Difference between revisions of "DR6"

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Under the hood there is quite a bit of circuitry given that this is a "dumb light" controlled externally by being flipped on and off. This is at the least a complex constant current supply with a fairly high power factor. Later models include compensation for continuous brightness after years of use and environmental monitoring and compensation features.
 
Under the hood there is quite a bit of circuitry given that this is a "dumb light" controlled externally by being flipped on and off. This is at the least a complex constant current supply with a fairly high power factor. Later models include compensation for continuous brightness after years of use and environmental monitoring and compensation features.
  
This particular DR6 Green Arrow did teh job of a single component, a light bulb, with a mere 106 discrete components, 44 of them being actual green LEDs, along with a PCB weather tight case and fasteners.
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This particular DR6 Green Arrow did teh job of a single component, a light bulb, with a mere 106 discrete components, 44 of them being actual green LEDs, along with a PCB weather tight case and fasteners. Green LED's are actually arannged as groups of 4 in parallel, wired 11 times in series.
  
 
*LM2903N Comparator, Dual, Low Offset Voltage
 
*LM2903N Comparator, Dual, Low Offset Voltage
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*TN2404KL 240V N Channel MOSFET
 
*TN2404KL 240V N Channel MOSFET
 
*X2 Capacitors, MOV, Zeners, Diode Bridge, Fuses
 
*X2 Capacitors, MOV, Zeners, Diode Bridge, Fuses
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'''Detailed images of PCB, aspect and skew corrected, 1:1 at 300 pixels per inch.'''
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[[File:PCB-DR6-GREEN-TOP.jpg|1000px]]
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[[File:PCB-DR6-GREEN-REV.jpg|1000px]]
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''* Note that image (bottom side of board) is mirrored horizontally''

Revision as of 06:50, 27 July 2017





🚥
GELcore aka GE Lighting aka current powered by GE model of traffic signal light designated DR6. This is documentation of units pulled from roughly a decade of active service.

G21202B.jpg

As of 2013 GE offers it's 14th version of it's LED based light bosting over 6,000,000 sold world-wide

These were previously developed to conform to NEMA TS-2-1992, or the second revision of teh "Traffic Control" standard "TS-1", "TS-2" has since been updated, and super-seeded.

Inside of dismantled green arrow unit https://photos.app.goo.gl/PPONnfMPILU6VcAV2

Under the hood there is quite a bit of circuitry given that this is a "dumb light" controlled externally by being flipped on and off. This is at the least a complex constant current supply with a fairly high power factor. Later models include compensation for continuous brightness after years of use and environmental monitoring and compensation features.

This particular DR6 Green Arrow did teh job of a single component, a light bulb, with a mere 106 discrete components, 44 of them being actual green LEDs, along with a PCB weather tight case and fasteners. Green LED's are actually arannged as groups of 4 in parallel, wired 11 times in series.


Detailed images of PCB, aspect and skew corrected, 1:1 at 300 pixels per inch.

PCB-DR6-GREEN-TOP.jpg

PCB-DR6-GREEN-REV.jpg

* Note that image (bottom side of board) is mirrored horizontally