Fake tracking numbers are a common occurrence in scams now. Somehow the scammers are getting access to a database of real time legitimate tracking numbers, they wait until there’s a shipment in their database going to the same city as the buyer, and then use that tracking number to claim that they shipped the package. Maybe they’re paying a real merchant for access to their shipping database? Or are UPS tracking numbers short enough to brute force?
Higher frequency means smaller and therefore lighter transformers, which is very important on aircraft. Nowadays a DC voltage supply would be better, but DC to DC voltage converters didn't exist when the 24V 400Hz standard was created.
For mains voltage we use 50-60 Hz because lower frequencies work better with very large AC generators in power plants and, and lower frequencies are more efficient to transmit long distances.
Yeah fair. But I think that any gc language for microcontrollers should have a couple features:
1) A compiler flag or similar optional static check that throws a warning if you have dynamic memory allocation. In scripting languages it can be easy to do accidentally
2) A way to block the gc from happening in a time critical section of code, like how you can disable interrupts
3) Some guarantee on the maximum time gc will take