Starship Modeler Discussion Forums

Glad to help! BTW, I see you are using a 6v supply, so you might want to change the value of R11 from 560 to 220 ohms and change R12 from 470 to 120 ohms as the original values were for a 12v supply. This is what the circuit looks like transposed onto an etched pcb (and filmed in the dark!!): http:/...

@ Millennium Falsehood I've just breadboarded the circuit again and I can confirm that this version: http://modelslouch.wordpress.com/2012/02/21/556-based-photon-torpedo-circuit/ will work just fine :D . There are a couple of values that are different from that original circuit, but its mainly the s...

Hi MF Sorry I didn't see your posting earlier! Thats my circuit you've used there. I actually revamped this circuit just after the one you saw (see here for the newer one: http://modelslouch.wordpress.com/2010/11/03/finally-final-photon-torpedo-circuit/ . R3 and R4 are misplaced on the circuit you'v...

Hi Meterman - yes it does. If you have a look on my blog (see sig), I've posted a video so you can judge the sound quality! If anyone is interested in these boards, it might be best to pm me, as I don't want to infringe any of the forum rules about advertising :oops: I'll post an announcement when m...

OK, cheers Shizman - PM sent.

Hi Shizman Sorry for the delay in getting back, trans-Atlantic time slip an' all that! I've posted a pic of the bare pcb on my blog (see the sig below). I've just got to assemble one so as to confirm that all is well and then I can send you one. Would you want just the bare board (it would have to i...

Hi Guys

Just a bit of self publicity , but I've now had a batch of pcbs manufactured commercially, so I can soon offer a complete circuit board to control the plaque.

Bernie

True 'nuff

For multiple led driving, you could consider using a led matrix driver like a MAX7219 - they can be a bit pricey but Maxim will supply samples for free. Have a look on the Arduino site for matrix controllers, you'll see what I mean. Have you thought about building the ATMega as a standalone rather t...

Gettin' there. Got the pcb etched, just down to soldering the components on and check it all still works! By the way, if anyone else intends laser printing pcb designs onto a transfer medium, don't use a Brother laser printer - it don't work! I think they must use some form of different toner to HP,...

Sure - no problems. I'll keep everyone informed of progress here and on my blog.

Just finished the coding 100% now.

I've just come across this thread, and coincidentally, I've just created one of these displays, also using an Arduino and a MAX7219 led matrix . I was asked by a friend, who supplied me with one of Matt's (Laserfire Creations) display plaques, to see if I could come up with something. It works in mu...

Well done Kila!

Glad you only killed one 555!

I've had (still have) more than my fair share of the appearance of "magic smoke!!" .

Hope all goes well with the rest of your DS9 build.

Only just noticed your post Kila.

You could try the second circuit in the link that brt posted (ie the one for duty cycles less than 50%) with values of:
R1 = 2.4K
R2=33K
C1=47uFd

That'll give you 0.078s on and 1.07s off (0.867Hz) if thats close enough to what you want?

Hi MF,

Try this link:

http://freespace.virgin.net/matt.waite/ ... nouts/555/

It should allow you to input values and hence calculate frequencies, timings etc.

Bernie

Hi Boonblade

Will you need boards etched as well, or are you intending the circuits to be mounted on vero? What sort of time scale are you lookin at?

Hi Guys As an aside to the previous mention of Liquitex, I contacted Herman Reich at Liquitex and he has confirmed that the mica chips in their iridescent Medium are fine enough to go through an airbrush, even a fine point, when thinned with the airbrush medium. Seems there's quite a few places stoc...

I understand that the new version is perfumed. Hehe, you're right there. I may not end up with the most accurate refit model, but its sure going to smell nice! ASDA and Wilkinsons for a start. Klear is at the old price, about a quid cheaper than the new version. I don't have an Asda near to me unfo...

Thanks for the recommendations guys :tu: . I'll do some searching for Liquitex and Createx and see what I can find. Maybe one of the additives in a medium if its fine enough, as I do intend airbrushing it. I was wondering what the Vallejo metallic medium was like, but I'll soon find out as I've got ...

@ seam-filler Thanks for that link :thumbsup: I'm fairly stocked up on paint at the moment, but when the big E build begins - well, there's a different tale! @ ajmadison #-o Ah - I thought I knew which version I was going to build - now I'm not so sure :? Cheers for the info Still, the question rema...

Guys Hope someone can help. I need some advice regarding which method is best (for best, read simplest!) to produce the most accurate (or visually pleasing) aztec effect on the Polar Lights 1:350 Refit Enterprise. You see, I have the later kit version that comes with the aztec decals, but do they pr...