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Copyright © David L. Jones 2013
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No Script, No Fear, All Opinion
487 Episodes
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How much capacity has this 20+yo 1000+ cycle Panasonic 14500 lithium ion battery lost? 00:00 – Panasonic electronic shaver teardown 06:30 – Battery dimensions match the type number 08:24 – The battery capacity test setup 10:40 – 500mA Constant Current test 11:38 – How much energy is left in a “flat” battery? 13:46 – 250mA …
The $50 Ziboo 17B Pro 1500V Multimeter vs the $150 Fluke 17B MAX Is it any good? Forum: https://www.eevblog.com/forum/blog/eevblog-1731-$50-ziboo-17b-pro-multimeter-vs-$150-fluke-review/
Part 8 of the AC Basics tutorial series. Looking at the difference between Apparent, Reactive, and Real Power. Plus Power Factor 00:00 – Voltage & Current phase relationship 02:28 – Real Power 07:09 – Apparent Power 12:02 – Power transmission systems and copper losses 17:45 – Reactive Power 20:17 – It’s all a Fugazi, it …
Ohms law applied to AC. AC Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum: https://www.eevblog.com/forum/blog/eevblog-1729-ac-basics-tutorial-part-7-ac-ohms-law/
Part 6 of the AC basics tutorial video series, covering Impedance, Conductance, Susceptance, and Admittance. 00:00 – AC Tutorial Series Part 6 00:56 – Impedance 07:32 – Reactance vs Impedance 08:17 – Conductance 11:21 – The Fluke 87V measures conductance! 12:12 – Susceptance & Admittance 13:53 – Tying it all together AC Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- …
Simple repair of a Casio CT-X700 keyboard, with Sagan, and some really bad music. Forum: https://www.eevblog.com/forum/blog/eevblog-1727-repair-casio-ct-x700-keyboard/
Repairing a failed EV charger DC-DC converter had an unusual twist. Forum: https://www.eevblog.com/forum/blog/eevblog-1726-repair-of-an-ev-charger/
Sagan joins Dave to open more packages, in everyone’s favorite segment Mailbag. 00:00 – The Connector Book! by Davide Andrea https://connectorbook.com/ Listen to Davide on The Amp Hour: https://theamphour.com/708-all-the-connectors-with-davide-andrea/ 11:02 – BLE CaberQu USB-C cable tester https://caberqu.com 22:02- Teardown of the CaberQu 24:22 – Snaptron FREE Sample Box https://www.snaptron.com/free-samples/sample-box/ 24:55 – Sagan’s Knife Skills! 32:10 …
Teardown of the classic Australian Made BWD 603B Minilab that was saved from the UTS dumpster. Schematic: Forum: https://www.eevblog.com/forum/blog/eevblog-1724-bwd-603b-minilab-retro-teardown/
Review of the AlienTek DM40 Multimeter/Oscilloscope 00:00 – Alientek DM40C Multimeter and Oscilloscope 02:12 – Unboxing 03:51 – What’s with the rotating tilting bail? 06:15 – Power on 08:53 – The Trend Chart is really nice 10:19 – Online/Offline mode, what IS this? 11:58 – Banana jacks please 12:07 – Megaohms interference issue 13:20 – …
Re-telling of a manufacturing hardware war story talk I gave at a recent hardware meetup in Sydney. https://luma.com/Sydney-hardware-meetup?k=c How a simple manufacturing change cost a company millions of dollars. 00:00 – Sydney Hardware Meetup 01:16 – Seismic Oil Survey Exploration: How to find oil 03:29 – Seismic survey vessels are HUGE! 04:25 – Solid Towed …
Qualcomm have bought out Arduino, and several weeks later have altered the Terms & Conditions. Dave does a deep dive of the changes. https://www.arduino.cc/en/terms-conditions/ https://web.archive.org/web/20250912221625/https://www.arduino.cc/en/terms-conditions/ 00:00 – Qualcomm have acquired Arduino. I’ve got a bad feeling about this… 01:02 – How much did they pay for Arduino? 02:54 – They have changed the Terms And …
