Techinc Wheel
| Projects | |
|---|---|
| |
| Participants | Narya |
| Skills | Electronics, Mechanics |
| Status | Finished |
| Niche | Electronics |
| Purpose | Promotion |
Contents
Bringing the wheel to events
If you can't reach Narya or Mariejel, assume a "yes" when you (a techinc member) want to bring the wheel to an event. Please put it back on the wall when the event is over. If the LEDs come loose you can simply put it back with double-sided tape and/or ductape.
Summary
- The wooden techinc wheel has a WS2801 LED strip stuck on the back and is controlled via an
Arduino Nanoesp8266 with ESPHome - The 8 strips consist of 5 pixels each (3 LEDs per pixel). The first "spoke" goes outwards, the second inwards, the third outwards, etc
- The data pin is GPIO4 and the clock pin GPIO2
- Color order is BRG, which is supported by the FastLED library, but for other libraries you need to put the colors in the right order
- The Wheel is on wifi, as 'ti-wheel.local'
- The wheel is connected to our HomeAssistant instance on 'https://spass.techinc.nl': device light.techinc_wheel
- The old arduino which ran the wheel before is included in the original enclosure that now (also) houses the ESP8266, in case a revert is ever needed.
Feel free to add/suggest extra code to the ESPhome settup, add sensors or whatever.
The wheel is not connected to Powerbars
Old Code
Currently the ColorPalette code runs on the Arduino.
Arduino code - work in progress
Things to make and do
This project has several parts: backlit the wheel, mount the wheel to the wall or on some stand, and make the wheel control something. It would be nice to be able to unmount the wheel and take it somewhere else, e.g. to display it at events.
Mount
Who: justa, narya, control-k
-
Location: on the wall - done - Location: infront of the window - Done
Painting
- NO color painting!
- Scratched parts could eventually be fixed with varnish
Backlit
Who: Narya, Brainsmoke and Mariejel
Who, later: Justa who moved it to ESPHome
Soldering: done
WS2801 12V magic strip
- 12V
- 40 addressable pixels, color profile BRG
- Wires: green 12V (not attached), blue clock (
pin 11GPIO02), red data (pin 12GPIO04), black GND (pin GND)
Color patterns
- Make a few color patterns:
- No rotation: colors of logo
- From center to outside and vice versa (knight rider)
- Rainbow glow - Done
- Rotating colors - Done
- FIRE - Done
- Twinkle - Done
Sensors
- Color sensor to change knight rider color for example
- Distance sensor: change color and/or speed. If hand is within 4cm it can function as a switch (switch between color programs)
Software
- FastLED library http://fastled.io/
- Neopixel library https://github.com/adafruit/Adafruit_NeoPixel
- Adafruit_WS2801 https://github.com/adafruit/Adafruit-WS2801-Library
- FastSPI library https://code.google.com/p/fastspi/
- ShiftPWM http://www.elcojacobs.com/using-shiftpwm-to-control-led-strips-with-arduino/
- Related projects @techinc: LEDLightDistrict, Neopixel
Old
Current code
esphome:
name: ti-wheel
platform: ESP8266
board: esp12e
on_boot:
priority: 600
then:
light.turn_on:
id: 'ti_wheel'
effect: 'Rainbow'
# Enable logging
logger:
# Enable Home Assistant API
api:
password: "xxxx"
reboot_timeout: 0s
ota:
password: "xxxx"
wifi:
ssid: "xxxx"
password: "xxxx"
# Enable fallback hotspot (captive portal) in case wifi connection fails
ap:
ssid: "xxxx"
password: "xxxx"
