Introduction: (written 5-26-2007)

This circuit is designed to be used with my rechargeable 12.5V outdoor Power Pack, and the Tent Light's Power Distribution Box is designed to act as a power hub, providing access points (DC power jacks) for other devices to connect to the 12.5V power buss.

*I customized a SONY stereo power supply to receive external DC from my Power Pack (or any other 11-40VDC source).  See my 9VDC Supply for SONY Stereo.


Tent Light - Halogen Bulb & LEDs

Devin R Ott
Design - May 2006
Final Assembly - May 2006


Description:

Tent Light employs 6V halogen bulb and multicolor LED array, mounted together in a Light Fixture.  The Light Fixture mounts to the inside roof of my 10'x10' tent, and is controlled by a hand-held Wired Remote conveniently accessible from nearly any location in the tent.

 

Tent Light has two modes of operation: Bulb or LED

Bulb mode:  halogen bulb brightness is adjusted by the bulb brightness potentiometer. 

LED mode:  LED brightness is adjusted by three potentiometers (one for each color: red, green, blue).

 

Wired remote: low-power design ― 24AWG, 9-conductor cable interface.

Uses low-current logic signals to trigger high-current relays in Light Fixture

Uses potentiometer reference voltages to control high-current supply voltages in Light Fixture

 

Power Distribution Box: establishes main power buss with access points (DC power jacks) for additional devices to receive power.

 

Requires 12VDC @ 1A max

 


User Operation

Power Distribution Switch ― DPST ― connects main power buss to external 12VDC supply.

 

Tent Light Power/Function Switch ― DPDT (center OFF) ― located on Wired Remote.

ON-Bulb:   turns ON halogen bulb ― triggers relay#2 and sends power to OPA4277 op-amp buffer circuit. 

OFF:        OFF

ON-LEDs:  turns ON LEDs (R,G,B) ― triggers relay#1 and sends power to OPA4277 op-amp buffer circuit.

 

Bulb Brightness ― 5kΩ POT ― controls supply voltage of HPR50 halogen bulb.

*Bulb circuit is designed to have a minimum brightness limit.  Bulb can not be dimmed beyond this minimum brightness.

 

Red LED Brightness ― 10kΩ POT ― controls supply voltage of 810JPF4D red LED array.

Green LED Brightness ― 10kΩ POT ― controls supply voltage of 500TG4DF Green LED array.

Blue LED Brightness ― 10kΩ POT ― controls supply voltage of 500TB4DF Blue LED array.

*LEDs in the Tent Light can be dimmed all the way down to their non-conducting (OFF) state so that any combination of the three colors can be achieved.

 


Tent Light Wiring Diagram 

 

 

 

 

Final Assembly: Tent Light  *click image for medium size, click hyperlink for large size (where available)

 

Complete Tent Light

    (Large)

 

Power Distribution Box

(Large)

 


Wired Remote:

Circuit Operation:

***coming soon***



Final Assembly: Wired Remote  *click image for medium size, click hyperlink for large size (where available)

 

  (Large (Large)

 


Light Fixture:

Circuit Operation:

***coming soon***


Final Assembly: Light Fixture  *click image for medium size, click hyperlink for large size (where available)

 

Fixture

 

Adjustable Voltage Supplies for LEDs & Bulb   

(Large (Large (Large

 

LED Array

(Large(Large    

 

 


LED Array: schematics

 

 

 

 

 

 


All Photos:

 

Final Assembly: Tent Light  *click image for medium size, click hyperlink for large size (where available)

 

Complete Tent Light

    (Large)

 

Power Distribution Box

(Large)

 

Wired Remote 

  (Large (Large)

 

Fixture

 

Adjustable Voltage Supplies for LEDs & Bulb   

(Large (Large (Large

 

LED Array

(Large(Large    

 

 




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2007, Devin R Ott