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#1
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![]() It ain't purdy, but it works
![]() Pretty cool seeing it rotate thorough the flash patterns I programmed though... using a 9v battery! Now to figure out how to crank out 2000 lumens, for something that'll aproach a strobe. ![]() Last edited by ZG4Me : 03-15-2007 at 01:06 AM. |
#2
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![]() Quote:
Also worth noting... I seem to recall other builders having problems getting their DAR to sign off on lighting that does not conform to the standards required for certified aircraft despite the inability to point to any such requirements for experimental category craft. (Was this the same guy that had a DAR require some sort of indicator telling if the pitot heat was heating?)
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Daniel Dillon Cozy Mark IV #1353 builder (weekends); Semiconductor Field Applications Enginer (weekdays). Current status as of April '07: *Chapter 4, 5 - completed *Chapter 6 - in progres, fuselage assembled without a bottom, step 1 completed. Continuing to make progress every weekend. |
#3
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![]() Quote:
![]() Seriously, I think you edjumacated types call it proof of concept. Position lights can be done (those red/green things at the end of the wings); cheap, light (pun intended), small, and pretty inexpensive (for experimental builders); but there's still some minor issues. If I make it to RR (probably), I'll bring all this Frankenstein stuff along for every one to poke at. Quote:
I think the biggest thing is, they don't have a clue. If the builder could easily prove the lights meet FAR, no problem (duh). That might entail ready access to a light meter of some sort. Once approved, it should be easy to cite other builders. Right. Bwa HAHAHA ![]() But what do I know, I'm still chapter 1 ![]() Rick |
#4
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![]() Oh, I was just curious if they were Lumileds, Osram, Nichia, or whatever. You mentioned some flash patterns, and I was just wondering if you used a little timer chip, or some other kind of gizmo franken-wired into the LEDs to flash in various patterns.
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Daniel Dillon Cozy Mark IV #1353 builder (weekends); Semiconductor Field Applications Enginer (weekdays). Current status as of April '07: *Chapter 4, 5 - completed *Chapter 6 - in progres, fuselage assembled without a bottom, step 1 completed. Continuing to make progress every weekend. |
#5
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#6
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![]() The saga yall are referring to is Matt Bunch's run-in with getting his Cozy III op limits to include night VFR. The discussions were on the Cozy email. You can find the emails with the search engine.
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============= Wayne Hicks, Cozy Plans #678 http://www.maddyhome.com/canardpages...cks/index.html |
#7
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The discrete's include a PIC MCU, which holds the programmed sequences, soft off, on, sleep. Right, left, pause. R R pause L L RL RL pause RR Center Center LL pause ... |
#8
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I still haven't played with PIC microcontrollers yet. The little bit of micro experience that I have involves things a lot less simple, and my feeble little memory couldn't cobble together any functionality out them anymore without some restudy. The PICs are supposed to be cheap and simple from everything I hear and see. There are a lot of months in the calendar that need to go by before I start looking at electrical and lighting and such, but I have been thinking about my lighting requirements (desires) since before I even bought plans. That is why your post (with photos ![]() So just a 9V battery, a PIC, and the LEDs. Hmmm... no other driver to keep the LEDs happy?
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Daniel Dillon Cozy Mark IV #1353 builder (weekends); Semiconductor Field Applications Enginer (weekdays). Current status as of April '07: *Chapter 4, 5 - completed *Chapter 6 - in progres, fuselage assembled without a bottom, step 1 completed. Continuing to make progress every weekend. |
#9
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![]() Quote:
![]() I got lucky, Newark shipped me three after a two week wait. MCU runs 2.5-5v, so needs a regulator. LED's are current driven, so dropping resistors work (for now) MCU has 25mw sink/source so MOSFET on the output. There's some spiffy SOT current regulating devices on the horizon, capable of PWM and TTL/CMOS control. Lots of cool features about the PIC's, most any pin can be configured as in *or* out. Depending on the device, a whole slew of options (ADC, multiple timers, ...). But I'm probably preaching to the choir ![]() I was thinking on paractical applications. Read: simple for me. Dimmable LED lights (panel, passenger compartment). Strobe driver(s). Ring of purple LED's on the belly ![]() The gear down / speed / landing brake logic. Canopy latch. Add in a differential pressure gauge for backup ASI. Could even interface w/ thermocouples, capacitance probes, tension/weight transducers, ... Add a voice module like John Slade has: "John, the gear is down. John, did you ballast for no passenger?"... Rick |
#10
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![]() Quote:
Ring of purple LEDs on the belly? Don't you motorcycle types call guys who do that squids? It sounds pretty cool. I need to get a PIC eval board or kit and mess with them. Just like you I have a few ideas for electronics gizmos. It is likely that once my plane is flying, then the fun begins as I turn the thing into a test bed for electronics gizmos. Just like you, I have my list of wants.
But, more important than any of those is finishing the structure, then the control systems, and bolting on an engine, and getting the thing to leave the ground. Once I am flying, I can install a matrix of little white LEDs driven from the USB of a laptop so that I can get paid to do aerial advertising like the Goodyear Airship does. ![]()
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Daniel Dillon Cozy Mark IV #1353 builder (weekends); Semiconductor Field Applications Enginer (weekdays). Current status as of April '07: *Chapter 4, 5 - completed *Chapter 6 - in progres, fuselage assembled without a bottom, step 1 completed. Continuing to make progress every weekend. |
#11
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![]() Hi guys,
have either of you looked into the hi output LEDs (5-10W) that are becoming available for this application? Additionally, what about any leads onto making an affordable LED strobe? Im sure there are plenty on the forum that would benefit from your contribution to DIY designs. Cheers, Bruce. |
#12
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![]() Problem (as I read FAR) is a strobe needs to put out 400 lumens (candelas?) average over the duration of 40-100 flashes per minute (FAR 23.1401). Figuring a .1 second flash, the light would need to be a 4000 candelas (lumens?) unit. About 10 of the Super-Hi-watt LED's. Each side. If someone didn't mind a high $$ strobe, it could be done w/ today's tech. Yes, am thinking on it. May have some sort of hi-watt demo Frankenstein board(s) ready for RR. Position lights (the red/green things on the wing tips) are pretty easy/cheap right now. One/two LED's per side would do it. 100,000 hour life too. DDillon: Microchip makes a PicKit-II that'll fit your demo board bill, about $50. USB, and it comes with mplab IDE. Rick |
#13
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![]() I guess you knew I would be reading eh? Thanks
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Daniel Dillon Cozy Mark IV #1353 builder (weekends); Semiconductor Field Applications Enginer (weekdays). Current status as of April '07: *Chapter 4, 5 - completed *Chapter 6 - in progres, fuselage assembled without a bottom, step 1 completed. Continuing to make progress every weekend. |
#14
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![]() Spring time in the Rockies, need to git the 'scoot' all fixed up. Mans' got to have his priorities
![]() The MPlab IDE is pretty cool. For all but the most robust apps, it'll do it all. Compile, assemble, link... The PICKit-II is about all you'll need to fiddle. BTW, squid = LED lights on the belly, only seen when the front wheel is airborne. Since the ZG is a shaftie, and we all know that shafties can't wheelie... Shriner = LED lights on a "Parade Bike" ![]() Rick |
#15
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![]() Quote:
Rick |
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