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I'm a terrain builder (for tabletop games, see Warhammer

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I'm a terrain builder (for tabletop games, see Warhammer 40k, Infinity, etc.), and need an electronics hobby experts advice.

This is a model I'm building, and I want to create a flickering LED for one of the shopsigns. Please note that I'm a horrible electronics noob.

I've been looking through the kits that are offered in model railway Shops. But. I need my models to be mobile, so battery only. Electronic shops staff are usually frustratingly clueless.

Does anybody know a device like a circuit kit I could use, or an online place where I could ask some real electronics pros, who are used to build crazy stuff.

I feel like electronics has big potential for, I even have a soldering iron, but I need some starting help.
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>>1221894
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>>1221894
Not really sure what you need other than some kind of time delay relay or something like that wired in series, but ill bump for more pictures of your models.
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>>1221894
There are a few circuits that can do that, or you could just bodge up a small micro controller. VB Stamp, PI, or such.

Of course, you could buy one of those LED candles and rip the guts out.
Like this https://www.youtube.com/watch?v=4BPJwNx4bvc
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>>1221894
Depends what your want. Flashing on and off you can do with a few small parts, 555 timer is the go to or an astable vibrator from a couple transistors and caps.
Anything with a random on off you are better with a small microcontroller, nothing fancy an 8 pin will flash a light, the difficult or expensive part is the programmer and writing software for it if you haven't before.
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>>1221894
Onlything I can think of would be a nitinol wire switch that opens the circuit with use and closes it when it cools.
You're gonna need some copper wire, nitinol wire, electrical tape, and a 9v connector.
Any other mechanism that I can think of would either be noisy or require ametuer electronics above my skillset.
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>>1221894
Hack open a battery powered candle and pat yourself on the back.
>>
This?
https://electronics.stackexchange.com/questions/102928/smallest-simplest-possible-randomly-flashing-2-3-led-circuit
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>>1221894
I can't offer advice but I just wanted to tell you your hobby is cool and to keep at it
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>>1221894

Post more pics of this street please, looks like something out of original Blade Ruiner
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>>1222656
Came here to say this.
I had to do something similar for a Halloween costume once, worked swimmingly.
As long as your sign isn't going to suck down a bunch of power compared to the little tea-light bulb it should work.
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>>1222660
This. Miniature Hong kong makes me wet. Post how you made them as well
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>>1222656
yep, this. I used some to make beacon fires for fantasy games, worked pretty well
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>>1221894
Just get a set of cheap fake LED tea lights for a few dollars and disassemble them, you can make more than one flickering LED bulb that way.

You can easily repower them from some AA batteries or just use the existing coin cells.
>>
Candle light is the easiest way of doing it, but I recommend looking into Arduinos. They cost about $2 for a Nano on Aliexpress and you can do just about anything and tweak it to your liking through code. The electronics knowledge needed to use one is also very low. They use very low amounts of power to run, and can also act as a power supply for small things like a few LEDs.
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>>1222656
This. Did exactly this for a light saber crystal chamber. You can easily swap out the LEDs for different colors too.
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>>1221894
Buy a couple attinys, those can go a long way in your work
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If you wanna build somthing you can use an LM555 timer and a single LED hooked up to a 9V battery, but candle would be simpler
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>>1221894
just occured to me that C=10uF might be better but whatever, experiment, have fun :)

you will also need the datasheet for the 4093 cmos nand gate IC, which will give you the pinout. easy to google.
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>>1223131
so just to clarify
C=10uF
R1=100k
R2=2K2

varying these values by up to +/- 80% will not damage the components and may be required to get the circuit working how you want.
>>
I am actually pretty new do this stuff myself, but that might even give you a boost of confidence. Using an LED-Strip with WS2801 ICs and an Elegoo UNO (pretty much the same as an original Arduino UNO) I managed to get the LEDs blinking randomly in different shades of orange and red.
This is the sketch I used:

#include <SPI.h>

void setup() {
// Starting SPI
SPI.begin();
// Using the noise of unconnected analog pin 0 to generate pseudo random numbers
randomSeed(analogRead(0));
}

// function used to send color information to the WS2801 via SPI
// using default settings (CLK (CI) on Pin 13 and MOSI (DI) on Pin 11)
void color(int red, int blue, int green){
byte r = 0x00;
r += red;
SPI.transfer(r);

byte b = 0x00;
b += blue;
SPI.transfer(b);

byte g = 0x00;
g += green;
SPI.transfer(g);
}

void loop() {
// generating "random" red "color values" for the 3 LEDs of the strip
int i = 16*random(16);
int j = 16*random(16);
int k = 16*random(16);
// generating "random" green "color values" resulting in different shades of orange to red
int l = i/random(8,16);
int m = j/random(8,16);
int n = k/random(8,16);
// sending color values to first LED
color(i,0,l);
// sending color values to second LED
farbe(j,0,m);
// sending color values to third LED
farbe(k,0,n);
// "random" delay for "random" flickering
delay(random(50,150));
}

In order to minimize the whole thing one could use the "Enhancement V2 Pro Mini", which also uses an Atmega328P. Sketch has to be uploaded differently tho (for example via SPI using a Raspberry Pi with AVRDude).

