EEVblog

By David L. JonesTechnology Education

EEVblog episodes

August 10, 2023 EEVblog 1559 – PCB Design: Trace Current Rating
Dave answers a Twitter question: How should I design a PCB trace to carry 80A of current, and can this be done on one PCB layer? The answer is, well, complicated. Let’s go down the PCB design rabbit hole of current rating PCB traces.
Designing a PCB trace for 70-80A.
How should I design the trace from the connectors to a Mosfet(THT) device for this current rating?
Is it possible to use only one layer?@eevblog
— Abhinav Chinnusamy (@abhinav_937) August 8, 2023
PCB Design Video Playlist: https://www.youtube.com/playlist?list=PL8D3B363139B67FF3
Forum: https://www.eevblog.com/forum/blog/eevblog-1559-pcb-design-trace-current-rating/
00:00 – Twitter question: How should I design a PCB trace to carry 80A of current
01:09 – Ohms law and copper losses
02:06 – PCB Trace calculator
02:45 – The three (four) major factors to PCB current handling calculations
02:54 – Trace Width and Copper thickness (weight) and PCB stackups
04:18 – A trap with Multilayer PCB designs
05:20 – External vs Internal layer matters with thermal design
06:20 – What happens if you exceed the maximum current rating?
07:23 – PCB plating matters
08:12 – Electrical vs Thermal design considerations
09:30 – 1oz copper vs 2oz vs 4oz
10:35 – Solder and tin plated traces
11:37 – Let’s look at what a PCB manufacturer offers, HASL, SMOBC, ENIG etc
12:46 – How do you get your PCB traces plated in your design?
14:31 – Those are rookie temperature numbers, you gotta pump those up!
14:51 – The IPC 2152 and IPC 2221 standards are a bit How’ya’Doing
16:30 – The physical and thermal part of your product design matters
16:47 – Thermal conduction to planes matters
19:30 – Does VIA stiching matter?
20:30 – Have you considered a Bus Bar?
21:56 – We can get 80A on a single PCB trace, BUT…
23:18 – Can I interest you in bodge wire Sir? It’s complete legit.
24:17 – PCB Standard WARS!
26:19 – Forget about etch factor
27:08 – Internal vs External trace calculations
30 min
August 10, 2023 EEVblog 1558 – Mailbag
More random mailbag! PocketFrog: https://standardmeasurement.us/ Omnifixo Maker’s Third Hand: https://kandaelectronics.com.au/products/omnifixo-of-m4-makers-third-hand NASA Red Crew: https://www.nasa.gov/feature/artemis-red-crew-team-helps-enable-successful-launch/ https://caberqu.com/ https://github.com/DanInvents/Rockit/ 00:00 – Mailbag 00:42 – PocketFrog USB Lab in your pocket 22:40 – Omnifixo OF-M4 Magnetic PCB Holder 28:32 – NASA Artemis 1 Red Crew – Billy Cairns 30:36 – Caberqu C2C USB-C Cable Tester 39:30 – Rocket Rocket-Operation …
47 min
August 03, 2023 EEVblog 1557 – Micsig SigOFIT Optical Fibre Probe + GaN Experiment
Review of the new Micsig SigOFIT Optical Fibre oscilloscope probe, including a practical demonstation of the incredible CMRR range of opticallly isolated probing of a 300V GaN transistor driver circuit. And a direct comparison with the HVP-70 high voltage differential probe to show you the incredible game changing difference optical fibre probes make. https://www.micsig.com/SigOFIT/ CMRR …
39 min
August 03, 2023 EEVblog 1556 – SolaRoad Solar Cycleway FAILS, AGAIN!
To everyones shock, a SolaRoad cycleway installation in Maartensdijk in Utrecht province of the Netherlands only produed 26% of it’s projected output, AGAIN! When will this nonsense stop? Links:https://nos.nl/artikel/2484255-innovatief-zonnefietspad-bij-maartensdijk-levert-bijna-niets-op https://www.dutchnews.nl/2023/07/solar-bike-path-fails-to-meet-electricity-targets-again/ https://www.wattisduurzaam.nl/37168/energie-beleid/utrechts-zonnefietspad-op-koers-voor-40-van-beoogde-opbrengst/ https://www.wattisduurzaam.nl/16140/energie-opwekken/7-veelbelovende-innovaties-die-de-transitie-geen-steek-verder-helpen/ https://twitter.com/WattisDuurzaam/status/1525171198052782090 https://www.businessinsider.com/worlds-first-solar-road-turned-out-colossal-failure-2019-8 https://www.archpaper.com/2015/07/bike-path-pieces-skeptics-dismiss-dutch-solar-bike-path-solaroad-inefficient-cash-grab/ Solar roadways BUSTED Playlist: https://www.youtube.com/playlist?list=PLzET2ZHWnFA-6fnJu8WAhKmIruWDp8CQr Forum: https://www.eevblog.com/forum/blog/eevblog-1556-solaroad-solar-cycleway-fails-again!/
