This application note gives PCB design tips for reducing EMI in automotive environments. A lot of the advise can be applied to any PCB layout. [via]
Electromagnetic interference (EMI) and electromagnetic compatibility (EMC) testing is an important part of design verification for serializer/deserializer (SerDes) devices in automotive applications. EMI and EMC must be considered early in the design cycle to prevent needless design revisions. The following application note details helpful, basic concepts and guidelines on how to prepare your SerDes system for EMI/EMC testing.
Designing PCBs for automotive applications – [Link]
Vinegar – Distilled White Vinegar – diluted with water to 5% acidity (Meijer)
Peroxide – 3% solution (Meijer)
Salt – to taste. (Just keep adding it until the “fizzing” continues all by itself).
Hydrogen peroxide is what we call an oxidizing agent (a mild one), meaning that it easily accepts electrons from other species to form H2O (hydrogen peroxide itself is electron deficient). What happens when it “dissolves” copper metal is that a neutral copper metal atom releases two electrons, to form a Cu2+ ion in solution. All metals tend to release electrons to form positively charged species….we refer to anything that DONATES electrons as a reducing agents. The strength of metals as reducing agents varies and copper is a fairly weak reducing agent.
Hydrogen Peroxide, Distilled White Vinegar and Salt as a PCB Etching Solution – [Link]
We recently ran across another 3D printable PCB accessory on Thingiverse. This time it is a stand-off that slips on the edge of a PCB and the edge of a piece of plywood. This is a quick way to mount your PCB on the side of a project or into a project enclosure.
3D printable PCB stand-offs – [Link]
This project is a result of needing to service a domestic electronic item without being able to obtain a circuit diagram.
The process proved to be very long and painstaking, but also very rewarding. The steps presented here are not exact, and you will no doubt find your own way of working which is more effective in the case of any particular board. However, I believe the basic procedure is essentially correct for the majority of boards which are too complex to reliably hand trace. Without the need to invent the process, things should progress more quickly.
How to reverse engineer a schematic from a circuit board – [Link]
The world of electronics is moving further and further away from Through-Hole components and towards SMT (Surface Mount Technology) every day. Sometimes this doesn’t always go well for the enthusiasts building at home, so we have to adapt.
DIY SOIC to DIP Chip Adaptors – [Link]
Salvaging parts from old PCBs is one of the most important things that a hacker or a creative electronic enthusiast must have high in his agenda. I used to hack parts with the soldering iron, de-soldering pump and wick, but that is time-consuming and absolutely inefficient. Here is one cool (HOT) way to completely strip a PCB from it’s parts in no time, no matter how difficult it looks.
How to salvage parts from PCBs – [Link]
When you make PCBs with the toner transfer method, you have to spend around 10 minutes per board sweating over a hot clothes iron while the toner melts to the PCB.
Ahmad Tabbouch though a laminator might be an easier solution, but the default temperature is too low. This tutorial shows how to hack a cheap laminator to run hot enough for toner transfer.
Easy toner transfer PCBs with hacked laminator – [Link]
sponges writes: [via]
Though there are many Instructables on some aspect of how to make circuit boards, this one is different. This is also an instructable on how to make the things you need to make circuit boards, specifically, a flamboyant business card toy. Over the past six months I have set up fairly complete printed circuit board fabrication lab in my apartment, cheaply and safely, and I intend to cover all aspects of the process, from start to finish, in as wide a scope as I can. Some of it you may have seen before, but here it is all in one place, in detail, with references.
How-To: Set Up a Basement PCB Fab & Use It To Make a POV Business Card – [Link]