Introduction: ROTLD Inspired Sign With App
here is a great way to make a custom phone controlled edge-lit sign. Costing under $20 - it's quick, easy and a great intro to electronics, programming, 3D printing and etching - no previous experience necessary.!!
Halloween is nearing, celebrate it with this new age Return of the Living Dead inspired edgelit sign
you will need;
8x jumper wires
1x usb cable
let's make >
Step 1: Etching
first i found a high resolution image of the movie flyer on google images; https://i.ytimg.com/vi/Aj2BwZ9SR_0/maxresdefault.j...
then converted it to vector graphic, you can download the design files here; https://drive.google.com/drive/folders/0B8bvYGugxv...
i have used laser cutter to etch the design. if you don't have access to a laser cutter, you can use online service ponoko - or search for a local makerspace, become a member and get making.!!
we have to use 120x120mm and 0.25" thick acrylic (or glass) - you can also etch the design using a dremel tool, here is a good instructable for more info; instructables.com/id/Etching-Glass-With-a-Rotary-Tool/
Step 2: 3D Print
I designed the light + arduino base using free browser based design software tinkercad, it is very easy to use especially for total beginners, give it a try.!!
you can see the file here, and edit it if needed; https://www.tinkercad.com/things/jKrcDAMoRt9
it is also on thingiverse ready to print; http://www.thingiverse.com/thing:1798589
Step 3: Solder
First snip 3 male to male breadboard jumpers and strip the insulation on the wire, revealing the cable inside.
Now solder the three wires to pins, Din, GND (any) and 5VDC pins on the neopixel light. Now we have a plug & play light
Step 4: Breadboard
Now you can place the breadboard into the hole, the light will go into the small notch above it..
Step 5: Lights
place the light in to the slot with a tiny bit of hot glue while holding it in place.
Step 6: Circuit
Above is the circuit you have to follow. Its very simple;
Din on neopixel > D4 on nodemcu
Vin on neopixel > Vin on nodemcu
GND on neopixel > GND on nodemcu
we use the onboard USB port to program and to power the nodemcu once it's ready.
Step 7: Wiring & Back Cover
Mount the nodemcu board on to the prototyping breadboard. Attach the rest of the wires according to the schematic at previous step..
now the back cover goes on top of everything with some hot glue. my board is blue, but everything is same still..
Step 8: Base Assembled
Everything glued into place, looks pretty neat :)
Step 9: Place Sign
The etched sign just slides right into the hole. its tight enough to hold itself up, but you can always remove it from the base to take a closer look and place it back for lights.
Step 10: Blynk Setup
we'll first start with getting the blynk app ready on phone/tablet.
- start new project, name it, choose board: esp8266, email yourself AUTH TOKEN
- add widget > zERGBA > merge > Pin V2 > 0-255 on all > send on release OFF
Now you can press the play button top right of the app screen, once the nodemcu is programmed on the next step, you will be able to change the color of lights from app
Step 11: Arduino Code
to program the wifi board we must first follow few one time only quick download/install steps. ask in comments if you are stuck.
- install nodemcu driver on laptop
- restart computer before going any further.!!
here is the code;
make sure to carefully read lines 4 & 20 and make necessary changes in your code before upload.!!
you must copy & paste the code above to the arduino software on your computer.
- open arduino software
- clear the text in the box, and paste the code from above
- plug in nodemcu to laptop
- go to files > tools > boards > scroll down to choose "nodemcu 1.0"
- go to files > tools > port > scroll down to choose the correct port associated with nodemcu board
- after changing the wifi & blynk credentials in the code, now go to sketch > upload. after it compiles for errors, .
you can now control your sign from your device anywhere in the world.
Step 12: Conclusion
Congratulations, you are now ready to display your favorite Halloween theme this year.!! You will also be able to impress your friends & family with phone control app as well.
Hope you enjoyed this instructable and will give it a try. Please remember to follow, favorite & share.
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