The IR Illuminator is based around our LED SpotLight PCB which holds a total of 24 LEDs on a circular PCB. The board is equipped with 24 special IR LEDs which do all of the work, along with 8 current limiting resistors. This project is very simple to build up, and can be fully assembled by a novice builder in about 30 minutes.
On our website at www.pcboard.ca, we produce a number of unique and exclusive LED products and accessories including solutions for mounting LEDs.
When you build your IR Illuminator, you need to decide what frequency of LEDs to install on the board. There are two common frequencies available, one at 940nm and the other at 850nm. The most commonly used frequency with black and white CCD cameras is the 940nm model.
850nm LEDs produce a very slight red glow when operating, which is visible to the human eye. 940nm models produce no visible light to the eye.
We carry both frequencies of the IR LEDs, see our LED Page and look for model IC601-02 for 850nm and IC601-03 for the 940nm models.
When complete, the system will produce a circular spotlight on the wall about 10-foot (3 meters) in diameter at a distance of 10-feet (3 meters) which is more than ample to light up a front door waiting area or a location outside.
Step 1: Getting The Parts Together
Once you have all the parts, the first step is to become familiar with the PCB. It is setup with 24 LEDs in total, 16 around the outside and another 8 on the inside (all the LEDs are labeled D1 to D24). The resistors will go on the board at position R1 to R8 which are located between the inner and outer rows of LEDs. Finally, power is applied to the board just below D24 where you will see the Positive and Negative solder pads. In the very center of the PCB is a single hole. This hole can be enlarged to be used for mounting or even further to fit around a camera lens.