Kits for Kids

摘要

As a teenager, I built many "computer" circuits with relays and switches. As I recall, a flip-floprntook two 2PDT relays and a binary adder took two 4PDT relays in my brute-force logic circuit. Kids today can get started exploring computers more easily.rnRecently I took a close look at the mbed computer module that provides an ARM Cortex-M3 microcontroller and I/O connections for serial, I~2C, SPI, CAN, PWM, and Ethernet ports as well as for analog I/O signals. The mbed module includes four LEDs that turn on or off under software control.