Master module light source, retainer and kits

1. A combined unit for providing (a) a light source wherein the light source has a first control position wherein it emits light and a second control position wherein it does not emit light, (b) a power source, and (c) a control device to control the power provided to the light source, wherein the light source has a casing and is positioned in a block housing, the block housing having an opening aligning with a lens of the light source to enable light to be emitted outward from the block housing, and at least one surface to which at least part of the control device is mounted;

wherein the control device is a first circuit board and a second circuit board in electrical communication with the first circuit board;

wherein the first circuit board has an electrical contact on an edge and the second circuit board has an electrical contact on an edge and the respective contacts touch to form an electrical connection when the unit is assembled;

wherein the electrical contacts are soldered together;

wherein the second circuit board has a through bolt hole in communication with an end of the light source opposite its lens;

wherein the through bolt hole is plated; and

wherein a spring is retained in the through bolt hole.

2. The unit of claim 1 wherein the second circuit board is at a right angle to the first circuit board.

3. The unit of claim 1 wherein the spring is soldered in the through bolt hole.

4. The unit of claim 1 wherein the spring biases the light source away from the spring.

5. The unit of claim 1 wherein the spring provides a negative contact for the light source.

6. The unit of claim 1 wherein the block housing is comprised of a conductive material.

7. The unit of claim 1 wherein the second circuit board is connected to the block housing.

8. The unit of claim 1 wherein the second circuit board is connected to the block housing by fasteners, the block housing is comprised of a conductive material and the fasteners provide a positive charge to the light source.

9. The unit of claim 1 wherein power from the power source travels through the first circuit board to reach the light source.

10. The unit of claim 9 wherein power from the power source travels through the first circuit board and second circuit board to reach the light source.

11. The unit of claim 1 wherein the light source is a laser.

12. The unit of claim 1 wherein the block housing has at least two sides and the first circuit board is connected to one of the sides and the second circuit board is connected to another of the sides.

13. The unit of claim 1 wherein the power source is in a casing that is connected to the first circuit board.

14. The unit of claim 1 wherein the power source is one or more batteries.

15. The unit of claim 1 wherein the block housing includes a plurality of openings that extend from an outside surface of the block housing to the light source casing, wherein one opening aligns with the lens of the light source, and two of the openings are each configured to receive an adjustment device capable of moving the light source within the block housing.

16. The unit of claim 15 wherein each adjustment device is a set screw.

17. The unit of claim 15 wherein one of the adjustment devices moves the light source from side to side and the other adjustment device moves the light source up and down.

18. The unit of claim 1 that is configured to cause the light source to operate in each of the following modes: stay constantly on, stay constantly off, blink, or turn from the on position to the off position after a predetermined period of time.

19. The unit of claim 1 that includes one or more switches to change the mode of operation of the light source.

20. The unit of claim 19 wherein the one or more switches is on the first circuit board or the control device.