EEVblog #1085 – Bypass Capacitors Visualised!

An in-depth practical visualisation of how bypass capacitors work at both high and low frequencies.
Bulk decoupling capacitors vs bypass capacitors.
Capacitor placement and types are tested and the results examined.
How package inductance can have a large effect.
Loop area and what is means, it’s impact on EMC emissions, and how currents flow in ground planes is demonstrated

Links: http://web.mst.edu/~jfan/slides/Archambeault1.pdf

Forum HERE

from EEVblog https://www.eevblog.com/2018/05/19/eevblog-1085-bypass-capacitors-visualised/

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EEVblog #1083 – Pocket Multimeter Shootout

14 pocket multimeters from $8 to $65 are torn down and compared for feature set and build quality.
Ranging in price from $8 to $65, which one is the best in each price category?
Part 2 coming tomorrow.
Timestamps:
6:07 XB866 Wun Hung Lo
9:42 ANENG AN8203
15:47 $10 Shootout Summary
16:14 Uni-T UT10A
19:12 Uni-T UT120B/120C
22:41 UNI-T Shootout Summary
23:05 Jaycar QM1544
26:42 $20 Shootout Summary
27:06 Sanwa PM3
31:06 Brymen BM22 / Amprobe PM51
37:31 Kyoritsu KEW1018
42:01 Hioki 3244-50 CARD Tester
45:47 Amprobe DM78C
50:25 DER EE DE-19S
56:27 SANWA PM300
1:02:36 Conclusion

Use coupon code “pocket” for a big discount on the PM300

Forum HERE

from EEVblog https://www.eevblog.com/2018/05/19/eevblog-1083-pocket-multimeter-shootout/

Researchers deploy polarization camera for carbon fiber inspection

To avoid safety risks, quality assurance is essential in the production of parts made from carbon fiber reinforced polymers (CFRP). These components exhibit particularly high tensile strength in the direction of the fibers, so manufacturers must pay close attention to the direction in which the various plies are formed together during the production process. To inspect carbon fiber components, researchers from the Fraunhofer Institute for Integrated Circuits IIS have deployed a polarization camera.

from Factory Automation https://www.vision-systems.com/articles/2018/05/researchers-deploy-polarization-camera-for-carbon-fiber-inspection.html