DR6: Difference between revisions
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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. | 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. | |||
 | |||
[[File: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 | As of 2013 GE offers it's 14th version of it's LED based light bosting over 6,000,000 sold world-wide | ||
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Inside of dismantled green arrow unit https://photos.app.goo.gl/PPONnfMPILU6VcAV2 | 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. | |||
Partially reconstructed Copper tracers. | |||
[[File:PCB-DR6-GREEN-CU.png]] | |||
*LM2903N Comparator, Dual, Low Offset Voltage | |||
**http://www.onsemi.com/pub/Collateral/LM393-D.PDF | |||
*MC34262 Power Factor Controller | |||
**http://www.onsemi.com/pub/Collateral/MC34262-D.PDF | |||
*STP5NK80Z N-channel 800V 1.9Ω 4.3A TO-220 Zener-protected SuperMESH™ Power MOSFET | |||
**http://www.st.com/content/ccc/resource/technical/document/datasheet/ec/19/e1/cc/25/c2/4c/18/CD00003038.pdf/files/CD00003038.pdf/jcr:content/translations/en.CD00003038.pdf | |||
*MPSA42 High Voltage NPN Transistor | |||
**https://www.onsemi.com/pub/Collateral/MPSA42-D.PDF | |||
*TN2404KL 240V N Channel MOSFET | |||
*X2 Capacitors, MOV, Zeners, Diode Bridge, Fuses | |||
'''Detailed images of PCB, aspect and skew corrected, 1:1 at 300 pixels per inch.''' | |||
[[File:PCB-DR6-GREEN-TOP.jpg|1000px]] | |||
[[File:PCB-DR6-GREEN-REV.jpg|1000px]] | |||
''* Note that image (bottom side of board) is mirrored horizontally'' | |||
Latest revision as of 07:04, 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.
As of 2013 GE offers it's 14th version of it's LED based light bosting over 6,000,000 sold world-wide
- http://www.gelighting.com/LightingWeb/na/images/traf192-ge-gtx-led-signals-120v-datasheet_tcm201-54219.pdf
- http://www.gelighting.com/LightingWeb/na/images/traf064-ge-gt1-arrow-signals-incandescent-look-led-datasheet_tcm201-54217.pdf
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.
Partially reconstructed Copper tracers.
- LM2903N Comparator, Dual, Low Offset Voltage
- MC34262 Power Factor Controller
- STP5NK80Z N-channel 800V 1.9Ω 4.3A TO-220 Zener-protected SuperMESH™ Power MOSFET
- MPSA42 High Voltage NPN Transistor
- TN2404KL 240V N Channel MOSFET
- X2 Capacitors, MOV, Zeners, Diode Bridge, Fuses
Detailed images of PCB, aspect and skew corrected, 1:1 at 300 pixels per inch.
* Note that image (bottom side of board) is mirrored horizontally