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Electrical

Ohm’s law for DC and non-inductive AC currents

Thinking of a rewiring job? Here’s what you need to know Issue 29 : Mar/Apr 2003 There re a few fundamental principles you need to understand before you do any boat wiring. They are derived from Ohm’s...

One of the simplest and most prized projects on Cade and Lisa Johnson’s Polaris 43 is this array of colored LEDs inside a 6-inch woven basket. They use this upside down in the cockpit as a night light.

Modern lighting projects for cruising sailboats Issue 44: Sept/Oct 2005 WE BEGAN TINKERING WITH LED lighting in our boat several years ago. Since then we have completed numerous small lighting project...

A typical wiring diagram for a single solar panel. An ammeter can be inserted in the positive line from the solar panel for monitoring output.

Keep your batteries topped up with a slow but steady charge Issue 46 : Jan/Feb 2006 On a bright, sunny day, with the sun directly overhead, the sun supplies about 1,000 watts of energy per square mete...

The simplest and most inexpensive inverters merely plug into a boat’s cigarette lighter outlet. These can supply up to about 150 watts of AC power to low-wattage devices and usually have a square-wave output.

Converting battery power to alternating current Issue 62 : Sept/Oct 2008 An inverter is an electronic device that converts direct-current (DC) power (the output of your boat’s battery) to alternating-...

Kerosene anchor light. This type of anchor light may be attached to the forestay. There is a semicircular bail under the bottom of the anchor light. usually a shock cord is attached to this bail to reduce the anchor light’s swing as the boat rolls.

Complying with regulations Issue 63 : Nov/Dec 2008 It seems that recreational vessels anchored without anchor lights are more the rule than the exception. However, the International Regulations for Av...

For a small investment in thought, time, and coin, Vern earned a tidy dividend.

Unruly wires get herded onto a bus Issue 72 : May/Jun 2010 Recently, a failed torque damper required the removal of our good old boat’s good old engine. I made arrangements with the yard boss to have ...