As we move into 2020 we want to take a moment to talk about the latest version of the Box, version 1.3. We’ve dedicated much of the last year to developing it, and we LOVE it!
At the beginning of 2019 we sent 40 boxes around the world in our pilot. Following the feedback from that, and coupled with a wish list we had already built up, we identified a number of ways we could improve the Box.
At the same time we set ourselves the ambitious goal to build 1000 boxes by the end of the year. Building large numbers of the previous design wasn’t ever going to be practical, it was made up of a tangle of wires that we had to hand-wire ourselves and it relied on a variety of components ordered online from a multitude of suppliers. The Boxes were also subject to the occasional injury when transported around the world, so it’s suffice to say we had our work cut out!
Some of the ways we sought to improve the design included:
- Better audio – louder and clearer!
- Faster assembly time
- Fewer parts
- More durable design
- Logging boops offline
And so we started work in the spring; Adrian worked on designing the PCB as a neat home for all the components that were previously crammed into the box, George developed the awesome instructional graphics on the board and worked on software improvements, and Charlie designed a new acrylic ‘skull’ and mapped out the positions for the electronics and how they would be mounted inside the Box. So here it is…
The new PCB…
We LOVE the new PCB and it has a few important features worth talking about. Importantly there’s no wires. Previous Boxes included a large micro-USB extension cable, aux jack, and loads of wires which got in the way. Now the jacks are tiny components that sit at the back of the board and are devoid of the tangled wires that criss crossed older versions. This means we no longer have to hand solder anything (Yay!) and the boxes will be far more durable, reliable, consistent.
The ‘Brain’ of the Box is now a neat stack of three separate boards: A Raspberry Pi 3A+ sits at the bottom, then there’s our main custom board and progress LED board (affectionately known as ‘Blinky Lights’) which slots in a right-angle socket; and finally we have a stacking header and plastic standoffs which raises the reader high above the main PCB just underneath the surface of the box. Primed and ready for Booping!
There’s now a REAL-TIME CLOCK (RTC) too. Previously if a Box wasn’t on WiFi we had no way of logging when a Boop had happened because the Pi doesn’t keep track of time when it’s not online. So this new RTC allows us to timestamp a Boop and log it next time the Box is connected to a WiFi network.
Then there’s the DIGITAL-TO-ANALOG CONVERTER (D.A.C.). As the board says the D.A.C. ‘converts digital audio into analog sound for the amp’. This along with our super swanky and loud speakers make for waaaay better audio, that is free of static and incredibly clear. This alone makes the experience of using a Museum in a Box, particularly in noisy environments, so much better.
The new speakers not only pack a punch but also weigh a lot less which in turn makes them far easier to mount. V1.3 is almost half the weight of previous versions which will reduce both the cost of postage and it’s environmental impact when shipped around the world.
The new Skull…
With our new PCB came the challenge of mounting it inside the ‘Skull’. Past versions required us to fix bits to the sides, top, and base with an opening on the underside. This was fastened by screws in the feet and some t-nuts that were an incredible pain to mount and often came loose!
The advice we kept receiving when talking enclosures was to injection mould it. The main benefits of that being a moulded enclosure is ‘preassembled’ and ready to put the electronics straight in. It’s also very scalable and would allow us to integrate snap fittings into the design for mounting components inside.
To explore this we did a lot of research into moulding and a bunch of work CADing and prototyping different enclosures. We also took a team trip to visit Protolabs in Telford and learned a great deal from the brilliant people there and received an exciting factory tour of their setup. We attained quotes but ultimately decided not to go with injection moulding for two reasons:
1. The upfront tooling cost is very high and hard to justify for the small batches we planned to initially produce.
2. The overall aesthetic of the Box has become part our identity. The ability for us to easily modify the design, and teach others to build the Box (such as our amazing Verizon volunteers!) feels much more appropriate for our scale and values.
So, having decided to stick with our laser cut look we needed to find a neat way to mount the PCB inside the Skull. The solution was to switch from a bottom opening to a front loading Box. We created a neat groove on the back panel for the PCB to slide into and sit neatly in the middle of the box, lining up with openings at the back for the micro-USB and aux jacks. The Box can now be opened, the PCB removed, and replaced in mere moments!
The extra front and back panels are held in place and made removable by using some neat snap rivets which can be removed from the outside. We used these rivets for speaker mounting too where before we’d faffed about with tiny nuts and bolts and a laser-cut stand.
Other new features include a new progress LED board which is slicker and uses some recycled acrylic offcuts for the shims that we sent to the PCB manufacturers European Circuits. We spent a long time looking for the perfect light pipes to use with surface mount LEDs but ultimately decided to stick with through hole LEDs and our big green green LED. Why? Because they look bright and amazing!
A new Box deserves new packaging to go with it. We revisited a previous design using a more compact container and an insert that conceals the power plug and various admin and try me cards so all you see when unboxing is your shiny new Box!
Finally there’s the latest version of the software. We’ll talk about this in more depth another day but we’re chuffed that the Box now boots up waaay quicker than it used to and includes more audio guidance when working through steps like WiFi and updates.
The new assembly time…
With our new design manufactured we decided to assemble the first 20 Boxes. We were blown away to discover that assembly now takes ~7.5 minutes per Box – a 2000% increase from the old design!
In future this saving will enable us to fulfil orders quicker than ever before. The Box was intentionally designed for disassembly and as a result we proudly no longer use glue during the assembly process. The Box will now be much easier for people to disassemble and recycle at the end-of-life and we will share a breakdown of the parts and materials inside the Box in due course to make safe and appropriate disposal even easier.
And so with our shiny new Box design came our first test…
So there you have it, our new Box and the culmination of over nine months hard work. I hope that proves an interesting insight into some of the design decisions we made in developing v1.3. We love it and we hope you do too!
Our shop is now online so you can buy your very own v1.3 Box with a Make Your Own kit now! Kits are available in Individual, Educator, Small Org and Large Org options and colours include CMYK, Transparent, and Plywood.
Have a wonderful New Year from all at Museum in a Box.