- Published in issue 12/1994 on page 90
Dual-purpose LED display
The display is intended as a turning indicatoror a VU meter on a stereo FM radio. The first function is selected by pressing S1 (which may, of course, be replaced by a normal on/ off switch). Depending on the mode selected, the circuit acts as a single linear scale (for the tuning voltage), or a stereo VU meter with a quasi-Iogarithmic scale.