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TOPIC: Cigarette Lighter Voltage

Cigarette Lighter Voltage 15 hours 18 minutes ago #1425

  • STEVE ELLS
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If you want to use one of this type of adapter, make sure it can handle 28 volts and test it during flight with your iPad or other device plugged in to make sure it doesn’t affect your communications.
Lonestar Aviation makes a plug-in power to USB converter it sells for $89.95. Lonestar says it’s plug in converter has been built to comply with RTCA DO160G, a standard for aero electronics and electrical equipment.
If you want to permanently install a USB power plug there are a number of options from companies such as Mid Continent Instruments, Electronics International, Appareo, and Guardian Avionics all sell aircraft quality USB power outlets.
I installed the Guardian Avionics “Smart Power” dual outlet in place of my cigarette lighter. It’s FAA approved for installation and works fine.
There is an in-line thermal circuit breaker attached to the back (forward side) of most Cessna cigarette lighter that often gets tripped. If you don’t find power at the cigarette lighter, try to re set the circuit breaker first.
Here’s the procedure: The circuit breaker may be reset by inserting a small probe into the .078 diameter hole in the back of the circuit breaker and pushing lightly until a click is heard.
The FAA issued airworthiness directive (AD) 79-08-03. The AD applied to a wide range of single engine Cessnas ranging from the 120 up through the 210s. It required the installation of a properly rated circuit breaker or fuse in the power wire to the cigarette lighter. The 182, for instance was subject to the AD until mid-1978. The AD didn’t apply to 28-volt Cessnas.
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Cigarette Lighter Voltage 2 weeks 2 days ago #1385

  • STEVE ELLS
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Unfortunately many of these USB plug in chargers designed for cars are unsuitable for use in an airplane due to poor shielding; if you try one and find there a lot of noise in your radios, it's being generated by the plug in USB power converter.
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Cigarette Lighter Voltage 3 weeks 2 days ago #1369

Same voltage as your airplane (first 28V models used to have a drop resistor). Today most electronic devices handle a wide voltage range. Here is an example:



As Bob said, if you want USB, a dedicated port is the best solution. But if you prefer to occasionally plug a USB adapter in the lighter socket, use a good quality adapter which works in both, 12 and 24 volts vehicles. Like this one:

Last Edit: 3 weeks 2 days ago by Jose Lopezdelpuerto.
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Cigarette Lighter Voltage 3 weeks 5 days ago #1365

  • BOB WEBER
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There is a growing array of choices, I would suggest a USB port installed in an abandoned instrument hole with a dedicated breaker. Any other devices needing 28 volts should have a dedicated breaker as well. The wiring will need to be accomplished, then signed off to be legal.

Bob Weber
Autopilot consultant
WebairConsulting.com
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Cigarette Lighter Voltage 3 weeks 5 days ago #1364

Does anyone know what the voltage if the cigarette lighter is? And if its 24 volt, are there any recommendations on how your getting power for your electronic devices?
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