Search found 52 matches

by RossW
Tue Aug 01, 2017 3:18 pm
Forum: Lighting & Electronics
Topic: Switching windows between 2 light colors
Replies: 2
Views: 259

Re: Switching windows between 2 light colors

R, G, B = 255, 255, 255 will give you white with a RGB LED.
by RossW
Thu Jun 08, 2017 3:22 pm
Forum: Wonderfest 2017
Topic: Contest Challenge
Replies: 65
Views: 5298

Re: Contest Challenge

746 total models entered, up around 200 from last year. Not quite 800, but still spectacular. Thanks to everyone who entered!
by RossW
Fri May 26, 2017 8:56 am
Forum: Wonderfest 2017
Topic: Contest Challenge
Replies: 65
Views: 5298

Re: Contest Challenge

With all these entries, is there a means of filling out entry forms beforehand? The last time I was there (a lifetime ago, admittedly), there were a lot of intricate notes on the forms regarding scratchbuild work, customizations, and so on. I figure if I can write up even part of the forms before I...
by RossW
Thu May 11, 2017 3:13 pm
Forum: Lighting & Electronics
Topic: Light defusing?
Replies: 23
Views: 3293

robiwon wrote:Get a bag of batting, the stuff used for stuffing pillows. Works great. That's what I used to diffuse the engine lights on my Salzo Galactica.

http://i67.tinypic.com/2l6gdg.jpg
That was going to be my suggestion as well.
by RossW
Thu May 11, 2017 3:11 pm
Forum: Wonderfest 2017
Topic: Things to bring
Replies: 35
Views: 1980

All great suggestions, although I think George is being a little wistful about the clothes thing (You were the belle of the ball back in '09 when you went clothing optional!). Don't waste your time or money with one of those Styrofoam coolers - over fill with ice & drinks and it will bust all over t...
by RossW
Tue Jan 17, 2017 1:47 pm
Forum: Wonderfest 2017
Topic: Past Gold Winners' photos...
Replies: 11
Views: 1552

Yes, I still have the slip. I always keep them. I can see messing up the name of the kit: "Phobos" for "Phubus" (and my handwriting ain't the greatest). But it's kind difficult to look at a form that says "Rich Dula" and get that named confused with "Kenneth Darden". I know, he and I always attend ...
by RossW
Tue Jan 17, 2017 10:36 am
Forum: Wonderfest 2017
Topic: Past Gold Winners' photos...
Replies: 11
Views: 1552

I think we've all had Dave Hodge screw up a model or builder's name. I've taken to pre-printing 3 copies of labels for each model that includes the model's name and description. It makes it easier for the judges (I think). Note to the WF team: It would be really nice to be able to pre-print entry f...
by RossW
Mon Jan 16, 2017 2:10 pm
Forum: Wonderfest 2017
Topic: Past Gold Winners' photos...
Replies: 11
Views: 1552

Lonewolf - do you still have the yellow form for the entry? What should the slide at the ceremony (and the website) have said for:

Modeller's Name=?

Model=?
by RossW
Tue Jun 14, 2016 2:55 pm
Forum: Lighting & Electronics
Topic: Automated lighting demo talks from Wonderfest
Replies: 3
Views: 1360

Re: Automated lighting demo talks from Wonderfest

This links to two Wonderfest presentations on using microprocessors for lighting control. The first, from 2013, deals with the use of "PIC" processors, and the one from this year shows the use of Arduino boards. I have forgotten the name of the speaker, and I do not see it on his materials. Hi dave...
by RossW
Wed Aug 19, 2015 3:11 pm
Forum: Lighting & Electronics
Topic: Something I've been noticing from our Japanese brethren
Replies: 9
Views: 5068

A diode will typically drop about 1V so the modeller might be using it to make the LEDs not so bright. Not sure about surge protection, though.
by RossW
Fri Jul 17, 2015 3:40 pm
Forum: Lighting & Electronics
Topic: LighthouseLEDs.com and Reversed Polarity of Leads
Replies: 2
Views: 1862

LighthouseLEDs.com and Reversed Polarity of Leads

Bought a bunch of coloured 2mm LEDs from lighthouseleds.com a while back and after soldering some into a custom PCB I found some that wouldn't light. I thought maybe I might've over-voltaged them by accident, or got a few bad'uns, but when I desoldered and tested them I found the leads were reversed...
by RossW
Tue Apr 07, 2015 2:02 pm
Forum: Lighting & Electronics
Topic: Microcontroller Projects
Replies: 50
Views: 39662

There has been a fair amount of activity over on SFMA re: Arduinos, so much so that Boyd created a new forum for it:

http://scifimodelaction.com/sfmaforum/i ... board=23.0

There's sample code to blink both running lights & strobe lights with one board.
by RossW
Tue Mar 04, 2014 1:56 pm
Forum: Lighting & Electronics
Topic: Led strips
Replies: 5
Views: 2482

I use a cool tip glue gun to hold down LED strips. Others use crazy glue shot with a light mist of accelerant.
by RossW
Mon Jan 13, 2014 12:56 pm
Forum: Construction
Topic: Making Clear Windows
Replies: 52
Views: 36031

You can't do a big batch ten apply it. It is a pain in the ass. You need to tape the outside of the window it cover the window. Fill the hole with the powder, you will need slightly more then just flush with the plastic. Then a few drops of the liquid, just enough to melt the powder Thanks chiver. ...
by RossW
Sun Jan 12, 2014 7:00 pm
Forum: Construction
Topic: Making Clear Windows
Replies: 52
Views: 36031

