Showing posts with label PCB-Layout. Show all posts
Showing posts with label PCB-Layout. Show all posts

Friday, June 03, 2016

Successful PCB Grounding - Mark Fortunato

This tutorial discusses proper printed-circuit board (PCB) grounding for mixed-signal designs. For most applications a simple method without cuts in the ground plane allows for successful PCB layouts with this kind of IC.

Successful PCB Grounding - Mark Fortunato

"Ground Is Not an Equipotential - At this point it is important to understand that a ground plane, despite what we were taught it EE101, is not an equipotential. First of all, no matter how thick the copper is for your ground plane, it does have resistance. Therefore, if the analog and digital return currents (or any two currents) share a portion of the ground plane (i.e., their currents flow through the same metal) there will be crosstalk between the two as the copper resistance causes IR voltage drops."

Successful PCB Grounding - Mark Fortunato

"With the basics of current flow on a PCB understood, we can start using this knowledge to properly handle the grounding of mixed analog-digital ICs. Ultimately, the goal is to ensure that the digital and analog currents do not share portions of the same return path."

"Many problems with mixed-signal PCB design can be avoided by following this simple advice: pay attention to where the current flows. For most cases all we have to do is remember two basic principles: DC and low frequencies flow mostly in the straight-line path of least resistance between source and load; and high-frequency signals follow the path of least impedance, which is directly under the signal trace. In-between frequencies flow by both paths and in between the two paths."

Wednesday, July 08, 2015

Electronics Design - AirBorn Electronics

They design and produce the electronic controllers inside new products. Electronic development, circuit design, PCB layout, prototyping, programming, these are the parts of Electronics Research and Development to bring a new idea or concept to life.

Electronics Design - AirBorn Electronics

See the guidelines for writing a project spec and further understanding the creative process.

AirBorn Electronics

Electronics Design - AirBorn Electronics

Coal face measurement product software being modified/tested on a mockup - The A-frame shaped unit is under test, the remainder is test equipment

Circuit Design Library - AirBorn Electronics

Thursday, October 11, 2012

Build Electronic Circuits Like a Pro

If you want to build electronic circuits, you need to connect the components of your circuit somehow. If you expect to make your circuit work more than just a few times, you need a solid way of connecting them. You need to create a printed circuit board (PCB).

"I started playing with electronics as a hobby when I was 14. Since then I have finished a Master's degree and founded two electronic design companies."

Build Electronic Circuits Like a Pro

Build Electronic Circuits Like a Pro

The radar sensor uses a Ultra-Wideband (UWB) chip from Novelda. It sends out electromagnetic pulses and analyzes the pulses that are reflected back. In the video above, a part of the electromagnetic pulse will be reflected back when it hits the wall and a part of it penetrates the wall and is reflected from the cabinet behind the wall.

Radar Circuit Enables See-through Wall Robot

delabs Notes

This is a nice Educational Website built by Oyvind from Norway. Only when we read and learn from the experience and views of others, our brain opens up to new ideas and we develop a wide perspective.

Monday, July 11, 2011

See a 3D View of your Eagle Cad Layout

With Eagle3D it is possible to generate a 3D View from your Board Layout. This will help you iron out mechanical clashes, thermal conflicts. Serviceability and Accessibility issues too.

See a 3D View of your Eagle Cad Layout

On Panel PCB's Like front/back panels. Usability errors may become visible in this simulation. Connector and wiring layout can be better judged on 3D and strain relief and cable management can be planned in power electronics designs.

In sensitive analog circuits; thermal, leakage or guard rings can be inspected. In RF circuits; the shielding, tracks and components can be studied for unwanted coupling, crosstalk or leakage. Finally safety factors also can be judged keeping the enclosure 3d or cabinet in hand.

Now we have low cost 3D CNC prototype makers. Rapid prototyping - additive or laser erosion. You can probably use this as a input for such a machine. Then you can fix it in a cabinet and complete the Mechanical Simulation. This will save wastage of parts, time and pcb's during prototyping.

Arthernet - AVR Ethernet Modul
A 3D Simulated View from Guido Fischer. More information about this board in German at Arthernet - AVR Ethernet Modul

Tuesday, February 16, 2010

Luciani.org - EDA and Design Notes

Noise Measurement - To accurately measure noise (or high frequency signals) with your oscilloscope it is necessary to reduce the radiated noise that is coupled to your probe.
Luciani.org - EDA and Design Notes
The gEDA project is a set of tools for electrical circuit design, schematic capture, simulation, prototyping, and production. The PCB project contains a tool for printed circuit board layout.

Luciani.org - EDA and Design Notes

Breadboard Basics from Luciani
John Luciani explains how to prototype a circuit to try out a concept.

Monday, May 04, 2009

FreePCB - PCB editor

FreePCB - PCB editor

FreePCB is a free, open-source PCB editor for Microsoft Windows, released under the GNU General Public License. It was designed to be easy to learn and easy to use, yet capable of professional-quality work. It does not have a built-in autorouter, but it can use the FreeRoute web-based autorouter at freerouting.net. Some of its features are:
  • 1 to 8 copper layers
  • Board size up to 60 inches by 60 inches
  • Uses English or metric units (i.e. mils or mm) for most functions.
  • Footprint libraries courtesy of Ivex Design International Inc.
  • Copper fill areas
  • Footprint Wizard and Footprint Editor for creating or modifying footprints
  • Imports and exports PADS-PCB netlists
  • Exports extended Gerber files (RS274X) and Excellon drill files
  • Design rule checker
  • Autosave
Example - Logic Analyzer: This is an open-source logic analyzer called MiniLA contributed by Bob Grieb of the User Forum. The image on right is the Logic Analyzer PCB.

miniLA - mini Logic Analyzer

Some Features:
  • Up to 32 channels
  • 128 Kb of memory for each channel
  • Sampling rate up to 100 MHz (timebase in 1-2-5 sequence)
  • Input levels compatible with 3.3V and 5V logic
  • Selectable pretrigger/posttrigger buffer size in 8K step