Using the TDA7052A audio amplifier to generate a five octave, linear in pitch voltage-controlled oscillator (VCO).

Abstract: The paper presents a control strategy for balancing DC-link capacitor voltages in a five-level hybrid diode-clamped (5L-HDC) inverter, consisting of two half-bridges and diode-clamped cells.

Abstract: Nowadays, DC (direct current) motors are widely used in industry. Air conditioners, computer drives, electric toothbrushes, portable vacuum cleaners, drilling machines, trimmers, food mixers ...

The US government now admits failures by the pilots of an Army Black Hawk helicopter and a controller in the Reagan National Airport tower during the January 29 midair collision over the Potomac River ...

D.C. voters will have more of a say in who gets elected to office come June 2026. That month's primary is the first time ranked choice voting will be in place, after the D.C. Council cleared the way ...

Cyclists and people riding scooters along the Metropolitan Branch Trail are being greeted with digital messages either telling them their speed is safe or urging them to slow down.(WTOP/Scott Gelman) ...