Picked up a set of clear acrylic powder and liquid today and tried it out. I don't think it's join to work for me because, (a) the stuff stinks worse than lacquer paint/thinner and I'm not even sure how I'm typing this right now, (2) it sets up REALLY quick, so you can't really make a big batch to d...
by RossW
Fri Jan 10, 2014 8:17 pm
Forum: Construction
Topic: Making Clear Windows
Replies: 52
Views: 36031

I just got back from Sally's, the beauty supply store... got some of those really cool long lashes... Not Really. I did pick up some powdered acrylic. This stuff is neat, you add the emulsifier, and you can mix the powder in as thick as you like, but I just followed the directions and got a nice th...
by RossW
Thu Sep 26, 2013 4:17 pm
Forum: Lighting & Electronics
Topic: Adding potentiometer to lighting kit motors
Replies: 6
Views: 2784

AFAIK, pots are not recommended for adjusting DC motor speeds. You're better off using PWM from an Arduino/PIC but I realize that is more difficult and costs money. There might be some pre-built motor controllers available, though. http://www.electro-tech-online.com/threads/help-i-cant-get-my-potent...
by RossW
Fri Sep 20, 2013 4:01 pm
Forum: Lighting & Electronics
Topic: Question from a lighting novice on the TOS lighting kit
Replies: 7
Views: 2477

I don't think it matters which leg the resistor is soldered to - it should work the same if on the long (+ve) or short (-ve) leg of the LED. For the PL lighting kit, I think the light tape runs at 12V but the other lights run off the zener diode voltage splitter. Each white connector has a different...
by RossW
Tue Sep 17, 2013 3:27 pm
Forum: Lighting & Electronics
Topic: Voltage regulator What to buy and where
Replies: 2
Views: 1418

You need to use a 7809 voltage regulator. The basic setup is the 7809 with filtering caps on either side (input/output) but this link as 2 caps on the output: http://www.electronics-tutorials.ws/blog/variable-voltage-power-supply.html just google '9v voltage regulator' and see what you need. All com...
by RossW
Wed Jul 10, 2013 3:31 pm
Forum: Lighting & Electronics
Topic: Diffusing light (refit nacelles)
Replies: 3
Views: 1732

Go to a fabric store and get a bag of white polyester stuffing. I know others have used that to diffuse the light in the Refit nacelles.
by RossW
Thu Jun 13, 2013 1:12 pm
Forum: Lighting & Electronics
Topic: Small geared moters for spinning bussard blades?
Replies: 6
Views: 2816

The PL kit motors are specific to this kit and don't have any useful markings. One of the motor has "092812" written on it but that doesn't tell you anything.

I'm using Sayama motors that are very similar but have metal shafts and are generally better quality. Their model # is 12SM-AT3.
by RossW
Tue Apr 30, 2013 1:20 pm
Forum: Lighting & Electronics
Topic: slow fadeing leds
Replies: 11
Views: 3407

intresting though, when in parallel it come to life like normal but fades out slow when hooked up to a 5 volt wall wart I think if you want to do a hardware solution for fade in and out, it's going to get tricky. I've seen some attempts on the 'net but haven't been able to reproduce them to my sati...
by RossW
Thu Apr 25, 2013 3:20 pm
Forum: Lighting & Electronics
Topic: slow fadeing leds
Replies: 11
Views: 3407

You can try putting a capacitor in parallel with the LED but you may only get a fade in. I looked into this a while back (I wanted a hardware solution as opposed to using PWM via a microcontroller) and found some info by googling ' fade in LED'.
by RossW
Thu Jan 31, 2013 8:09 pm
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710

Zener Diode Voltage Regulation?

Anybody ever user Zener diodes? That's apparently what PL uses on their TOS E 1/350 lighting kit.

http://www.starshipmodeler.net/talk/vie ... 73&start=0
by RossW
Thu Jan 31, 2013 7:21 pm
Forum: Lighting & Electronics
Topic: PL TOS E 1/350 Lighting Kit - Voltage Weirdness
Replies: 0
Views: 1774

PL TOS E 1/350 Lighting Kit - Voltage Weirdness

I've done some quick-and-dirty voltage measurements on the saucer board that comes with the Polar Lights TOS E 1/350 lighting kit, and I can't quite work out what's going on. Normally, if you have a 12V power supply you'd need some kind of voltage regulator (e.g. 7805) to drop the voltage for the PI...
by RossW
Mon Jan 21, 2013 4:50 pm
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710

In particular part #445-3602-1-ND's datasheet ([/img] http://www.delevan.com/seriesPDFs/SPD125.pdf ) makes the part look just like the one in this EEEvilBae DC-DC power converter: http://www.ebay.com/itm/LED-Voltage-and-current-display-LM2596-DC-DC-Step-Down-CC-CV-Adjust-Power-Supply-/150878659741?p...
by RossW
Mon Jan 21, 2013 4:06 pm
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710

Bernie - this is a full list of 330uH inductors (axial lead) at DigiKey. There aren't that many, but with many different specs. Do any of them look like they'd match the ones you get from the UK? Don't see any list RossW :? :) Actually, going from your original 58mA @ 5v output requirement, you don...
by RossW
Mon Jan 21, 2013 10:31 am
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710

No, I'm in Canada but have had good luck with ordering from UK. I'll try DigiKey.ca and Mouser. No luck at either of those suppliers. I've gone over the LM2575's datasheet but the recommended inductors aren't available at DigiKey, Mouser or Jameco. And if I can find the right inductance (e.g. 330 u...
by RossW
Fri Jan 18, 2013 3:09 pm
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710

No, I'm in Canada but have had good luck with ordering from UK.

I'll try DigiKey.ca and Mouser.
by RossW
Fri Jan 18, 2013 2:47 pm
Forum: Lighting & Electronics
Topic: Voltage regulator question
Replies: 32
Views: 9710