Here are links that might help:
http://a.co/iPBkXVM (WS2801 LED Strip)
http://a.co/etI0Kjy (Elegoo UNO)
http://www.tinyosshop.com/index.php?route=product/product&product_id=275 (Enhancement V2 Mini)
https://learn.adafruit.com/program-an-avr-or-arduino-using-raspberry-pi-gpio-pins/configuration (uploading sketches using AVRDude and a RPi)
http://forum.arduino.cc/index.php?topic=300426.0
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>>1221894
last link is for the pinout of the V2 Mini Pro
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>>1221894
the orange clips are from the logic analyzer
>>
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>>1221894
this is how i connected th V2 Mini Pro to my RPi 3

At last, using flickering LED candles, as suggested multiple times, is probably the easiest and cheapest way to tackle your problem...
>>
>>1223765
>This is the sketch I used:

Thanks. Added to my sketchbook.
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>>1223775
Appreciate it! Although, there are two mistakes in the sketch i just noted uploading it to my V2 Mini Pro:
the function called for the SPI transfer to 2nd and 3rd LED should of course be color(r,b,g) not farbe(r,b,g)... yes i'm german...

everythings running fine with my V2 Mini Pro (1 Cent in comparisson).
>>
>>1223765
>paying premium for chinks to change the name on your Arduino knockoffs
Uno costs ~$3
Pro Mini 328 costs ~$1.50
Buy your shit on Aliexpress
>>
>>1223804
I actually bought the Elegoo through Amazon Prime as I needed it within one day and not weeks...
Next Arduinos I'm buying will be genuine ones anyways in order to support the development
>>
POST MORE MINI-TOKYO GOD DAMNIT
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>>1223906
yeah, this, with added politeness.
https://www.youtube.com/watch?v=aiLk9tlE-h8
- its, like, intersting.
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>>1221894

MORE MINI TOKYO
>>
>needing an entire fucking arduino board for one single flickering light

jesus christ fucking americans
>>
>>1223942
BUT >>1221894 IS HONG KONG OR TAIPEI
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>>1223966
""""""Making"""""" has less to do with production than consumption.
It's a sad, sad, sad, sad, sad, sad world.
>>
small electric fan in front of the light to create a flicker effect
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>>1223996
You're straight-up "haha Mr. Carpenter did you forge your own saw? Thought not! I bet you didn't even hand-mine the ore that was refined into those nails!" useless autism. Op makes dollhouses, not microcontrollers, let him spend all his practice time on his awesome dollhouses rather that learning, and being worse at, both.
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>>1224022
I said Making™, not arts and crafts. Do you notice the distinction?
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>>1224026
I notice you two-fisting fidget spinners while you type with your feet. Now go away and don't come back until you're posting from your own TempleOS competitor running on something you soldered together from discrete logic tubes you glassblew yourself, you special snowflake you.
>>
>>1223966
>always complaining about americans

jesus christ fucking mexicans
>>
>>1223966
>making it with an arduino is easier and faster than building a circuit specifically for the purpose
>it's not much more expensive than a custom circuit
>allows easy alterations and iteration without even soldering and can be expanded to control other things as needed
Arduinos are great for plebs, like me
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>>1224200

AVRs and microcontrollers are fine for a multitude of applications. The little insecure nerd boys who hate on them are just fearful that a normal person might appear to understand the elite arts that the little nerd boys have spent a lifetime studying.
>>
I don't know if OP is coming back, but when i think of a neon sign flicker it flickers in a very specific way. The light goes out and then flicks rapidly as the light is relit, this then happens at random intervals. I don't think LED candles are the effect he's looking for.
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>>1221894

I too just want to see the rest of this street god damnit
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>>1224290
Seconded. Damn that looks good.
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>>1221894
If you want a color you can't find the flickering LED in, you can wire a LED tealight in series with your led. Pic related, one will be the yellow/warm LED the other your halogen/cool blue color LED. You'll need around 6 volts, you can use a 9v battery and a resistor to suit the brightness you need.
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>>1224026
Faggot.
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>>1224211
They have their uses, but there's nothing they do well. For what """most""" people want to do with them, I'd recommend an ESP8266 and NodeMCU, on an Arduino form factor board if necessary, over C++ on an AVR, not least because NodeMCU has a REPL and Arduino does not. For that matter I'd support burning Forth into them before I'd support exposing people to C++.
I'm no elitist. I just know there are better ways to do the sort of mechatronic things that noobs want to do, that are just as if not more accessible, and I also happen to think Arduino is made of pure cringe. That's all.
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>>1221894
>Warhammer 40k
kys
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>>1224200
>Arduinos are great for plebs, like me
i hate arduino, everything about it is garbage, its an everyday fairly standard microcontroller that someone has crippled and then sold to you for excessive cost.

but

if someone who never had, never will have, is not at all interested in electronics as a hobby and just wants to make a doodad then its pretty much perfect. there are other platforms, probably just as good, but arduino hits the spot. can't fault it for that.

>>1225129
>there's nothing they do well.
>recommend an ESP8266 and NodeMCU
>Arduino form factor board
>REPL
>Forth
>just as if not more accessible

>made of pure cringe
look in the fucking mirror lol.
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>>1224289
+1 liked and upvoted
Thread posts: 51
Thread images: 12


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