The 2nd Chelmsford Raspberry Jam

Average man Stand at the Chelmsford JamI had some of my recent projects on show, including my BURT robot

Another week another Raspberry Jam. I made a promise to myself to attend more events this year and so far I’m well on track. I’ve attended the Egham Jam, the first ever Kent Raspberry Jam and now Chelmsford’s second event.

Chelmsford is around 40 minutes from my home town of Southend, and also the same town city (it’s now a city) that I play ice hockey in on Sunday nights.

The event stuck to the traditional format (if there is such a thing) with good mix of learning areas, workshops, talks, show n’ tells and sellers dotted around the venue.

Enough intro – let me show you a few things that I managed to capture…

The Venue

The Chelmsford Raspberry Jam was held in the city’s huge central library, which offered a large floor area all to ourselves with separate rooms for different activities. With ample multi-story parking next door to the building, getting there was hassle free.

Chelmsford Central Library

Chelmsford’s Central Library (image courtesy of Stephen Richards)

Chelmsford Raspberry Jam Highlights

Once again I spent most of my day at my show n’ tell stand talking to fellow geeks and makers, showing off my BURT robot and other projects. I love meeting readers and having a good chat about all things Pi, but of course this limits the amount of time I can spend wandering around myself.

I did get a few chances to nip out though, and here are some of my favourites…

Rare Unpopulated Raspberry Pi PCB

The show n’ tell stall next to me had a very rare sight just casually laying on the table:

Unpopulated Raspberry Pi PCB Front

The front of the unpopulated Raspberry Pi PCB

This is a bare Raspberry Pi PCB. No components, completely unpopulated and attached to a PCB frame. These things are the ultimate Pi collector’s prize and something I believe you only get as a prize/reward/gift from the Raspberry Pi Foundation.

Unpopulated Raspberry Pi PCB rear

…and the rear

The owner is a young chap known as ‘CrazySqueak‘. He was awarded the PCB for his code submission as part of the Astro Pi competition. CrazySqueak’s code is currently flying in the ISS above our heads waiting to be used by Tim Peak. Cool huh?!

Crayfish Pi

There’s always a really smart person at every Jam, and so far that hasn’t ever been me. This time it was Andrew Lewis with his impressive ‘Crayfish Pi’ setup:

Crayfish Pi Supercomputer Cluster

I tried it. It tasted nothing like fish…

What you see here is 4 ‘clustered’ Raspberry Pis set up a bit like a supercomputer. They were working away calculating separate ranges of prime numbers, reporting their numbers back to a separate main Pi to display the combined results on screen.

Crayfish Pi Raspberry Pi Cluster

The main Raspberry Pi gathered date from each ‘working’ Pi to display results on screen

This might seem pointless until you realise that you can apply this processing power to all sorts of things. Andrew caught my attention when he mentioned that it can be used for predictions. My ticket to the Grand National has been booked already!

Official Raspberry Pi Weather Station

For some reason I had failed to notice this new weather station from the Raspberry Pi Foundation. Luckily Jim Darby had brought a prototype of the parts along to share with Essex’ finest geeks:

Raspberry Pi Weather Station

The Raspberry Pi Weather Station – Work in progress

I learnt from Jim that this project was actually the result of a grant from Oracle (you know, the database guys with the red sign), which included the design of the station and also an education programme to go with it – stretching the Foundation’s charity efforts even further.

At the moment it’s a prototype of plastic parts and some sexy looking PCBs, but I understand it’s due for completion very soon.

Oracle Pi Weather Station PCB

The weather station’s PCB. I’m not 100% on what this part does, but you can bet your ass it’ll be cool if Oracle are involved!


Mark Turner, someone I see regularly at jams with his robot arm projects, came along with a new build he was working on – R2DPi (that’s the name I’m giving it anyway).


This reminds me…I still haven’t seen a single Star Wars film!

It’s still work in progress, but even at this early stage Mark has managed to get some cool features running (ish). For starters he’s using Jasper to command the Star Wars robot with his voice…which didn’t seem to work very well with the background noise in the room, but it was cool all the same.

R2DPi 3D printed legs

3D-printed legs add to R2DPi’s charm

He’s also 3D printed his own legs for the robot…which I must mention is made out of a novelty Star Wars bath bottle! Add to that a Pi camera in the top section and it’s looking like a promising bit of hackery.

Display-O-Tron Pi Radio

You may remember the name Zach Matcham from my Egham Jam write-up. He brought along his Pi Zero gaming machine in a PS1 console casing last time I saw him. This time he brought a project that takes me back to one of my first ever projects with the Raspberry Pi – a Raspberry Pi Radio:

Display-O-Tron HAT Radio

Zach’s Display-O-Tron HAT radio

Whereas previously I had used mpd/mcp and other functions to make a radio out of a Raspberry Pi, Zach told me his version was running off VLC – something I didn’t know the Pi could run. This means he can pick up popular BBC stations which I couldn’t get working with the method I used previously.

He used a Display-O-Tron HAT to handle the display and input side of things, which kept everything in a nice small package.

Steamin’ Leccy

The last thing to share is a cool Wilesco steam engine that was brought along by ‘Dr Hannah‘. OK it’s not directly Pi-related but this scene is open to anything electrical and gadget/gismo-like, especially when they involve fire!

Wilesco engine

We couldn’t use the little engine indoors, too many flammable books…

I would have loved this as a kid. You pop a little fire lighter under the main tank, which boils water creating steam, which then feeds down the pipes and eventually starts turning the big red wheel which is connected to a dynamo.

With the small amount of electricity it generates, you can experiment lighting LEDs or making more advanced circuits to do ‘stuff’ with your heavily polluting retro energy source.

Everything Else

Some of the areas I didn’t manage to have a good look at were:

  • The soldering workshop – teaching people how to solder using Pocket Money Tronics kits for a small donation
  • The Robotics workshop – assembling simple robots using the ultra-affordable £17 CamJam Robotics Edukit
  • Astro Pi/Sense HAT workstation tutorials
  • Sonic Pi workstation tutorials


As you can tell, there was loads to see and do at this reasonably new and local Jam. I’m still making my way around the county but this feels like the largest Jam I’ve been to in the Essex area so far.

A big thanks to Andy (@Andy-SouthendRPiJams) and the rest of the team for the well organised day, especially for the ‘quiet area’ for exhibitors including the sugary goodness courtesy of Dunkin’ Donuts Chelmsford. This was particularly popular with a starved Average Man around 3pm…

Until next time…

1 Comment on "The 2nd Chelmsford Raspberry Jam"

  1. I loved it .. I live in Basildon so I’m a little too far away from soslug though I try to get to the Southend jams when they’re on … but Chelmsford was perfect for me … I’m soldiering up my protocam+ as we speak … … should have gone to the soldier classes me thinks! … lol!

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