So here we have it guys, Revision 2 is now complete, tested and working perfectly! Its been a grueling process but so rewarding. I plan on making a few tiny little changes, including some headers/jumpers to allow ISP uploads while the radio is attached and pull-up resistors to the switch lines. I will get these all ironed out in the next few days and get the designs sent off to get the final boards manufactured. However, I don't feel that there is a great rush for this last board as the upgrades are very minor ones that won't effect its usability right now. The files on the original post are all up to date and relevant including the schematic. I'm yet to test the current draw, I'm trusting that it is sleeping in between the switch toggles, would this be tested via the current draw, if so where should it be measured to confirm this?

Here are a few photographs of the final board attached to a switch plate:

And in full swing of prototyping, as promissed:

With a little open-heart surgery, the board becomes alive! While I'm yet to actually burn any bootloader to the uC itself, I have no got the circuitry working.

The known issues:

• Capacitor on the SPI Header was incorrectly connected. I had wired it like a resistor/diode.
• The VCC line from the SPI was connected to the uC through the resistor of the RESET circuit.
• Battery holder is connected in reverse.

I have attached images for anyone interested in following this project with actual pictures of the progression through the revisions of this node. I have now made some alterations in my documentations regarding Rev1, listed the known issues and made some possible improvements:

• Remove one 47uF capacitor.
• Move the 47uF capacitor closer to battery terminal, and have all power traces coming through that capacitor, reducing the chance of the battery being drained through large spikes in draw.
• Add capacitor to FTDI VCC to stop spikes when connecting programming board.
• Increase silkscreen labels for document data such as pinouts and node info.
• Remove the 100uF capacitor on the nRF24l01+, add a 4.7uF footprint and 0.1uF footprint. Only populate if needed.
• Turn around the switch terminals, room should allow this.
• Bring the 0.1uF capacitors closer to the VCC inputs on the uC.

This week I will be aiming to get the designs and re-routes for Rev2 sorted out, and then get them ordered, with express shipping this time hopefully. The 3 weeks of waiting killed me!

Please give your feedback, if you have any.

This is mine in the clean state, a decent working size but its not a dedicated area, it has to server as my office too. I'm looking to extend the desk round to the left under the window and have a dedicated electronics area. I will upload a image of the desk in action in the near future.

Some little Ni-Cad cells in the right storage hole as you can see, this is the only electronic piece out at the moment

BINGO!!

We have a working coin cell powered light switch.

I will upload some decent images later on tonight or tomorrow.

I'de just like to talk everyone that has contributed to this thread/post and enabled me to create my first of many embedded projects. I'm applying for a University course in september for Computer Science (Smart Technologies), all about embedded systems, drones, home automation etc etc. This is just the beginning!

I'll get this project up on OpenHardware.io asap as Version 1 and we can build on this as a base plate for futher projects.

The first of many new tools to reside on my desk/bench!

And the first of many to arrive is the Figaro Carbon Monoxide sensor.

I think we should get a tooling topic going, what major testing equipment we all have and what we wish to gather in the future (if any) and then recommended tooling for new comers to purchase to help get their hobby off to a good start. Yes, I'm in that later category.

I will get one made within the next week if no one does it before me. Too busy right now unfortunately, so would appreciate if someone else did it but if they don't I will see to it asap!

Here is the schematic for the sensor:

@sundberg84 - Thank you for spending your time to iron out all the information floating around the internet currently regarding this topic, to some it seems very overwhelming when researching to design a module, myself included struggle with this topic. Your time spent will help others save time and effort, again, thank you!

@tbowmo I completely agree and this is the side reason to why I stopped pushing it further than making this thread. I have no interest in asking @Hek to incorporate anything like a slack chatroom while he currently has the instant messaging chat on here. If he wants to alter the way instant chat works in a sense of having it more like slack/chatter etc, then that is up to him, but i will not pressure that to him. I will say that the only reason why I wanted to start a slack chatroom for us is because of the fact you can track peoples status (online/offline) and that you can have chatrooms which equate for a much more relaxed 'hang-out' area alongside of a serious method of communication.

I'm also a big fan of IRC and that is something that is also pretty easy for people to get to us, a little harder than slack for general users but its something that i use for my various other open-source software activities.

There were many different routes i was looking at when i started this suggestion but as there really was no traction (i think 3 people joined) I just folded the thought of it.

@m26872 - I do this too, hotter the iron is the better for me. Hotter and quicker wins the race.

@Nca78 - This is exactly why i was shocked when someone got away with it. They get personally checked every time and soon as they pick something up where they can see two separate boards there then they refuse it unless you paid the extra for the panelising.

@kalina - I knew you could do it o.O

Am i the only one that struggles my as off with 4 pairs of pliers on these little annoying things?

Testing and updating can resume now my first year at university has finished and I now have 4 months worth of MySensors development to get started on!

Everytime I panelize anything I get charged for specifying that it is panelized, even if i specify that i've done it and don't need them to do such. Do you just submit the board as a normal board but have your milling and drills such that it allows you to remove them all when you receive the product?

@dbemowsk - I don't. And right now i'm not even thinking about it as i've done my far share of detailed printing and i do not wish to print anything slow and small scale that requires 0.08 mm layer heights and support everywhere. My printer has been on solid for the last 88 hours on 4 prints doing exactly that.

I'm trying to slowly approach my maximum speed, printing comfortably at 60mm/s at the moment but would like a little more. My printer is pretty basic still, i'm still a student living at home so i'm saving money everywhere i can right not but as soon as i have no income issues, dual extruder, advanced bed probing, enclosure, quick change hotends with a tornado extruder maybe.