LED Project - 15 LEDs
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Experimental LED Light Construction Project

More light wanted

We tried making an LED light array with 3 white LEDs, then 4 white LEDs, but when we wanted even more light, we used 15 white LEDs.

Using similar construction techniques as our other projects, we drew a template and drilled a piece of circuit board, to fit in a 1 1/4 inch PVC connector.
template with LEDs inserted on backing

With the LEDs carefully inserted in the circuit board, we soldered all the negative leads together. A simple spiral worked fine.
Negative leads soldered together.
We used 470 ohm current limiting resistors, one per LED, soldered on the positive lead. Note that these are 1/4 watt resistors. We should have used 1/2 watt resisters. Going back over the math, each resistor is operating right at its rated power, with no room for safety.
With resisters and positive lead attached..

It all fits inside a 1 1/4 inch PVC connector.
PVC Pipe Connector.
Here it is, installed in a retro-fitted goose-neck light fixture, held in by the switch assembly. This plugs in to a normal 12 volt deep-cycle battery operating at 13.8 volts while being charged.
The finished emergency light.

This construction project brought to you through the efforts of
Glade Powell (KK7LW) and Robin Tuck.
We hope you enjoy this and come up with interesting and useful extensions.


Cascade and Provo Mountains, part of the Wasatch Front