Idiot guide to running lights
HI Dave
LEDS are excellent at providing lighting for models. in particular they generate little heat and are very low current so will not flatten your battery.
You can buy electronic switchers to control the lights using a spare channel to send the on/off control. Alternatively you can use an on board on/off switch using either the receiver od main power battery.
LEDS only require a low voltage of approx 2.5 to 3.3 volts depending on the colour and are often used with an inline resistor to limit the current ( max usually 20mA) when used with higher voltage batteries.
My Olympic uses about 500 LEDs in the portholes and they are wired in parallel and fed from a variable regulated circuit that allows me to balance the individual circuits. I use 5mm and 3mm LEDs that have different current requirements hence the need for mutiple circuits. I have used a remote control dimmer between the battery and my regulators and use this to vary the voltage allowing me to vary the lighting to suit the display. its very like a key fob with buttons to increase/decrease as well as on/off. Component Shop stock them, but you do need a regulator or resistor in series with the LED as the dimmer requires a load to work correctly.
You can link several LEDS in series so that they run off the battery voltage, Christmas tree lights use a similar method, and LEDS can be bought in lengths suitable for particular voltages.
They are polarised and need to be connected to the correct polarity or they won't work. Provided they have a resistor attached, wrong connection will do no damage.
The best type are the high intensity type and they can be had in a range of colours and sizes. As different colours require different voltages it is best to attach a resistor to each LED to avoid problems, especially with the red and green used fr navigation.
You can also now use surface mounted devices which make excellent bulkhead and ceiling lights. I use self adhesive copper strips ( ve & -ve) and solder the LEDS across the gap. When painted you can't see the copper.
Sorry if I have given too much info but you won't regret adding this detail. There are details in Build Blogs of my RMS Olympic.
Please keep us posted with your progress
Dave
Live long and prosper
Dave