More mailbag! 00:00 – Biggest mailbag load EVER. Too much random vintage USSR stuff to list… 26:24 – Logicgat Digital Logic training board. https://logicgat.es/ 31:22 – SLogic16U3 $69 USB3 800MHz Logic Analyser https://wiki.sipeed.com/hardware/en/logic_analyzer/slogic16u3/Introduction.html Forum: https://www.eevblog.com/forum/blog/eevblog-1720-mailbag-ussr-bonanza-logic-training-$69-logic-analyzer/
Expanding the AERL home storage battery from 25kWh to 75kWh! Also replacing the 5kW Deye hybrid inverter with an 8kW Solis hybrid inverter. And installing a changeover switch to power most of the house from the Backup port in the new inverter. https://www.aerl.com.au/products/life2-battery https://www.thomsonenergy.com.au/ Solis s6-eh1p8k-l-plus-au https://www.solisinverters.au/uploads/files/202506/Solis_Manual_S6-EH1P(3-8)K-L-PLUS_AU_V1,1(20250530).pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1719-75kwh-home-storage-battery-expansion/ 00:00 – 75kW Battery Expansion 05:11 …
What use is a 1GHz oscilloscope if it doesn’t have a high frequency active probe interface? Well, there are several options including a cheap $5 DIY resistive probe. Practical demonstration of active FET probing vs Passive Probing vs DIY Resistive probing. A lot of material extracted from videos 1367 and 1368 Forum: https://www.eevblog.com/forum/blog/eevblog-1718-is-a-cheap-1ghz-oscilloscope-useless-($5-diy-1ghz-resistive-prob/ 00:00 – …
Rigol have released the new MHO900 series mixed signal oscilloscope. For $999 entry level MHO934 you get 4CH 350MHz 12 bit at 4Gs/s, this is insane! Teardown of the special edition 1GHz MHO98 (still only $1399!) https://www.rigol.com/intl/products/oscilloscope/MHO900.html https://www.rigolna.com/products/digital-oscilloscopes/mho900/ In Australia: https://emona.com.au/quick-links/rigol/ 00:00 – Special Limited Edition MHO98 01:07 – DHO900 vs MHO900 03:06 – Is …
A viewer went dumpster diving at the University of Technology and found some classics. Teardown and playing with a Kikusui DSS5040 Analog/Digital Storage scope. Plus a classic Australian BWD 603B Mini-Lab Manual: https://www.eevblog.com/files/Kikusui_DSS5040_E.pdf 00:00 – University Dumpster diving time! 02:46 – Kikusui DSS5040 Analog/Digital storage oscilloscope 07:12 – Teardown 10:51 – Power On 17:14 – …
Swiss company Euler Precision have a new 3GHz active probe on Crowd Supply, let’s take a look. https://www.crowdsupply.com/euler-precision/esap-30 00:00 – The Euler Precision eSAP-30 Active Probe 01:26 – The problem with passive probes, Capacitance Reactance 03:31 – Unboxing 05:55 – Open Source? 06:46 – It’s all about the probe accessories 08:08 – Measurement report 10:02 …
Classic intermittent “popping” noise from this Presonus Eris 5 studio monitor speaker. Electrolytic Capacitors are suspect number one. 00:00 – Faulty Presonus Eris 5 speaker. Classic “popping” sound. 03:48 – Teardown 07:16 – Testing for popping again 07:36 – Testing for hiss 08:32 – Rectified voltage testing 09:34 – Woah, that’s that? 10:26 – Getting …
A look at the crazy ferrite core density in the Ampex 1600 16k x 18 bit word magnetic core memory from Ampex Memory Products Division, used in the Mitra 125S computer for the Spacelab program on the Space Shuttle. 00:00 – Magnetic core memory 01:52 – How magnetic core memory works 07:12 – Ampex high …
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