danger caused by failing capacitors and by heating of different parts of lamp (tube ends and ballast) when old tube

Reversible USB connectors

One of the frustrating issues on traditional USB connectors has been figuring out how to them plugged in the right way. In theory you should be able to plug in USB plug with maximum two trials (both directions), but in practice it can take even more attempts. This is sometimes frustrating, for example when smart