captive_portal:
web_server:
port: 80
auth:
username: xxxx
password: xxxx
light:
- platform: fastled_spi
name: "Techinc Wheel"
id: "ti_wheel"
chipset: WS2801
data_pin: GPIO4
clock_pin: GPIO2
num_leds: 40
rgb_order: BRG
effects:
- addressable_rainbow:
name: Rainbow
speed: 10
width: 40
- strobe:
name: Strobe1
colors:
- state: true
brightness: 100%
red: 100%
green: 90%
blue: 0%
duration: 500ms
- state: false
duration: 250ms
- state: true
brightness: 100%
red: 0%
green: 100%
blue: 0%
duration: 500ms
- addressable_twinkle:
name: Twinkle
twinkle_probability: 5%
progress_interval: 4ms
- addressable_lambda:
name: "Fire"
update_interval: 15ms
lambda: |-
int Cooling = 55;
int Sparking = 110;
// Adjust size of array to length of pixels
static byte heat[40];
int cooldown;
// Step 1. Cool down every cell a little
for( int i = 0; i < it.size(); i++) {
cooldown = random(0, ((Cooling * 10) / it.size()) + 2);
if(cooldown>heat[i]) {
heat[i]=0;
} else {
heat[i]=heat[i]-cooldown;
}
}
// Step 2. Heat from each cell drifts 'up' and diffuses a little
for( int k= it.size() - 1; k >= 2; k--) {
heat[k] = (heat[k - 1] + heat[k - 2] + heat[k - 2]) / 3;
}
// Step 3. Randomly ignite new 'sparks' near the bottom
if( random(255) < Sparking ) {
int y = random(7);
heat[y] = heat[y] + random(160,255);
}
// Step 4. Convert heat to LED colors
for( int Pixel = 0; Pixel < it.size(); Pixel++) {
// Scale 'heat' down from 0-255 to 0-191
byte t192 = round((heat[Pixel]/255.0)*191);
// calculate ramp up from
byte heatramp = t192 & 0x3F; // 0..63
heatramp <<= 2; // scale up to 0..252
// figure out which third of the spectrum we're in:
//this is where you can reverse the effect by switching the commented out lines in all 3 places.
if( t192 > 0x80) { // hottest
//it[it.size() - Pixel - 1] = ESPColor(255, 255, heatramp);
it[Pixel] = ESPColor(255, 255, heatramp);
} else if( t192 > 0x40 ) { // middle
//it[it.size() - Pixel - 1] = ESPColor(255, heatramp, 0);
it[Pixel] = ESPColor(255, heatramp, 0);
} else { // coolest
//it[it.size() - Pixel - 1] = ESPColor(heatramp, 0, 0);
it[Pixel] = ESPColor(heatramp, 0, 0);
}
}
Old Arduino inmplementation
#include <SPI.h>
void setup()
{
SPI.begin();
SPI.setBitOrder(MSBFIRST);
SPI.setDataMode(SPI_MODE0);
SPI.setClockDivider(SPI_CLOCK_DIV8);
}
uint8_t fade[] =
{
//[ int(((.5-cos(2*pi*x/240.)*.5)**2.2)*255) for x in range(240) ]
0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,1,1,1,1,2,2,2,3,3,4,4,5,6,7,7,8,9,10,12,13,14,16,17,19,20,22,24,26,28,30,33,35,38,40,43,46,49,52,55,58,62,65,69,72,76,80,84,88,92,96,100,104,108,113,117,121,126,130,135,139,144,148,153,157,162,166,171,175,179,184,188,192,196,200,204,208,211,215,218,222,225,228,231,234,236,239,241,243,245,247,248,250,251,252,253,254,254,254,255,254,254,254,253,252,251,250,248,247,245,243,241,239,236,234,231,228,225,222,218,215,211,208,204,200,196,192,188,184,179,175,171,166,162,157,153,148,144,139,135,130,126,121,117,113,108,104,100,96,92,88,84,80,76,72,69,65,62,58,55,52,49,46,43,40,38,35,33,30,28,26,24,22,20,19,17,16,14,13,12,10,9,8,7,7,6,5,4,4,3,3,2,2,2,1,1,1,1,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
};
uint8_t r=0,g=80,b=160;
void loop()
{
for(;;)
{
r+=1;g+=1;b+=1;
for (i=0; i<40; i++)
{
r+=6;g+=6;b+=6;
if (r >= 240) r-= 240;
if (g >= 240) g-= 240;
if (b >= 240) b-= 240;
SPI.transfer(fade[r]);
SPI.transfer(fade[g]);
SPI.transfer(fade[b]);
}
delay(20);
}
}
