Sometimes you feel low, and sometimes you feel high - cause your logic levels are opposite what they should be! But this easy-to-use inverter chip will flip that frown upside-down.
This chip is spec'd to run at 5V but we've run it at 3V just fine. Power it by connecting up GND and VCC to your desired output logic level. High-level inputs can be as low as 2V and the output will be inverted on each of the 6 pairs of inverters. It's breadboard and perf-board friendly.