Found in Electronics Now from the 1980s, this amplifier can also be seen in commercial amplifiers of the time. The integrated used is uncommon nowadays. The power is 33 W.
This circuit was found in a March 1988 Radio Electronics. The voltage scale is set at R3. 19 LEDs...
This is a VU-meter bargraph with up to 7 LEDs according the Power supply voltage. Adjusts are made by...
August 2017 - Texas Instruments' new integrated circuit BQ25872, a 7-A keyed battery charger with...