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Sharp GF-7600 Boombox Repair Part 2 Electric Boogaloo
Dismantling, cleaning and fixing the dodgy mains switch contact.

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#ElectronicsCreators #Repair
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Bodge repairing THE boombox of the 1980's, the Sharp GF-7600 for a 1980's party.

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#ElectronicsCreators #Repair
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Demo, teardown and reverse engineering of the Tolicore 3720 Femtoammeter and voltage source.
https://tolicore.com/products/3720-femtoammeter-voltage-source/
https://tolicore.com/product-documents/3720-Datasheet.pdf
Keithley low current measurement handbook: https://www.tek.com/en/documents/product-article/keithley-low-level-measurements-handbook---7th-edition
Counting LED photons video: https://www.youtube.com/watch?v=TJcMgoJ4DOE

00:00 - Femtoammeter measurement
01:16 - Tolicore 3720 Femtoammeter unboxing
03:39 - Power on and UI
05:18 - 20pA full scale range
10:13 - Bluetooth and
11:35 - Humidity measurement is important
12:21 - Crazy sensitive!
13:45 - LED as a current source demo
15:28 - 1nA measurement test
16:43 - Burden voltage and electrometer input + self calibration
20:14 - Teardown
22:20 - Voiding the warranty
25:05 - Reverse engineering
27:32 - How a PCB guard ring works
33:52 - Humidity matters
34:33 - The voltage output
35:23 - Porcelain Multilayer Capacitors
36:22 - Voltmeter input
38:24 - Potentiostatic and Amperostatic Coulometry
40:15 - ADA4530-1 Internal schematic
42:25 - Contamination and PCB assembly cleaning matters
44:03 - Rogers PCB material

Forum: https://www.eevblog.com/forum/blog/eevblog-1755-tolicore-femtoammeter-teardown-reverse-engineer/

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#ElectronicsCreators #Teardown
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The EEVblog is HIRING! Will you be Dave's next sidekick?

Job Description: https://www.eevblog.com/files/EEVBlogYouTubeCreatorJobDescription2026.pdf

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#ElectronicsCreators
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2026 Electronex Show Walkaround

Forum: https://www.eevblog.com/forum/blog/eevblog-1754-2026-electronex-show-walkaround/

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#ElectronicsCreators #Electronex
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Bart from Cleverscope returns to discuss and show off designing a 2000V isolated oscilloscope, and demonstrates measuring high voltage GaN transistors and Solid State Transformers.
https://cleverscope.com/products/CS548

Forum: https://www.eevblog.com/forum/blog/eevblog-1753-designing-a-2000v-isolated-oscilloscope-(cleverscope)/

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#ElectronicsCreators #Cleverscope
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WTF were Texas Instruments thinking changing the design and major specs of the 45+ year old jellybean NE5532 audio opamp WITHOUT changing the part number?!

New datasheet: https://www.ti.com/lit/ds/symlink/ne5532.pdf
Old datasheet: https://www.mouser.com/datasheet/2/405/ne5532a-556776.pdf
Change Notification: https://mm.digikey.com/Volume0/opasdata/d220001/medias/docus/5726/PCN20231114002.1.pdf
Onsemi datasheet: https://www.onsemi.com/pdf/datasheet/ne5534-d.pdf
Forum thread: https://www.eevblog.com/forum/chat/ti-ne5532-audio-opamp-changes/

General forum related to this video: https://www.eevblog.com/forum/blog/eevblog-1752-wtf-texas-instruments-big-ne5532-changes/

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#ElectronicsCreators #texasinstruments #opamp
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5 different ways to measure phase angle on your oscilloscope.

00:00 - What is phase angle measurement?
01:48 - Automated measurement
06:38 - Cursor Measurement
12:24 - Graticule measurement
13:55 - Positive or Negztive? A trap for young players
14:50 - Another graticule method using horizontal shift
16:00 - How to increase horizontal measurement resolution
17:55 - Lissajous figure (X-Y mode) measurement
22:14 - Measure phase angle using Voltage? Yes, it's possible!

Forum: https://www.eevblog.com/forum/blog/eevblog-1751-oscilloscope-phase-measurement-masterclass/

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#ElectronicsCreators #tutorial #Oscilloscope
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More Mailbag!

00:00 - Linus Tech Tips Screwdrivers!
https://www.lttstore.com/collections/ratcheting-screwdrivers
https://www.lttstore.com/collections/precision-multi-bit-screwdriver
15:30 - Closer look at the screwdrivers
18:52 - Red Light Skin Therapy device
22:31 - Spectrum measurements
27:19 - EZABoard Arduino Learning Kit
https://ezaboard.com/
Videos shot on 16mm film!
https://odysee.com/@MatthewMulder:d
35:40 - Vintage Tek Museum CurveBug Curve Tracer Debugging Tool
https://vintagetek.org/curvebug/

Forum: https://www.eevblog.com/forum/blog/eevblog-1750-mailbag/

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#ElectronicsCreators #Mailbag
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