Sauce Bot on Hackaday

We are pleased to see our sauce bot for Bunning BBQ on hackaday!

Please Vote For the CCHS for Pick My Project

Hello All,

We have applied for the grant scheme Pick My Project.
We are applying for funding from the Vic Government to help us fund courses that will be free to the public throughout the year.

Hydroponics in a Vending Machine aka (The Purple Plantiator) L.E.D.s

The lighting rig in all its glory.


We designed a lighting rig for the plants to give each plant 6 strips of LEDs. The design was built using our laser cutter and bolted together. Each stip was stuck on to the laser cut acrylic and then hand soldered together.

Laser Cut Design

Lighting Rig

When researching lights for Hydroponic solutions we found that we could get LED lights that targeted the absorption spectrum of Chlorophyll in plants. These lights put of the brilliant purple glow you see in many hydroponic setups. These lights targeted the following wavelengths: Red 625-660nm; Blue:450-465nm. If you look at the total absorption spectrum of Chlorophyll you will see that our lights are missing some parts of it. To augment we plan on putting some 6500 Kelvin colour temperature lights into the vending machine so we are covering the entire plant spectrum.

LED strips for growing plants

Chlorophyll light absorption

Hydroponics in a Vending Machine aka (The Purple Plantiator)

We have had a vending machine at the hackerspace for years now. It has been left disused and taking up space. So we decided to use the vending machine as a place to grow plants.

So for the past few weeks, we have been building a hydroponics setup in our disused vending machine.

Our disused vending machine

Our new plant growing vending machine (not yet finished)

For those who do not know hydroponics is where you grow plants in water. No soil is used and all the nutrients for the plants is leached out of the water.

Our setup is very close to this one

Our setup has two “grow rings” each hold 8 plants for a total of 16 plants. It has a reservoir of water underneath the base of the vending machine. The water is taken from the reservoir and pumped into the top grow ring, where it flows around the ring to the exit tube. The water then trickles down into the second grow ring near the bottom of the machine, the water flows around the tube to the exit back into the reservoir. This continuous flow keeps the nutrients circulating so the plants can absorb more nutrients and not stagnate. It also increased the amount of dissolved oxygenated water that the roots of the plants need to survive.

We also have a fan setup to cycle the air around the plants when the lights are on. This is very important as the lights can put out a bit of heat and we don’t want to cook the plants. We also need a fan to remove the oxygen from the closed machine as it will build up and slow the plant’s growth.

In our setup, we are supplying artificial light to the plants using L.E.D.s since no natural light gets into our vending machine. We will talk more about the lighting rig in a later post.

So the system we build is not yet finished but we have tested the basic plumbing. We still have to install the pump and sensors. We indented to have sensor detecting overflow of water if we get a blockage as well as sensors detecting humidity and temperature. We will be logging all this data to an MQTT server so we can pull real-time statistics from the system.


One grow layer. You can also see the silver insulation inside the machine.




Exciting times ahead for this one disused vending machine!

Exploring 3D prints and finishes

3D printing is amazing at creating details pieces, and the ability to finish a print with paint, waxes and surface detail can make your plastic peice look like it is made of completely different material.

Here is a 3D printing model of the medallion from the film “Raiders of the Lost Ark” finished to look like brass and weathered to put a few hundred years on the piece using paint and rub and buff metalic wax finish.