 We're talking about a project which started as my toy projects pretty much and then I got tired of making unit after unit by hand. So I put it now on Kickstarter and see what happens. So what it is, essentially it is an LED light. You might think that the world has two manuals of LED lights already but apparently not use cases are covered yet. Yeah, so the use case is if you do any kind of outdoor adventures at night you know that it's pretty dark at night. You cannot see anything and it's not just you know empty black space. It is full of different objects you don't really want to bump into and as well you don't want anybody to bump into you. So what you do you put your light on right and all your smart friends they do the same. So now beautiful. We have collision avoidance problem solved but now we have another problem. How would you find which one is yours? So you need to be able to identify your stuff in the dark somehow and identify by definition should be unique. So with RGB LED what we can play with we can play oh yeah this is by the way how skyline looks in Singapore at the anchorage there. It's really difficult to pick up any particular light as such background. So with RGB LED what we can play with we can play with colors. We can play with flash durations. So essentially we're talking about multicolor strobe light but it has to be unique. So how you figure out what is unique and what is not. You look around and see if there is something else like this and then set the light signal to something different. So it has to be programmable easily. So it all started with plain good old microcontroller in days well before ESP8266. I tried different things programming wise and hardware wise it was pretty easy but what I stopped it is controls. So with RGB LED you have seven colors you want to play with. So it applies seven buttons and you need to turn recording on and off. Then if you add any extra features like ambient light sensor or timer buttons keep piling up and it gets unmanageable takes lots of space. It's difficult to make it all waterproof because it is for outdoor adventure it has to be waterproof at least. So I gave up until ESP8266 emerged. So then I said aha now I can use mobile phone as a control device and implement any UI I want any complexity anything and also I'll get remote control for free which actually works from up to 100 meters outdoors. So earlier prototype of this was actually demonstrated in a Christmas meeting more than one year ago at the disguise of a Christmas light. Hardware wise there's nothing really special there's ESP8266. There's a step down voltage regulator for the ESP8266. Then there are three identical LED drivers and LEDs. One interesting hardware challenge I ran into is that since ESP8266 is essentially not the proper microcontroller but the Wi-Fi model it doesn't really handle brownouts well. For those who doesn't know brownout is a situation when voltage drops well below nominal but not all the way down to zero yet. So what I found was happening since battery is not such a strong power source for a big load like powerful LED. You turn the LED on voltage drops not enough for the whole unit to be reset but enough for the brain to stop working. So light is on but brain is not there anymore so light stays on until battery discharges all the way so classic lights are on but nobody's home situation. The thing is that I already had ADC the only ADC being used for ambient light sensor so I had to use a dedicated voltage monitor I see for this. Software wise it is nothing special. C-code on 8266, Android applications and iPhone application will be available after crown funding and it all works via HTTP. Mechanical design well it had to be weatherproof reasonably strong weatherproof implies rubber ring which implies cylindrical shape so it is pretty much like a beer can. The prototype is 3D printed and if crown funding will be successful it obviously will be injection-moded and now we can write down the network name and password to connect to the scene, download the application just search for I see the light in google play store and with that I finish my presentation and just pauses in the round for you to play network name and password of the day. Okay so thanks Alex so now we have the next speaker