All new videos for KS4 GCSE Design Technology (AQA/Eduqas) covering Core Technical Principles and Specialist Technical Principles as well as KS3 Food technology.
As an aside to logic gates there are actually 4 more than the original 3 (AND OR NOT). These are combinations of gates that produce outputs, used often in digital logic. XOR gates 'exclusive or' are OR gates that only return true if the inputs are not equal i.e. (10 and 01 return 1, where as 11 and 00 return 0). These come up a lot in fundamental digital logic circuits for example in an adder circuit (adds numbers, have a think about what it means to add a number in binary, then google if you're curious). The other 3 gates are less abstract NOR NAND XNOR are the 3 respective gates with a not on the end, inverting the output. This is mostly important because NAND and NOR are considered 'universal gates', the behaviour of any gate can be replicated using one or more universal gates. Generally when we design digital systems, we define the behaviour we wish to exhibit, then transfer it all into NAND or NOR gates, since they are cheaper and easier to fabricate. These gates seem pretty abstract but they are fundamental in boolean algebra, which gives us a language to describe behaviours of digital systems, and also a few tricks, such as universal gates. If you're curious about digital systems, as the link between transistors (fundamental electrical components) and registers (fundamental building blocks of a computer) I'd encourage you to learn more, a fun way is redstone in Minecraft, people have made full computers, there are also digital logic simulators online. Focus on understanding the behaviour and what you impliment it on won't matter.
To my knowledge, the AQA spec has not been radically updated since its release in 2017, so the vids are still relevant (phew!) If you find any discrepancies please do post and let me know
That's an excellent Q and one we keep having to address. There's no hard rule - and there is definitely a grey area between the 2. Generally, continuous is for products we can't manage without
Omg, thank you! This is honestly one of the projects I've designed I'm most proud of ☺️ all the resources are available from TES in the description box. Enjoy!
My school just sitting near with a vacuum former with a broken seal, 2008 sketch up, cura 3.4.1, an Ultimaker 2, one working laser cutter, out of date 2d design and a laser cutter laser that needs 3k to be sent to the states for re-gassing
Sorry to hear that but we all make do with what we have. If you access to sharp hand tools or a sewing machine at least you're on your way to be a skilled carpenter or dressmaker. I am very lucky to have a comfortable budget but it's having a great team that makes for great projects
That's wonderful to read, thank you 😊 haha, I'm trying, but this time of year is so busy I barely have time for my regular responsibilities! Hopefully over the summer 😉
So happy it has been useful ☺️ Tin and Zinc really have the same same advantages and disadvantages. They're primarily used to coat other metals and they're too soft to use for a lot of products alone
