A supermassive black hole with an exceptional 7-minute flash may have a “stellar companion.” Of three possible explanations, one is a white dwarf star caught in the black hole’s gravity. Scientists ...

[esot.eric] was trying to drive a motor and naturally thought of using pulse width modulation (PWM) to control the motor speed. However, he found that even with a large capacitor, his underpowered ...

[WilkoL] notes that historically, the job of generating pulses of varying length and frequency would be achieved with a smattering of 555 timers. While this is a perfectly cromulent way to do so ...

The trick to creating a better quantum sensor is to give it a little ‘squeeze’ American and Canadian scientists have ...