I haven't have a power supply for lab purposes for a long time ago but sometimes it would have been necessary. Besides the adjustable voltage it is also very useful to limit the output current e.g. in case of testing newly created PCBs. So I decided to make it by myself from available components. https://youtu.be/E7s_AK3arWc... Bővebben →
Small Speaker from Bottle Cap
In this small project I would like to show you how to make a very small loudspeaker for your phone at home.