When you are sure which lead goes to which, it is time to solder the wires to the 12v battery. ![]() When it is lit, the black test lead will be attached to the cathode, and the red test lead will be attached to the anode. Once the LEDs are in position, examine them and find the leads the negative lead (or cathode), can be identified in one, or more than one, of these ways: it is the shorter lead, it is a flattened section on a round LED, or inside the LED, each lead is attached to a triangle-shaped node the positive lead (or anode) is attached to a larger node.Ī diode test function meter will light up the LED when correctly applied. This can be done by checking the current with a voltmeter, or by wiring both items to a lamp or device which is known to work. This is the length of wire necessary to connect the LEDs to the power supply.īatteries and switches should be checked for faults before being wired to the LED home lighting system. Locate a nearby place to put the battery and on/off switch then, measure the distance between where the lights are and where these will be. Leaving a battery to dangle will eventually cause connections to break. ![]() Unless you are installing these near an existing 12v battery supply, prepare to build a ledge, box, or other support. Batteries operating lights on a high wall, for example, will need to have something supporting their weight. ![]() The first thing that needs to be done when connecting LEDs to a battery is to consider where they will go.
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