CAN bus turned 40 this year: Bosch unveiled it in 1986 so car computers could share 2 wires. When nodes collide, the lowest message ID wins and nothing is lost. Still inside cars, robots and industrial IoT. fluidwire.com #CANBus #EmbeddedSystems #Fluidwire

Wire gauge runs backwards: 12 AWG is thicker than 24 AWG. The number counts how many times the wire was drawn through a die -- more draws, thinner wire. Six gauges up doubles the diameter. Why your breadboard jumper browns out an ESP32. #IoT #EmbeddedSystems #Fluidwire

Why is a byte 8 bits? It was not always. Early machines used 6, 7 or 9 bit bytes -- IBM System/360 fixed it at 8 in 1964. That is why network specs say "octet", and why C promises CHAR_BIT >= 8, not == 8. fluidwire.com #IoT #EmbeddedSystems #Fluidwire

Hello, World started in 1972 in Brian Kernighan's Bell Labs tutorial for the B language. The embedded version is Blink: one LED proving your toolchain works before you write real firmware. fluidwire.com #IoT #EmbeddedSystems #Fluidwire