Online Calculators for Radio and Electronic Design

Use these online calculators to build antennas, coils, and capacitors, and to determine electronic capacitance, inductance, and reactance.

The pH Pages

Information about pH measurement and control, and how to build a simple, inexpensive pH meter to control CO₂ injection in a planted aquarium.

CO₂ and the Planted Aquarium

How to set up and maintain an aquarium with CO₂ injection to encourage the growth of aquatic plants, including a simple reservoir system and optional electronic control.

Sitemap

Links to all of the pages at 66pacific.com.

Seattle Weather

Selected weather maps, satellite images, and other weather-related resources.

Contact

You can send comments, questions, corrections, or feature requests to feedback at 66pacific.com.