how to drive tu-halogen bulbs

[4tuty]

can any one give me a circuit for tungsten halogen bulb driver, i am planning to use replacement bulb this from oceanoptics it cost around $200 but the complete package is around $1000.


I have 12 V adapter, fan and components, I need constant light intensity from the light source

 

[BradtheRad]

No doubt you looked into the wide range of pricing for halogen bulbs, including less expensive types such as automotive headlamps?

Whatever type you use, I imagine you wish to get a long life of use from it. The goal is to apply sufficient power so that the filament reaches a high temperature. Then the tungsten metal goes through its proper cycle being vaporized and re-deposited.

Discussed in this thread regarding a suitable method to adjust brightness of a halogen bulb.

https://www.edaboard.com/threads/halogen-lamp-limit-resistor.385899/

 

[FvM]

If I understand right, the tungsten halogen light sources from OceanOptics come with a power supply. I guess they are constant DC voltage sources with current limiting. Most scientific instruments utilizing incandescent lamps that I know are working well with constant voltage supply.

Not very common, but it would be possible to control the lamp with light sensor feedback at a slightly reduced constant intensity.

 

[4tuty]

If I understand right, the tungsten halogen light sources from OceanOptics come with a power supply. I guess they are constant DC voltage sources with current limiting. Most scientific instruments utilizing incandescent lamps that I know are working well with constant voltage supply.

Not very common, but it would be possible to control the lamp with light sensor feedback at a slightly reduced constant intensity.

This is the circuit they have inside their light source it is drived using 12 V DC adapter

 

[FvM]

As seen from the photo, the light source uses a 5V/2A switching regulator internally. It's an obsoleted Texas Instruments/PowerTrends point-of-load module. The voltage can be apparently fine adjusted by a potentiometer from the rear side. The product manual should tell about the details. You may want to measure the actual lamp voltage with a multimeter.