Topics created by bruno

@Jantle said: HLK-PM01 is the way it is - unless you use a different one or a new version comes out, you cannot change the distance between pins. With regards to the the left pins, there is nothing connected to those. And if you keep it that way by not connecting anything to them, I do not see how a problem can develop. Good point about the relay and nrf24l01+ - personally I am not using the relay on these boards and should be fine. Hello Bruno, I took a look at your PCB, hope you did not order it already as there is a big issue. Please see red circle in attached picture. Distance between traces is less than 0.3mm! Absolute recommended minimum between mains and other signals is 3mm for 230V. As soon as there is a connection or just significant capacitance to ground on the low Voltage part of your PCB (like human being or long wires to light switch) your arduino and rest will most likely immediately be destroyed

@alowhum There will be a wealth of information out there on the net and probably also at your local library. look for resources about remote cabin power systems and also even the larger 5th wheeler type caravan systems will be helpful reading. You will also need to check your local building codes to see if there are any rules to be adhered to. When we built our house (about 15 years ago, long before i discovered MySensors we ran a low voltage backbone cable throughout the house. From this backbone we ran smaller cable drops to every room in the house. Many of these are still not in use but as others have said the cost of running wires is relatively cheap when you are building. Of course we still have mains power as well and use the low voltage system to compliment this. In those initial years the 12v system was used primarily for lighting systems such as night lights etc. As time progressed we installed 12v outlets in the bedrooms and these now are used to power bed/reading lamps. The small 12v downlights have also proved to be very easy to convert over as well. These were initially halogen bulbs but now there is a good range 12v LED replacements for just about any type of socket. Once I discovered MySensors and home automation then the 12v system became even more useful now powering several nodes and even the gateway. Right from the start we ran our system from a battery with solar charging and in 15 years it has never let us down. Voltage drop will always be a thing to watch, but with LED's low power draw and as you have surmised the ability of arduinos to run well below 12v it will usually be of little practical concern. Unless of course you are thinking of running more than lights and nodes.