README

It begins with a 20W LED chip which needs appropriate power and cooling. For the power, there is a constant current power source with AC 220V input and DC 40+ V output. As for cooling,... old laptop heatsink and fan! Ok, great, but is it possible to run the fan only when necessary? Yes, if we can measure the heatsink temperature and control the fan. And what if we could monitor it (possibly remotely -internet)? ESP8266.

mqtt broker

Docker container

docker run -ti --rm -v $(pwd):/opt/mqtt --name mqtt -p 1883:1883 alpine:3.2 /bin/sh
apk add --update mosquitto
/usr/sbin/mosquitto -c /etc/mosquitto/*.conf

Data collection

GRAPHITE_HOST=$(container_ip.sh graphite)

docker run -d -v /var/run/docker.sock:/var/run/docker.sock \
    -e GRAPHITE_HOST=$GRAPHITE_HOST -e COLLECTD_HOST=<colllectd host> \
    bobrik/collectd-docker

Data storage

Docker alpine collectd

Data visualization

Graphite docker container

#!/bin/bash
[[ -d /tmp/log/{graphite,nginx} ]] || mkdir -p /tmp/log/{graphite,nginx}

[[ $(docker inspect -f "{{.State.Running}}" graphite) == true ]] && docker start graphite

docker run \
   --name graphite \
   -v /tmp/graphite:/opt/graphite \
   -v /tmp/log:/var/log \
   --rm -ti -e COLLECTD_DOCKER_APP=toxia-mgr \
   -p 2080:80 \
   -p 2003:2003 \
   -p 8125:8125/udp \
   hopsoft/graphite-statsd

BIll Of Material

Lamp

LED chip 20w
Power module 20W

Cooling

Recycled Laptop CPU / GPU cooler (metal)
Recycled Laptop CPU / GPU cooler (fan 5V)
Step-down power regulator 40V to 5V

Sensor / controller

ESP8266
DHT11 Temperature/Humidity sensor
LED which will report status:
- Off when everything is OK
- Blink when not connected to Wifi (every 1/3s)

dserfez/LED-svjetlo