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66pacific.com - Resources for amateur scientists :)
Resources for amateur scientists, aquarists, and radio and electronic designers

ELECTRONICS CALCULATORS

Online Calculators for Radio & Electronic Design
Online calculators for designers, scientists, and engineers.

Capacitive Reactance Calculator
A free online capacitive reactance calculator

Inductive Reactance Calculator
A free online inductive reactance calculator

Coil Inductance Calculator
A free online tool for coil winding calculations

Toroid Winding Calculator
A free online tool for ferrite and iron powder toroidal coil winding calculations

Using the Toroid Winding Calculator
How to use the toroid winding calculator

Wire Gauge & Diameter Calculator
A free online tool for wire-gauge-to-diameter and diameter-to-wire-gauge conversions

Small Transmitting Loop Antenna Calculator
A free online tool for designing small transmitting loop antennas

pH Measurement & Control Circuit - Intro and Getting Started
How to build a pH measurment and CO2 control circuit for a planted aquarium.

HEALTH AND FITNESS CALCULATORS


Body Mass Index ("BMI") Calculator
A free online body weight assessment calculator

THE pH PAGES

The pH Pages
pH measurement, pH control, and pH measurement components

Buying a pH Meter
How to select and buy a pH meter

How to Calibrate and Care for a pH Meter
How to Calibrate and Care for a pH Meter

pH Test Kits
Information about pH test kits

pH Probe
Information about pH probes

pH Calibration Buffers
pH calibration

Calcium Carbonate pH Buffer
Information about calcium carbonate buffer.

The Simplest Possible pH Meter
The simplest possible pH meter: an op amp, a volt meter, a pH probe, and 2 batteries

pH Measurement & Control Circuit - Overview, Theory of Operation, Fundamentals
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Voltage Regulator and Reference Ground
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Amplifier
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Inverter and pH Display
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Comparator
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - CO2 Valve Actuator
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Final Setup and Calibration
How to build a pH measurment and CO2 control circuit for a planted aquarium.

pH Measurement & Control Circuit - Photos
How to build a pH measurment and CO2 control circuit for a planted aquarium.

Schematic for ph Measurement & Control Circuit
Schematic diagram for a pH measurement and CO2 controller circuit

Part List for pH measure/control circuit
Parts list for a pH measurment and CO2 control circuit for a planted aquarium.

COMPUTERS


How to Import an Excel Spreadsheet into a SQL Server Database Table Using the SQL Server Import and Export Wizard
Create a new SQL database table from an Excel spreadsheet in nine steps.

How to Export a Table from SQL Server to an Excel Spreadsheet with the SQL Sever Import and Export Wizard
Export a SQL database table to an Excel spreadsheet in nine steps. 

THE CO2 PAGES


CO2 & the Planted Aquarium
How to add CO2 to your planted aquarium

Setting Up a CO2-Injected Aquarium
How to set up CO2 Injection for a Planted Aquarium

CO2 Tank
How to add CO2 to your planted aquarium

CO2 Regulator
How to add CO2 to your planted aquarium

Solenoid Valve
How to add CO2 to your planted aquarium

Metering Valve
How to add CO2 to your planted aquarium

DIY CO2 Injection for the Planted Aquarium, Electronically Controlled
An improved method for Do It Yourself (DIY) CO2 injection for the planted aquarium. A simple electronic controller (2 Radio Shack ICs) allows control over pH and CO2 level in the tank.

CO2 Injection System Schematic Diagram and Explanation
Schematic diagram for a circuit that controls injection of CO2 into a planted aquarium.

CO2 Controller Parts List
Parts list for a pH measurment and CO2 control circuit for a planted aquarium.

BOOKS
Recommended Books
Some of the best books on electronics theory and practice

SOFTWARE
Recommended Software
Useful software for electronic design and simulation, and for everyday use

CONTACT INFORMATION

Contact Us
Contact 66pacific.com by e-mail.