What's inside a classic 1979 vintage Hewlett Packard HP41CV "halfnut" calculator?
Should Dave totally destroy it, or respect such a fine machine?
Forum: http://www.eevblog.com/forum/blog/eevblog-582-hp41cv-teardown/
Photos: http://www.eevblog.com/2014/02/18/eevblog-582-hp41cv-calculator-teardown/
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Fundamentals Friday
What is a Schmitt trigger and how does it work?
What is hysteresis?
And how do they fix two common problems in electronics, namely slow slew rate signals on CMOS digital chip inputs causing oscillation, and noise on comparator inputs.
The issues are demonstrated first on the breadboard, then the whiteboard explanation, and then the hysteresis fix is added and demonstrated.
And how are Schmitt Triggers physically implemented in CMOS logic?
Forum: http://www.eevblog.com/forum/blog/eevblog-941-the-amazing-schmitt-trigger/
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Dave plays with a little known EDA package from Japan.
This is NOT a review, it's just Dave mucking around.
Forum: http://www.eevblog.com/forum/blog/eevblog-968-mystery-eda-package/
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Dave looks at the $25 ANENG AN8008 Multimeter
It has some unusually low ranges making it ideal for electronics use. Or is it?
http://amzn.to/2tq68UO
Forum: http://www.eevblog.com/forum/blog/eevblog-1007-is-a-$25-multimeter-any-good/
Previous discussion: http://www.eevblog.com/forum/testgear/an8008-us-$19-10000count-1uv-0-01ua-0-01ohm-resolution-meter/
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An impromptu teardown on the Emona stand at the Electronex trade show, of the Picoscope 5000 flexible resolution USB oscilloscope, with a small crowd of EEVblog viewers watching on.
Also uses the Tagarno HD ZIP 40x digital magnifier.
http://www.tagarno.dk/en/frontpage/products/inspection/home/product-pages/products/digital-magnification-systems/magnus-hd-zip.aspx
https://secure1.bluecentral.com/emona/shop/scripts/prodList.asp?idCategory=84
http://www.picotech.com/document/datasheets/PicoScope5000Series.pdf
http://www.mouser.com/catalog/specsheets/DataSheetASD5020HS_v2.0.pdf
http://www.hittite.com/content/documents/data_sheet/hmc-ad1520.pdf
http://www.bizjournals.com/boston/blog/mass-high-tech/2011/01/hittite-microwave-buys-arctic-silicon-devices.html
Forum: http://www.eevblog.com/forum/blog/eevblog-521-picoscope-5000-usb-oscilloscope-teardown/
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Mystery Teardown!
What's got two pads and generates a Devo Energy Helmet waveform?
Forum: http://www.eevblog.com/forum/blog/eevblog-1008-mystery-teardown/
Previous teardown: https://www.youtube.com/watch?v=n47u2YQytjo&t=2s
Fluke Whitepaper: http://support.fluke.com/biomedical/download/asset/ppp085_impedance_educational.pdf
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