EEVblog
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The EEV blog is hosted by David L. Jones, an electronics design engineer based in Sydney Australia. In each episode he shares some of his 25 years experience in the electronics design industry in his unique non-scripted naturally enthusiastic and passionate style.
EEVblog
1w ago
A lot of texbooks don’t teach Composite Amplifiers, but they are one of the most used circuit configurations to solve real world design poblems where you have multiple conflicting specifications.
Opamp Tutorial Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHu2FviAaZaiyXwN41G4b1Lf
Cascaded Compound Amplifiers: https://www.youtube.com/watch?v=ZvT9hHG17tQ
Forum: https://www.eevblog.com/forum/blog/eevblog-1609-composite-amplifier-tutorial-practical-demo/
00:00 – Composite vs Compound Amplifiers
02:53 – How a Composite Amplifier works
05:09 – Why not just cascade them?
07:23 – This do ..read more
EEVblog
1w ago
More mailbag!
00:00 – Jumperless Breadboard from Architeuthis Flux & WokWi
https://www.tindie.com/products/architeuthisflux/jumperless/
https://hackaday.io/project/191238-jumperless/log/222858-getting-started-using-your-jumperless
https://wokwi.com/
https://www.digikey.com/en/maker/projects/jumperless/2e62cc88ee6145bc924041dd486de76f
https://theamphour.com/599-an-interview-with-uri-shaked-wokwi-com/
08:42 – Trying the software, it didn’t go so well…
21:20 – Automated probe connection function
22:35 – My old IC Tester project
23:32 – 16TB Hard Drive
25:26 – Modius Headband: Induce sickness ..read more
EEVblog
2w ago
Physically vibrating your power supply at a sub harmonic of your PSU switching frequency can potentially lower your system noise. A practical demonstration.
AlienTek DP100: https://s.click.aliexpress.com/e/_DeWCLIN
Forum: https://www.eevblog.com/forum/blog/eevblog-1607-psu-switching-noise-reduction-via-vibration/
Linked videos:
Tesla AI PSU problem: https://www.youtube.com/watch?v=YIbQ3nudCA0
Vibration coherence: https://www.youtube.com/watch?v=uus_cpZiqsU
Vibration testing: https://www.youtube.com/watch?v=1Y2L6QLOi-c
AlienTek DP100 PSU: https://www.youtube.com/watch?v=Pd6LG7iP2GQ
Ceramic Cap ..read more
EEVblog
2w ago
AlienTek DP100 100W USB-C PSU REVIEW
https://s.click.aliexpress.com/e/_DeWCLIN
PSU Noise measurement: https://www.youtube.com/watch?v=G8Qoj3TpO9A
Forum: https://www.eevblog.com/forum/blog/eevblog-1606-$45-alientek-dp100-100w-usb-c-psu-review/
00:00 – AlienTek DP100 100W USB-C PSU Unboxing
02:43 – Power on and operation
08:57 – User Manual
10:01 – Trying USB-C source
10:44 – Setting Menu
12:00 – uSupply Inception
12:55 – Physical size comparison
13:16 – Teardown
14:44 – PCB Inspection and design analysis
18:14 – BOM Consolidation & MOSFET’s
19:15 – USB Power Delivery Chip
20:46 – MP9928 Bu ..read more
EEVblog
1M ago
Dave is chasing fart noises in this JBL Charge 3 waterproof speaker.
A teardown, and powerup on the bench to find the mysterious fart noises.
Will it get repaired, or will the fault do a Harold Holt?
Part 2: https://www.youtube.com/watch?v=u7sVGnrf0P0
Forum: https://www.eevblog.com/forum/blog/eevblog-1605-chasing-fart-noises-jbl-charge-3-repair/
00:00 – JBL Charge 3 Waterproof Speaker Fault
02:17 – Teardown
07:13 – Drivers
08:16 – Passive Radiators
09:58 – The Case Moulding
10:46 – Main PCB
11:36 – Under the microscope
15:30 – What’s this Power Rail doing?
18:07 – Power Rail Capture
20:16 – A ..read more
EEVblog
1M ago
Burden Voltage is a BIG trap with Multimeters, don’t get caught out!
A short video demonstrating the impact of Burden Voltage / Shunt Resistance on current measurement.
Mutlimeter Shunt Tutorial Part1: https://www.youtube.com/watch?v=jx0dryLmUEQ
Part 2: https://www.youtube.com/watch?v=xSEYPP5Xsi0
Forum: https://www.eevblog.com/forum/blog/eevblog-1604-beware-multimeter-burden-voltage ..read more
EEVblog
1M ago
Repair of a Sony HCD-SBT20B Bluetooth Stereo. What it’s like to nail the repair and then, well come-a-gutsa and have to go down the rabbit hole to fix the fix all whilst battling bad design info.
How VFD displays work: https://www.youtube.com/watch?v=gZIRPJt69sM
Mud run video: https://www.youtube.com/watch?v=yAahT8_P-_E
Tektronix autopsy: https://www.youtube.com/watch?v=VZCokbsTwmQ
Forum: https://www.eevblog.com/forum/blog/eevblog-1603-sony-amplifier-repair/
00:00 – Sony HCD-SBT20B Bluetooth Stereo with a water ingress problem
01:17 – Water isn’t that bad actually, even mud.
02:49 – Comically ..read more
EEVblog
1M ago
How VFD (Vacuum Fluorescent) Displays Work.
Extracted from a hacking video #717: https://www.youtube.com/watch?v=clUVEyi_YNM
Forum: https://www.eevblog.com/forum/blog/eevblog-1601-how-vfd-(vacuum-fluorescent)-displays-work ..read more
EEVblog
1M ago
ouute: Road Based Energy! Harvest kinestic energy from cars using speed bumps. Will this decarbonise and save the planet? Do the numbers add up?
https://www.rouute.com/road-based-energy
Discount Morgan Freeman promo video: https://www.youtube.com/watch?v=uGw2lcTS1gs
Introducing Rouute test video: https://www.youtube.com/watch?v=BxnksdL5nx8
https://www.electricaltimes.co.uk/worlds-first-road-based-energy-recovery-system-set-to-launch-to-market-to-help-drive-net-zero-agenda/
https://www.business-live.co.uk/manufacturing/grimsby-start-up-could-generate-26824298
https://www.facebook.com/rouutetec ..read more
EEVblog
1M ago
The TOP 5 Jellybean Bipolar Junction Transistors (BJT)
00:00 – What is a Jellybean Component?
01:30 – Low Power BJT: 2N3904 / 3906, SMD Marking 1A
06:49 – 2N2222
08:52 – BC547 fanboys
09:28 – Medium Power BJT: FMMT617-619 / 717-719
12:27 – SS8050 / 8550
15:08 – High Power BJT: 2N3055 / 2955
17:09 – Sneaky MOSFET, and the differences from BJT’s
19:30 – High Voltage BJT: FZT458 / 558, FMMT458/558
Jellybean Series Playlist: https://www.youtube.com/playlist?list=PLvOlSehNtuHv268f0mW5m1t_hq_RVGRSA
Forum: https://www.eevblog.com/forum/blog/eevblog-1599-top-5-jellybean-bipolar-transistors ..read more