15 min
June 13, 2023 EEVacademy | Digital Design Series Part 5 – Karnaugh Maps
Digital logic circuit simplification using Karnaugh Maps. How to use a visual method to solve boolean algebraic equations and truth tables. Part 5 of the digital logic design tutorial series. Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHs2LwEdDwTp3n7mxb-MyBbo Forum: https://www.eevblog.com/forum/blog/eevacademy-digital-design-series-part-5-karnaugh-maps/ 00:00 – Part 5 of the digital logic design tutorial series 02:15 – Solving a logic truth table algebraically 04:17 – …
29 min
June 13, 2023 EEVblog 1547 (Part 3) – Tour of the NASA Canberra Deep Space Communications Complex
Part 3. Tour of the NASA Canberra Deep Space Communications Complex at Tidbinbilla, with Richard Stephenson https://twitter.com/nascom1 Links: GaN solid state amplifier: https://ntrs.nasa.gov/api/citations/20190028651/downloads/20190028651.pdf Deep Space Network information https://descanso.jpl.nasa.gov/monograph/series10/03_Reid_chapt3.pdf https://descanso.jpl.nasa.gov/monograph/series10/04_Reid_chapt4.pdf https://descanso.jpl.nasa.gov/monograph/series10/05_Reid_chapt5.pdf Air exclusion zone: https://www.avsef.gov.au/sites/default/files/2023-03/documents/nsw-act-nat_r430_tidbinilla_increase_in_transmitting_power_0.pdf Maser amplifier: https://ntrs.nasa.gov/api/citations/19940025169/downloads/19940025169.pdf X band uplink: https://ipnpr.jpl.nasa.gov/progress_report/42-87/87O.PDF 34M Beam Waveguide antenna: https://descanso.jpl.nasa.gov/monograph/series4/Mono4_Ch6.pdf https://descanso.jpl.nasa.gov/monograph/series4/Mono4_Ch7.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1547-contacting-the-voyager-2-space-probe/ 00:00 – Tour of the NASA …
28 min
June 07, 2023 EEVblog 1547 (Part 2) – PINGing the Voyager 2 Space Probe!
Part 2 – PINGing the Voyager 2 space probe. Inside the control room at the Canberra Deep Space Communications Complex (CDSCC) while receving the Voyager 2 signal after a 30 hour PING time. A detailed look at the receiver control system screens. Follow Richard Stephenson on Twitter: https://twitter.com/nascom1 Forum: https://www.eevblog.com/forum/blog/eevblog-1547-contacting-the-voyager-2-space-probe/
13 min
June 07, 2023 EEVblog 1547 – Contacting the Voyager 2 Space Probe PART 1
How do you contact the Voyager 2 space probe? PART 1: A detailed explanation by Richard Stephenson from the NASA Canberra Deep Space Communications Complex in Canberra on how the 70m DSS-43 dish at the CDSCC is used to still contact the Voyager 2 probe. You can follow Richard on Twitter: https://twitter.com/nascom1 NOTE: This video …
20 min
May 19, 2023 EEVblog 1544 – Platio Solar Pavement BUSTED!
Let’s BUST the new Platio Solar Pavement installation in the Netherlands using thier OWN production data on launch day! LOL PLUS a Solar Roadways UPDATE! If you find my videos useful you may consider supporting the EEVblog on Patreon 00:00 – Platio Solar Pavement in the Netherlands BUSTED! 02:15 – The launch day unveiling video …
20 min
May 17, 2023 Talking with Steve Sanghi. 31 years as CEO of Microchip
atching up with Steve Sanghi who was Microchip CEO for 31 years, now Executive Chair. Check out his new book, Up and to the Right. How Microchip was built into one of the biggest and most pofitable chip companies in the world. This is copied from The Amp Hour podcast, as it shuld be of …
1 hr 7 min