Is There By Diy Chain Oiler?

I was looking at the scottoiler thig, I haven't been able to see a diagram to see how it works so I can build my own, it's hard for me to search online as I mostly use my cellphone for Internet browsing, I've seen some posts on google but can't realize how it really works as pics and instructions or descriptions are very poor...

The principle of Scottoiler is pretty simple. There is an oil reservoir, an on/off valve controlled by either vacuum of the engine or in electrical version electric adjustable valve which control the oil flow. Then there is a hose from the valve to the nozzle to drop oil to the chain or to rear sprocket.

There is another system as well which is not manufactured by Scottoiler, I do not recall the name, where the oil drain is controlled by the vibration of the bike. There is a valve with a weak spring which just keep the valve closed and when the bike vibrates, it will let the oil flow to the chain.