Month: February 2022

Muddy Waters

Jovan Stosic February 23, 2022

https://en.wikipedia.org/wiki/Muddy_Waters

McKinley Morganfield (April 4, 1913 – April 30, 1983),[1][2] known professionally as Muddy Waters, was an American blues singer-songwriter and musician who was an important figure in the post-war blues scene, and is often cited as the “father of modern Chicago blues.”[3] His style of playing has been described as “raining down Delta beatitude.”[4]

Muddy Waters grew up on Stovall Plantation near Clarksdale, Mississippi, and by age 17 was playing the guitar and the harmonica, emulating the local blues artists Son House and Robert Johnson.[5] He was recorded in Mississippi by Alan Lomax for the Library of Congress in 1941.[6][7] In 1943, he moved to Chicago to become a full-time professional musician. In 1946, he recorded his first records for Columbia Records and then for Aristocrat Records, a newly formed label run by the brothers Leonard and Phil Chess.

In the early 1950s, Muddy Waters and his band—Little Walter Jacobs on harmonica, Jimmy Rogers on guitar, Elga Edmonds (also known as Elgin Evans) on drums and Otis Spann on piano—recorded several blues classics, some with the bassist and songwriter Willie Dixon. These songs included “Hoochie Coochie Man,” “I Just Want to Make Love to You” and “I’m Ready“. In 1958, he traveled to England, laying the foundations of the resurgence of interest in the blues there. His performance at the Newport Jazz Festival in 1960 was recorded and released as his first live album, At Newport 1960.

Muddy Waters’ music has influenced various American music genres, including rock and roll and rock music.

Muddy Waters was last modified: February 23rd, 2022 by Jovan Stosic

Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA

Jovan Stosic February 18, 2022

Change the design rule, not your vias!. Just go into your Design Rule… settings and lower the via diameter and drill sizes by a fraction (for example, .6mm and .304mm) such that they are slightly smaller than whatever you already placed on your board. Your vias will then nicely exceed the minimum and all the errors will go away.

 

Source: Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA

Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA was last modified: February 18th, 2022 by Jovan Stosic

Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA

Jovan Stosic February 17, 2022

The quick way:

  1. Before you start your design, go to:

https://easyeda.com/order

  1. Click on the question mark next to “Layers”;
  2. Read the page that opens;
  3. Select 4 or 6 layers;
  4. Click on the question mark next to “Impedance”;
  5. Read the page that opens;
  6. Select “Yes”;
  7. Click on “Impadance calculator”;
  8. Choose your desired transmission line structure (single ended or differential covered microstrip, inner layer stripline, offset stripline);
  9. use the calculator and note the trace dimensions.
  10. Following the Design Flow in the Tutorial, start your design in the Schematic Editor of EasyEDA and then convert it to a PCB, then manually route your layout using the calculated trace dimensions.

The longer way for 4 and 6 layer PCBs only:

  1. Before you start your design, read “Controlled Impedance PCB” in:

https://jlcpcb.com/capabilities/Capabilities;

  1. Choose your PCB stack up:

https://jlcpcb.com/quote/pcbOrderFaq/PCB%20Stackup

or:

https://jlcpcb.com/client/index.html#/impedance;

  1. Choose your desired transmission line structure (single ended or differential covered microstrip, inner layer stripline, offset stripline);
  2. then use:

https://jlcpcb.com/client/index.html#/impedanceCalculation

  1. use the calculator and note the trace dimensions.
  2. Following the Design Flow in the Tutorial, start your design in the Schematic Editor of EasyEDA and then convert it to a PCB, then manually route your layout using the calculated trace dimensions.

The more detailed and flexible way but which will not be covered by any warranty from JLCPCB:

  1. Install a copy of a simple field solver impedance calculator:

https://www.maartenbaert.be/alterpcb/tlinesim/
https://sourceforge.net/projects/mdtlc/files/development/0_2_1_dev/
or:
https://sourceforge.net/projects/mmtl/files/tnt/1.2.2/

  1. Choose your PCB stackup:

https://jlcpcb.com/client/index.html#/impedance

  1. Then use their figures as inputs to the field solver to calculate the trace widths and spacings for your desired transmission line structure (bare microstrip, covered microstrip, buried microstrip, symmetrical stripline, offset stripline, differential variants of microstrip and striplines,coplanar wiveguide, etc. etc.)
  2. Note the trace dimensions.
  3. Following the Design Flow in the Tutorial, start your design in the Schematic Editor of EasyEDA and then convert it to a PCB, then manually route your layout using the calculated trace dimensions.
  • Note that:

(i) for 2 layer PCBs the information provided about the PCB material is incomplete;
(ii) using tools and stack ups other than those specified by JLCPCB will almost certainly void any claim against them for the resulting PCB failing to the target impedance.

 

Source: Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA

Forum – EasyEDA – An Easier Electronic Circuit Design Experience – EasyEDA was last modified: February 17th, 2022 by Jovan Stosic

JLCPCB’s Basic vs Extended

Jovan Stosic February 11, 2022

There’s a subset of JLCPCB’s parts that they call Basic parts. All other parts they support are called Extended parts. Basic components have a cost per unit. For each type of Extended component you use, JLCPCB adds $3 to your total cost. If you aren’t careful, this can really add up. For example, if your board needs 10 different types of resistors, and you choose Extended components for these, then you’ll end up paying $30 in fees on top of your per-component and assembly costs.

I found the best way to make sure I was choosing Basic parts was to use JLCPCB’s parts page instead of trying to do it entirely through the Library. In EasyEDA’s Library pane, you can filter for JLCPCB Assembled components, and sort by the SMT Type column, but I found that this was sometimes out of sync with JLCPCB’s parts database, so you may not find parts that JLCPCB actually has, or they may tell you something is Extended when it’s actually Basic. To avoid that, just go to the JLCPCB parts page and browse or search for what you’re looking for, then filter for Basic Parts.

source: http://www.evankrall.com/posts/jlcpcb-smt/

JLCPCB’s Basic vs Extended was last modified: February 12th, 2022 by Jovan Stosic