document updated 19 years ago, on Apr 5, 2006

blink an LED (see the associated wisp "hello world" project)
turn an LED on and off with one switch
boolean logic — take two input lines, and put some combination of them on the output: and, or, xor, nand, nor, etc.
when a switch is pressed, turn an LED on, then after some time period, turn back off
fade an LED from bright to dim and back, over and over (eg. PWM)
have the chip send "hello world" via RS232 to the computer, over and over (see an implementation here)
have the chip wait for data to be sent via RS232, and echo back letters increased by one (eg. sending "hal" will get back "ibm")
drive a piezo output (eg. like this)
drive a stepper motor