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EEVblog

David L. Jones

No Script, No Fear, All Opinion

education

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21:13

EEVblog 1678 – BEWARE of this Oscilloscope Triggering...

EEVblog ·

2025/04/04

Oscilloscope have a pre-arm trigger period that can cause confusion if you aren’t aware of it. And how different scopes operate and indicate this in different ways. Also some potential bugs in the Keysight 3000 and HD3 series scopes. 00:00 – Slow timebases can be problematic for triggering 02:13 – What happens when you press …

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13:47

EEVblog 1677 – An Interesting Effect with Fuses...

EEVblog ·

2025/03/31

An experiment to test an interesting effect with fuses. Forum: https://www.eevblog.com/forum/blog/eevblog-1677-an-interesting-effect-with-fuses-(experiment)/

en-US

16:07

EEVblog 1676 – Lab Timer HACK

EEVblog ·

2025/03/31

Modifying a lab timer to automatically trigger when a fuses blows, for automated fuse testing. Fuses video: https://www.youtube.com/watch?v=WG11rVcMOnY Jellybean Transistors: https://www.youtube.com/watch?v=XYdmX8w8xwI Forum: https://www.eevblog.com/forum/blog/eevblog-1676-lab-timer-hack/

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4:29

EEVblog 1675 – Corporate Enforced WASTE! Ninja...

EEVblog ·

2025/03/31

Our Ninja blender blade failed. For a warranty replacement they wanted us to DESTROY and DISPOSE OF the old perfectly working base unit before sending a new one. Let’s see about that… The first ever EEVBlog video with zero commentary, just memes. My breakfast smoothie: https://www.youtube.com/shorts/-2mf1mqZVQ0 Forum: https://www.eevblog.com/forum/blog/eevblog-1675-ninja-blender-repair-because-why-(right-to-repair)/ Credits: “Our Story Begins” Kevin MacLeod (incompetech.com) …

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11:41

EEVblog 1674 – Dumpster Diving HAUL!

EEVblog ·

2025/03/10

A big dumpster diving find! What did Dave score this time?

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9:10

EEVblog 1673 – JBL Partybox 310 Repair – Part 2...

EEVblog ·

2025/03/10

A quick follow-up to the JBL Partybox 310 speaker repair and speculation on WHY the fault happened the way it happened. Contains SPOLIERS, so watch Part 1 first! Forum: https://www.eevblog.com/forum/blog/eevblog-1672-jbl-repair-youll-never-guess-the-fault/

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46:58

EEVblog 1672 – JBL REPAIR: You’ll never guess the fault!

EEVblog ·

2025/03/04

Repair of a JBL Partybox 310 speaker. Follow along as Dave goes down the repair rabbit hole. Try and guess the exact fault before Dave does, it’s a doozy! 00:00 – JBL Partybox 310 Speaker fault symptoms and initial failure speculation 02:57 – Teardown 06:23 – Is it a firmware lockup issue? 07:17 – Checking …

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19:29

EEVblog 1670 – BM786 Multimeter BATTERY LEAKAGE...

EEVblog ·

2025/02/27

How can the same sh!t happen to the same guy twice? And a trap for young players with LCD’s. And a giveaway for the young whippersnapper in Australia. Forum: https://www.eevblog.com/forum/blog/eevblog-1670-bm786-multimeter-battery-leakage-repair-giveaway/ 00:00 – How can the same sh!t happen to the same guy twice? 06:27 – Zebra strip elastomeric connector 09:40 – It STILL doesn’t work? …

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14:46

EEVblog 1669 – Agilent U53131A VFD to LED Display...

EEVblog ·

2025/02/19

A mailbag replacement custom LED display for the Agilent U53131A VFD display frequency counter. www.hubequip.net Forum: https://www.eevblog.com/forum/blog/eevblog-1669-agilent-u53131a-vfd-to-led-display-upgrade-mailbag/

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19:19

EEVblog 1668 – HORRIFIC Alkaline Battery Leakage in...

EEVblog ·

2025/02/15

Horrific alkaline battery leakage in a rare prototype EEVblog 555 Multimeter. Can it be repaired? Forum: https://www.eevblog.com/forum/blog/eevblog-1668-horrific-alkaline-battery-leakage-in-rare-prototype-multimeter/

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21:39

EEVblog 1667 – Reverse Engineering the Brymen BM2257...

