EEVblog

Dave explains, shows, and measures a potentially big trap with using high value ceramic capacitors. If your 10uF capacitor really 10uF in your circuit? Those humble X7R caps you think are a “stable” dielectric? think again… Class II and above ceramic capacitors can vary their capacitance drastically with DC bias voltage level and also the applied AC voltage. Links: http://www.murataamericas.com/murata/murata.nsf/promo_dcbias.pdf http://www.avx.com/docs/masterpubs/mccc.pdf http://www.ece.ucdavis.edu/vcl/asap/asap_v1/docs/X7R_C.pdf http://psearch.murata.com/capacitor/product/GRM21BR60J106KE19%23.html http://www.murata.com/products/design_support/simsurfing/outline.html http://www.avx.com/SpiApps Capacitor Tutorial – Ceramics & Impedance The piezoelectric effect demonstrated Forum HERE

Dave tears down Sony’s first digital camera that used removable media, a 3.5″ floppy drive! The 640×480 resolution 0.3Mpixel 1997 vintage Sony Mavica MVC-FD7 Original photos form the camera are HERE Datasheets: MB88146AP UPD72069 Floppy-Disk Controller AD9801 CCD image sensor processor MB90089 OSD SH7032 32 Bit Microcontroller: MB3785A Switching Regulator Forum HERE High resolution teardown photos:

EEVblog2 2nd Youtube Channel: And Engineers Guide To Solving Problems BOOK https://www.youtube.com/user/trombonista92 A really crappy line tracer circuit patent Geppetto Electronics LCDuino RGB backpack TmpUSB temporary USB drive: PIC Development Boards https://www.youtube.com/user/BoomBrush Sony Mavica 3.5″ Floppy Drive Digital Camera X-Core 16 Core 1000MIPS Analog Slice Kit:

Want to see through a visually opaque material? it’s easy with a thermal imaging camera and a bit of physics. Dave also follows up on the cling wrap ESD issue with some measurements and alternatives. Previous video – How To See Through Objects With A Thermal Camera Anti-static bag myth Forum HERE

Dave shows you a handy tip on how to see *through* your product using a Flir thermal imaging camera with the cover *on*. Thus being able to maintain the correct airflow, whilst at the same time being able to view the thermal map as if the cover was off! Forum HERE

Part 2 of repairing the Stanford Research SR650 8 pole Programmable elliptical filter. Mains Filter datasheet Partial schematic Forum HERE

Dave scored a cheap non-working Stanford Research SR650 8 pole programmable elliptical filter on ebay. Can it be fixed? Forum HERE

See the EEVblog lab LIVE Panasonic KX-TVP100AL Voice Processing System: Panasonic KX-TD816AL Digital Super Hybrib System PABX Installation Manual NEC Zen Alpha Datasheets: 3W isolated DC DC converter MT8952 HDLC Protocol Controller MC14LC5480 PCB Codec Filter MT8941 T1/CEPT Digital Trunk PLL MT8952 HDLC Protocol Controller Forum HERE

Mailbag Monday SPOILERS and links to thinks in this this mailbag: Philips XX 1080 nigh vision image intensifier tube Pimoroni Pirate Crew Pibow Raspberry Pi case Audiovox CDM-9000 Tri-Band mobile phone https://www.youtube.com/user/channelengineer PICcell 12F PCmicro breadboard module Zipip Wireless Messenger 2 Forum HERE

Dave shows how Tektronix digital oscilloscopes work fundamentally different in their Auto trigger mode from other brands. And also some random ad-hock comparisons between the Tektronix MDO3000, Agilent MSOX3000, Rigol DS2000, and GW Instek GDS-2000A oscilloscopes. Forum: http://www.eevblog.com/forum/blog/eevblog-617-tektronix-oscilloscope-anomaly/

Doug Ford, former head designer at Rode Microphones explains 48V phantom powering of microphones and how it works. There is a ton of stuff here: Electrostatic and electromagnetic noise, differential amplifiers, common mode noise, transformer magnetisation current, JFET differential driver circuits, balanced impedances, phase splitters, miller capacitance and how it matters, and he explains how the Schoeps amplifier topology works. Forum HERE

Dave walks around Cebit Australia 2014 at Homebush Bay in Sydney. Show highlights footage HERE If you don’t like shaky hand held walking footage, motion blur, or camera image stabilisation, don’t watch it, no complaints. I do not have a steadycam, and I don’t want advice on a steadycam, and I don’t care how much you can’t watch it. Thanks. Forum HERE

Dave checks the Dallas DS1220Y chip in the Prema 6047 7.5 digit multimeter to see if the battery is dead, and if the calibration constants have been lost. ROM is HERE Previous video HERE Forum HERE

Dave attended the Cebit 2014 event in Sydney at Homebush Olympic Park. Here are some highlights. The EX¹ the worlds first PCB printer. It prints silver conductive ink onto FR4, paper, mylar, or many other types of substrate. GoFar, a wireless car monitoring startup. The University of Newcastle Robotics group NuBots Showcasing the robots used in the RoboCup challenge. Forum HERE

Teardown Tuesday. What’s inside a 1980′s vintage 8.5 digit multimeter, the 6047 from Prema. Or did Dave diddle himself? Forum HERE EDC Voltage Standard Calibration Check User manual High Res Photos: