The Valve Wizard web page is about tube amplifiers. They have a very good document on grounding issues in tube circuits. So read their 16 page Grounding document to learn about grounding (both general information and tube amplifier specific information). →
https://blog.hackster.io/introduction-to-injection-molding-d1597a442959 Unless your electronic product will be marketed solely to DIYers and electronics hobbyists it’s going to need an enclosure. Most likely this enclosure will be made of plastic that is injection molded to right shape. Injection molding is going be a big part of your journey to market so you need to understand injection molding →
https://blog.hackster.io/understanding-certifications-for-electronic-hardware-products-7f7f983ae5b2 Most electronic products require multiple certifications in order to be sold. The certifications required depends on the product specifics and the countries in which it will be marketed. This article will mainly discuss certifications necessary in the United States, Canada, and the EU. →
What is inside this old mains power filter? →
https://hackaday.com/2017/09/11/these-twenty-assistive-technologies-projects-won-1000-in-the-hackaday-prize/ This page introduces the winners of the Assistive Technologies projects. Take a look at many interesting open hardware projects. →
https://m.phys.org/news/2017-09-flip-flop-qubits-radical-quantum.html Engineers at Australia’s University of New South Wales have invented a radical new architecture for quantum computing, based on novel ‘flip-flop qubits’, that promises to make the large-scale manufacture of quantum chips dramatically cheaper – and easier – than thought possible. →
Here is one piece of additional information to my ground loop postings. Ground loops can be introduced when different components in audio systems are connected with standard audio cables, and these loops can cause annoying interference. Grounded audi components generally carry significant currents in their ground returns. Texas Instruments Application Report SLOA143 – October 2009: →
http://www.edn.com/electronics-blogs/benchtalk/4458731/Whipping-a-cheap-LED-PSU-into-usable-shape This interesting article analyses some cheap mains AC to 12V DC power supplies and how thet can be fixed to work OK. With some modifications they can be used to provide power to LED lighting. The writer of this article has a continuing love-hate relationship with Cheap Chinese Chotchkes – in this case, 18W power →
http://www.eetimes.com/document.asp?doc_id=1332192 At a Hot Chips event dominated by machine learning it was clear just about everyone is doing something in AI even though no one agrees on just what to do. Microsoft, Amazon and Baidu are pushing FPGAs to cloud. Google has Tensoflow ASICs. Intel pitched four of its chip families as different tools for skinning the →
http://syzygyfpga.io/# Open standard for high-performance peripheral connectivity SYZYGY is FPGA-agnostic and is intended to work with products from all major FPGA manufactures including Xilinx, Intel, Lattice, and Microsemi. PMOD and SYZYGY can happily coexist in the FPGA space and even on the same carrier implementations! FMC and SYZYGY can happily coexist in the FPGA space →