EEVblog ·

2025/02/15

Reverse Engineering the Brymen BM2257 Multimeter front end to understand what changes have been made from the BM235 in the Low Z mode. DaveCAD time. Also some testing of the LowZ mode and how it works. Forum: https://www.eevblog.com/forum/blog/eevblog-1667-reverse-engineering-the-brymen-bm2257-multimeter/ MOV datasheet: https://www.cnr.com.tw/cloudSpace/CNR_D.pdf How to reverse engineer: https://www.youtube.com/watch?v=lJVrTV_BeGg Multimeter Input Protection:

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15:59

EEVblog 1666 – Blown SMD Component Identification

EEVblog ·

2025/02/06

Let’s find out what this blown SMD part is, sent in by a viewer. Forum: https://www.eevblog.com/forum/blog/eevblog-1666-blown-smd-component-identification/ Component Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHtdQF-m5UFZ5GEjABadI3kI

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17:33

EEVblog 1665 – Keithley VFD REPAIR 2 – Electric Boogaloo

EEVblog ·

2025/02/06

Part 2 of the Keithley 2302 battery simulator repair of the VFD display. Just a follow-up on testing the actual VFD display itself to see if there is any fault that’s not the VFD vacuum. 00:00 – Having another look at the failed Newhaven VFD dispaly module 05:37 – Measurign voltages 07:32 – Oscilloscope probing …

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26:34

EEVblog 1664 – REPAIR with Junk Bin Parts! Keithley 2302

EEVblog ·

2025/02/06

Repair of a Keithley 2302 battery simulator with junk bin parts. But it did put up a fight! Teardown video: https://www.youtube.com/watch?v=5LK8wduZsy0 Forum: https://www.eevblog.com/forum/blog/eevblog-1664-repair-with-junk-bin-parts!-keithley-2302/ 00:00 – Faulty VFD display in a Keithley 2302 Battery Simulator 01:22 – Teardown 03:14 – The Display driver PCB 04:30 – Solder Sucking Sucks 05:26 – The VFD display module, a …

en-US

26:10

EEVblog 1663 – BM786 Multimeter REPAIR + InEr Error...

EEVblog ·

2025/01/24

Repairing a customers Brymen BM786 multimeter, and investigating the cause of the InEr error message on the input jack alert feature. Plus a giveaway to a local youngster. 00:00 – A returned BM786 Multimeter with InEr error message 03:23 – Split jacks and input alert circuit 05:19 – In-Circuit probing TIP and Low Ohms mode. …

en-US

31:18

EEVblog 1662 – Vintage Tandy 200 Portable Computer...

EEVblog ·

2025/01/24

This was going to be a repair of a vintage Tandy 200 Portable Computer… Forum: https://www.eevblog.com/forum/blog/eevblog-1662-vintage-tandy-200-portable-computer-claytons-repairteardown/ 00:00 – I sear this Tandy 200 had a problem… 02:54 – Teardown 03:57 – The new BM2257 Multimeter 05:25 – I think it’s the buzzer 08:06 – Microscope teardown 16:20 – They don’t make service manuals like they …

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12:10

EEVblog 1661 – AC Basics Tutorial Part 5: Time Domain...

EEVblog ·

2025/01/11

The difference between Time Domain and Frequency Domain in AC circuit analysis. AC Theory Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHvD6M_7WeN071OVsZFE0_q- Forum: https://www.eevblog.com/forum/blog/eevblog-1661-ac-basics-tutorial-part-5-time-domain-vs-frequency-domain/

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17:55

EEVblog 1660 – AC Basics Tutorial Part 4: Resistors,...

EEVblog ·

2025/01/05

Part 4 in the AC basics tutorial series. AC applied to resistors, capacitors and inductors, along with Capacitive Reactance and Inductive reactance. AC Theory Playlist

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31:29

EEVblog 1659 – Quick 861 Pro Hot Air Station REVIEW

EEVblog ·

2025/01/03

Review of the new Quick 861 Pro hot air station compared to the original 861DW. Forum: https://www.eevblog.com/forum/blog/eevblog-1659-quick-861-pro-hot-air-station-review/

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16:04

EEVblog 1658 – TUTORIAL: Mean vs Median

EEVblog ·

2024/12/28

It’s important to understand the difference between Mean and Median, not just for engineering, but for everyday life, so you don’t get manipulated by people with bad intentions. UBS Global Wealth Report: https://www.ubs.com/content/dam/assets/wm/global/insights/doc/global-wealth-report.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1658-tutorial-mean-vs-median/

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