Starship Modeler Discussion Forums

Personally, I'd for a wall-wart (wall mounted, plug in transformer) Second best - Batteries other than 9v If the 8 LED's each draw 20ma (standard draw for most LEDs) then the power reserve/lifespan of batteries are as follows (assuming standard alkalines) 9v - 500ma - 3.1 hours AAA - 1000ma - 6.25 h...

Ok - the way to calculate the needed Ohms is R=(Vs-Vl)/a Ohms=(Source Voltage-Load Voltage)/Current Draw Example Source Voltage is 9 volts LED Voltage is 3 volts LED Current rating is 20ma (.02a) 9-3=6 6/.02=300 So to run a single LED rated at 3v off a 9v power source, you'd need a 300ohm resistor W...

So I get that if I connect batteries in series, they will add up in voltage (two 3 volt batteries will equal 6 volts). But what about in parallel. My understanding is that they will still equal the same voltage (assuming all batteries connected are the same) but that they will have more current or ...

A question: I've thinned my Aves Apoxie Paste with alcohol to get a speadable consistancy, but it takes forever to harden to a point I can sand it. Will heat cure it? Can I put it in the oven for a bit? Hold it over my space heater? And if the oven is acceptable, is there any danger because I thinn...

You want less expensive

Harbor Freight = $27

Or This One for $6

Yes, running the two LEDs in series with one 150ohm resistor will be fine

And since you're getting this all hooked up/assembled - I'll say it first




(grin)

The pair of 3mm LEDs with 1k resistors sounds like 1 resistor per LED All this will do is decrease the brightness by a percentage And I'm not surprised that you haven't seen a decrease in intensity in 6 months - LED lifespans are measured in years (100,000 hours of MTBF is 11 years at 24/7 operation...

Using the 150ohm vs the 1ohm will reduce the brightness - not by much if it's a "superbright"

Added benefit - since the LED isn't running at full brightness, it will actually extend the lifespan - no burnout

well, here's an amended question for the same subject..how do you set up a blinking circuit? Simplist Capacitor and two resistors feeding into a 555 timer This schematic yields This blinking By varying the values of R4, R5 and C2 you can vary the pattern The Diode (D1) is in there to give a less th...

The ones advertised as "Blinking" contain a micro-circuit in them to cause the blinking effect No need for additional parts - except AS ALWAYS, a resistor - use the same calcs for the blinky's as for standards One note - blinky LEDs have notoriously had a much shorter life than standards -...

Two words, John

Very Cool

"Super Clean" - Use to be known as "Castrol Super Clean" Very powerful de-greaser used to clean car engines and parts - any good auto-parts store should have it Warnings - this is caustic to skin, wear gloves, do not splash it on you Get a bucket or tub big enough to fit the piec...

Try either Jameco or Digikey

What you're looking for is "AWG 30, Wire wrap" - comes in several colors in 100' spools for $7 at Jameco

Also make sure you know the difference in the various Aves products My uses Aves Apoxie Sculpt - Useful for creating new bits and pieces and for major gap sealing - when mixed is about the consistency of other two-part fillers such as Milliput - about that of a very stiff clay It's what I used to tu...

Strip the Dull-coat off, get new decals (the decals will come off with the Dull-coat) After re-doing the decals, Gloss-coat with the same stuff you put under the decals - THEN dull-coat Thats just it - since I undercoated with Testors Gloss coat, and overcoated with Testors Dull Coat (cans #1281 an...

Strip the Dull-coat off, get new decals (the decals will come off with the Dull-coat)

After re-doing the decals, Gloss-coat with the same stuff you put under the decals - THEN dull-coat

Might want to post the pic someplace else and put a link here before John or Linda start getting testy

Links only in SSM, no inline pics

ok so after figuring out how many led's I need i came up with this number I need 51 led's total 48 white 5 mm 3.3 at 20ma 2 blue 5mm 3.1 at 20 ma 1 red 5mm 2.3 at 20 ma now I have a total 16 strings I will be running off of a 12 volt power supply my power supply will be a 2000ma one for each string...

wow thank you so much you taught me how to use and wire leds over night now I am sure I can wire up my own light kit and make it work with different switches the way I want it to lol now about what type of wires to use lol :( For all my wiring, I use Wire-Wrap - it's 30 gauge, solid, insulated - wi...

sweet I get it now I hope lol just need to make a really long power and ground wire lol. so my final question for you my friend is this. I promise that this is the last one :D Using 63 led I will have a total 21 strings all running off the power wire and conecting to the ground wire on the 12 volt ...

Yep Always check the calcs for the Resistor (Vs-Vd)/A For the 3 Whites, the calc is (12-(3.3+3.3+3.3))/.02 or (12-9.9)/.02 = 105 For the Blue-Blue-Red-Red (12-(3.1+3.1+2.3+2.3))/.02 or (12-10.8)/.02 = 60 For your strings of 2 Whites (12-(3.3+3.3))/.02 or (12-6.6)/.02 = 270 To calc the total ma neede...

Ok For one - Ian (Raytheon) is considered one of the guru's of ST Lighting - it's a good goal to shoot for, but even I'm not ready to challenge Ian in the lighting arena Two - got a basic schematic worked up http://i287.photobucket.com/albums/ll136/Starwind_Design/LEDs.jpg We can't post inline image...

≠♀§#&@(§ LOL ok here we go let me see how this works Ok 12 volt power supply i need to run at least 35 white leds for the windows in both the saucer and the secondary hull so on this strand i will go from the power supply to switch to a 105 Ohm resistor then to led then repe...

So I dont need to wire each led with a resistor then? So on one section All i need to do is to go from the power wire to a switchto the led negetive to positive to led to led so on and so until i have 30 of them together or how ever i need then add the resistor then to the ground? So i dont need a ...

ok kool thank you so much So one last question I can hook up all white led lets say for my windows add a switch and they will be able to be turned on and off. for my deflector and impulse crystal i go from the power wire that has all the other lights wired too to that with different switches. to th...

I was thinking of buying some 28-30 gauge beading wire. I like the size, you can find it nylon coated, and it's flexible and easy to wrap. But with my luck, I'm worried that it will cause the model to burst into flames. So anyone with any experience with this stuff? If I remember correctly, beading...

So my next question will be this I found a 12v 2000ma ac/dc regulated adapter but where do I get the part that i wire the lights too? I have no idea what it is called and I think I will need a least a 300 ohm resistor on each led. lol This is so confusing I think I almost got it but I am not sure I...

Ok I think I understand now but let me tell you what I am doing so that way you guys understand I am building a pl 1/350 refit and I want to light it. I need a total of 62 led's to do this. 58- 5mm white 20ma 3.3 vdc led's 2- 5mm red 20ma 2.3 vdc led's 2- 5mm blue 20ma 3.1 vdc led's I am looking fo...

Ok I get it thanks man but how many of those led's can I power off of a 9 volt battery 100? is there a exact number? Actually, it's not the Voltage, but the Current that matters 9 volt batteries are notorious for having low capacity - 120-1200maH (milli-amp hours) Basically - if you hook up 10 stan...

I hope this doesnt sound stupid but I have no experience wiring led's so here is my question? Can i wire a bunch of White 3.3vdc 8000 mcd 5mm led's say 30 of them mixed with a couple of blue and red ones. Each light will have a resistor of 200 Ohm . Can all of this work off of a single 9 volt batte...