Moles, Avogadro’s Number, and Atomic Mass Units

I quite enjoyed Chemistry in Secondary School: I think I even did a CSYS course in it. However, I remember always having problems with the concept of a Mole and the calculations surrounding it. I’m not sure if I was being particularly dim, or just didn’t have enough context be able to relate to itContinue reading “Moles, Avogadro’s Number, and Atomic Mass Units”

Making Skeletonised Leaves

I decided I wanted to try making some skeletonised leaves. So I did some Googling and decided to try this approach. We went out in the evening and gathered some leaves from the local Shrubbery. Totally not suspicious 🙂 I bought some Sodium Hydroxide and a cheap steel pot from ebay. Note: it must notContinue reading “Making Skeletonised Leaves”

Knitting Machine: Needle Router Working!

Check this out! I’ve actually had the main design on the whiteboard for a few weeks, but I wanted to play with other things for a bit: This is v2.1 of the needle router. I don’t think showing the intermediate v2.0 is very interesting: the changes were important, but minor. Anyway, let’s compare the designsContinue reading “Knitting Machine: Needle Router Working!”

Making a Copper Leaf and Perspex Lampshade

This is a slightly older project, but since I’m waiting for the new knitting machine design to print, I thought I’d write it up. One of our standard lamps needed a new shade, so I decided to make one! Ingredients 2mm + 3mm transparent Perspex (from Edinburgh Hacklab) Copper Leaf (from Ebay) “Size” (gilding adhesive)Continue reading “Making a Copper Leaf and Perspex Lampshade”

Boiling Water in a Vacuum at Room Temperature

My Vacuum pump and chamber arrived! I went for a Bacoeng 3 CFM Single Stage Oil Filled Rotary Vane Pump (BA-1) and a slightly more expensive tempered-glass-topped 6.8L vacuum chamber. I could have got the slightly cheaper perspex topped vacuum chamber, but this wasn’t that much more expensive. The glass one is safe against variousContinue reading “Boiling Water in a Vacuum at Room Temperature”

Knitting Machine: Needle Movement Controller First Test Print

I decided it was time to try out the prototype design! I printed half of the needle movement model to save on time and materials. As a result you need to move the carriage in both directions to see the full needle movement. I also adjusted the design slightly, adding in some fillets to roundContinue reading “Knitting Machine: Needle Movement Controller First Test Print”

Knitting Machine: Needle Movement Model

I spent some time this evening turning the sketch into a proper Fusion360 3D model, as above. Key features: I’ve inserted holes for all the M3 bolts I need to use to hold the moving parts together. I’ve also added some more chunks of plastic to try to prevent needles getting stuck. I’ve already gotContinue reading “Knitting Machine: Needle Movement Model”