sundberg84 Don't bother, I went through the hassle, downloaded Eagle and created readable PDF

Sorry to bother you again (3rd time), still waiting for readable PDF of Rev. 9 schematic and board layout. Thank you

What software was used to develop this board? My latest KiCad does not read schematic from Rev. 5 ZIP file. All I need is a simple PDF...

I am also looking for documentation for Rev. 9 that I purchased. The link with revisions that was provided: https://www.openhardware.io/view/4/EasyNewbie-PCB-for-MySensors#tabs-revisions
lists revisions 1-7, but not 9. All I need is readable schematic and PCB layout in PDF. Thanks.

@monte Well, yes there are few designs with very low power consumption, I believe less than 2-3mA, designed & FM certified to eliminate shock in case of failures. I guesstimated 2-3mA because typical GFCI trip point is 4-5mA, so GFCI allows ground current leak of less that 4mA. That is why it is important to specify expected power consumption.

@jeremushka Before helping you out here are a few thoughts to share:

1. I have to disappoint you, AC-DC transformer does not exist. By definition, transformer is an AC to AC device, so most likely you are looking for a power supply (PS) to convert 220VAC to 5VDC.
2. How do you expect to power PS without neutral wire? Use ground wire instead? in USA and most likely in other countries, ground wire must not be load carrying wire. There are few designs with very low power consumption, I believe less than 2-3mA, designed & FM certified to eliminate shock in case of failures. I guesstimated 2-3mA because typical GFCI trip point is 4-5mA, so GFCI allows ground current leak of less that 4mA.

If you don't care about 2) at risk of electrical shock, lawsuit, etc. advise:

3. What is expected power consumption
4. What form factor required (PCB module, panel module, wall plug, etc.)

Just schematic and board layout, exactly what you placed, if possible in a bit better resolution. Thanks a lot!

Can you please share design of version 9 of the Easy PCB NRF24 edition. I bought 10 pieces a while ago but just decided to use couple. Thank you.

I would like to clarify operation of the sketch, where more than 1 sensors input are used along with more than 1 relay actuator. in one node

1. Does node need unique child ID for each sensor input AND relay output?
2. If that is the case how child ID is assigned to relay actuators in the above examples?

Lack of support makes you think, so I figured out the "hidden" calculations in the sketch above and proposing the code modification to allow users to port the code to a different gas sensor using data taken directly from the sensor chart. Here are modified fragments of the code showing only CO curve for MQ2 sensor:

float CO2Curve[4] = {0.8,200,2.2,10};
//two end points are taken from the curve with two coordinates for each point
//in form of{Y1, X1,Y2, X2) where X is PPM axis, Y is Rs/Ro axis from the sensor chart for specifc gas
//then equation X=(Y-b)/m is used,
//where m is slope of the curve, b is Y axis intersept point
float Slope = (log(pcurve(1)-log(pcurve(0))/(log(pcurve(3)-log(pcurve(2));
float Y_Intercept=log(pcurve(1)-Slope*log(pcurve(3);

int MQGetPercentage(float rs_ro_ratio, float *pcurve)
{
{ return (pow(10,((log(rs_ro_ratio)-Y_Intercept)/Slope))); }
}