Remote controls also throw infrared IR light which you cannot see but your cell phone camera will capture it. Just press any button of your remote control and see the that portion of your remote control where a small LED bulb is present, normally it is front side of your remote control. Now if you see it through the camera’s LCD display you will see that the IR LED bulb in front of your remote control lights up if you press any button of you remote control. Imagine if you have a lot of such bulbs grouped together and you light them up then your camera will be able to see clearly even without the visible light. Human eyes cannot see infrared IR light therefore infrared light doesn’t disturb sleeping persons as well.

In simple words, many infrared IR LEDs grouped together to throw good amount of IR light are called Infrared/IR Illuminator. You can easily build an infrared illuminator yourself at home with a little effort. You should have basic electronics knowledge on order to attempt this simple IR illuminator project.

Here is the infrared IR circuit diagram.

Infrared IR Circuit Diagram

There is nothing difficult in this circuit. I have used 68Ohm and 1 Watt resistors in this circuit diagram. The Infrared LEDs are easily available from every electronics store. Some users have reported that they have successfully used 5 LEDs in per series which made the LEDs a little brighter however it is up to you, you can do some experiments by changing number of LEDs.

For fitting purposes, I used general wiring board available in the market and fit the Infrared IR LEDs in such a way that they make two circles. A large circuit and a small circle inside the large circuit. This gave the Infrared light a torch like effect by concentrating IR Infrared Beam in a small area. After the fitting, I cut the outside of the wiring board in a round shape and fit it inside an old Torch’s body. Now I use it as an infrared Headlight in my backyard along with my security camera.

Voltage Regulator Circuit Diagram

Here goes the parts list.
1. 240V to 15V 1.2A Transformer
2. 4 pieces of IN4001 (You can use a bridge rectifier as well)
3. 220uF 25V Capacitor
4. .1uF 25V Capacitor
5. 7812 IC (Integrated Circuit)
6. A heat sink plate for 7812 IC
7812 is a very good voltage regulator integrated circuit (IC). It is cheap but efficient, that is why I selected it for this regulator circuit. 7812 Pin2 connections are also explained in my regulator circuit diagram. You can see that Pin 1 is input, Pin 2 is Ground (which is often –V) and Pin 3 is output. It is very simple to understand 7812. The 220uF 25V capacitor is used as a buffer to cover frequency gap. The second capacitor is used as an extra filter. IN4001 rectifiers are used to convert AC current into DC current. Transformer is used to convert 240V AC into 15V AC. If you have 110V mains then you can use a 110V AC to 15 AC transformer.
I have successfully used this voltage regulator circuit to power up my ADSL modem. In fact, the ADSL modem was restarted every one hour or so with its original power supply but after I replaced it with this voltage regulator circuit, the modem is never restarted by itself. Any electronic device which requires 12V 1A power can be powered by this circuit so feel free to use it. You can post your questions and comments in the comments section bellow.