Tutorial on interfacing Silicon Labs CP2102 USB-Serial chip with any microcontroller. Instructions to install driver, block diagram, pinout, and pin descriptions included.
Tutorial on interfacing Intersil/Renesas ISL1208 Real-Time Clock chip with Arduino boards through I2C interface. Arduino compatible library and example code are included.
ptScheduler is a non-preemptive task scheduler and timing library for Arduino-supported microcontrollers that helps to write non-blocking periodic tasks easily.