While refurbishing an ageing audio mixer, I decided that the level meters needed special attention. Their rather horrible 100 µA edgewise movements had VU-type scales, the drive electronics being just ...

At the end of the DI for a Simple log-scale audio meter, I promised to show how to upgrade it to work better. With these fixes, it now has near-digital performance, with faster response and smoother ...

Smart cities are no longer just science fiction elements, as “internet of things: devices and self-driving cars and trucks are already a reality and produce a lot of data. The ability to capture, ...