The new technology may appeal to kids used to interacting with voice-activated digital assistants such as Amazon's Alexa, Apple's Siri or Microsoft's Cortana.
You can hear someone at Google say "Ouch!"
Now can i provide a PWM signal to a 4 pin 12Vdc computer fan with an arduino? because it is looking like a 555 timer won't make the high frequencies(24khz i think) that the PWM fans need.
Yes you can. Not exactly 24kHz. But 32kHz. Which works very well with the Owltech fan (4 pin) I have. http://www.formfactors.org/developer%5Cspecs%5C4_Wire_PWM_Spec.pdf says: 21-28kHz. When I use lower frequencies I can hear a buzzing. It worked at 500Hz just fine, with the exception of the slight but annoying noise. Running the fan at 32kHz PWM works fine. No noise, and the fan spins fast and slow as required.
The moving cursor writes, and having written, blinks on.