A lot of great ICs use I2C to communicate, but debugging a non-working I2C setup can be opaque, especially if you’re just getting started with the protocol/bus. An I2C bus scanner can be a helpful ...
A lot of parents worry when their kids first start taking the school bus by themselves. What if they’re snatched from the bus stop? What if they get off at the wrong stop? What if the bus is hijacked?