If you're always forgetting when a certain event needs to take place - for example taking the bins out, date night or in the case of the following project's inventor... when to have a shower - then Instructables user "msuzuki777" has the project for you. It's a simple circuit based around an Arduino-compatible that can remind you of acertain day of the week with a blinking LED. The original purpose was to have it remind the creator of which day to take a shower, however it can be used for many other purposes.
It's an interesting example of an Arduino-based timing circuit - with or without a real-time clock IC. Furthermore the author has provided not only the sketch, but also the design files so you can make your own PCB if required. Either way, visit the project pages to get started. And for more, we're on twitter and Google+, so follow us for news and product updates as well.
If you're making your own permanent Arduino-based project such as the timer above - and don't want to banish an entire board - instead get yourself an ATmega328 preloaded with the Arduino bootloader:
This is the same Atmel AVR ATmega328P microcontroller used in the official Arduino Uno, as well as our Eleven, EtherTen, USBDroid, and other boards. Perfect for building your own Arduino-compatible project directly on a breadboard or on a custom PCB, or for replacing the MCU in an existing board. For more information to order, click here.