2023 brings us Solar Freakin’ RAILways! from Swiss start-up Sun-Ways A dumber idea than Solar Roadways?

Forum: https://www.eevblog.com/forum/blog/eevblog-1534-solar-freakin-railways!/

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00:00 – Solar Freakin’ RAILways!
00:56 – Yes, Solar Freakin’ Roadways are STILL going!
02:53 – EVERY solar roadways startup has failed, epicly.
05:12 – Let’s watch the promo video!
09:05 – Showstoppers as far as the eye can see
10:14 – You NEVER go full Brusaw! (Melting snow!)
11:16 – Err, dust anyone?
14:23 – Let’s look at the location. Is there are a better place to put solar panels?
16:49 – The South Korean’s have a solution
17:32 – Stop it. Just stop it. But the grift is real.

How to estimate the battery life of a product. In this example, the BM786 multimeter. How to measure battery current accurately, avoiding Burden voltage, and looking at battery datasheets characteristic curves. The difference between alkaline and lithium primary batteries. If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog

Forum: https://www.eevblog.com/forum/blog/eevblog-1533-how-to-estimate-product-battery-life/

00:00 – What is the battery life of the BM786 multimeter?
01:55 – DaveCAD – Linear Regulators are Constant Current loads.
03:49 – The Rohde & Schwarz NGA100 PSU is pretty schmick
05:00 – The Burden Voltage problem
06:34 – Current consumption in AC mode and backlight
07:58 – The battery cutout voltage and hysteresis
08:48 – Why do multimeters waste battery capacity?
09:21 – Alkaline Battery Datasheet time
10:06 – DC-DC Converters are Constant Power loads
12:00 – How good are Energizer Lithium batteries?
14:26 – Temperate effect on lithium batteries
15:30 – Different types of characteristic curves
16:36 – Extraporlating the curve
18:46 – Conclusion

Will the human perceived quality of the AI ChapGPT output eventually reach an inflection point where the quality decreases because there is now too much AI produced content to learn from?

WiGL have raised another $2.8M on StartEngine for their mobile phone charging wireless power grift, in addition to the $5M they raised a year ago. And yep, it’s STILL using off the shelf technology, but this time with a new partner PowerCast!
https://www.startengine.com/offering/wigl

Forum: https://www.eevblog.com/forum/blog/eevblog-1532-another-$2-8m-wigl-wireless-power-grift/ Busted article by Caleb Naysmith
The 5 biggest StartEngine successes by Caleb Naysmith

Powercast confirm the energy receive levels for the 3W EIRP transmitter used: https://www.powercastco.com/frequently-asked-questions/

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Can ChatGPT generate all the code for my Macgyver Project? Does ChatGPT understand what 7 segment displays and shift registers are, and can it integrate that knowledge with Arduino programming? Let’s find out! This is Part 3 of the Magyver project.

If you find my videos useful you may consider supporting the EEVblog on Patreon

Forum: https://www.eevblog.com/forum/blog/eevblog-1531-can-chatgpt-generate-all-the-code-for-my-macgyver-project/

The most amazing feature of the new Siglent SDS2000X HD 12 Bit Oscilloscope was surprising! Teardown time.

If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog

Forum: https://www.eevblog.com/forum/blog/eevblog-1530-siglent-sds2000x-hd-12-bit-oscilloscope-teardown/

Unboxing, first impression, and some experiments with the new Rohde & Schwarz MXO4 12bit oscilloscope. Is the new MXO-EP ASIC faster than the Keysight Megazoom IV ASIC?

If you find my videos useful you may consider supporting the EEVblog on Patreon

https://www.rohde-schwarz.com/us/products/test-and-measurement/oscilloscopes/rs-mxo-4-oscilloscope_63493-1164992.html

Brochure: https://scdn.rohde-schwarz.com/ur/pws/dl_downloads/dl_common_library/dl_brochures_and_datasheets/pdf_1/MXO_4_bro_en_3609-8473-12_v0402.pdf

A wheelie bin full of medical devices found in the dumpster! If you find my videos useful you may consider supporting the EEVblog on Patreon

Forum: https://www.eevblog.com/forum/blog/eevblog-1528-i-found-a-bin-full-of-dumpster-medical-devices!/

This Ebay Toshiba T1000LE vintage DOS In ROM laptop repair turned out looking promising until, well, it didn’t…

Forum: https://www.eevblog.com/forum/blog/eevblog-1527-toshiba-t1000le-dos-vintage-laptop-repair-hell/

00:00 – THE laptop that cointed the term Notebook, the Toshiba T1000 series
05:46 – It obsoleted the Tandy 100 and Tandy 200
07:00 – Powering up
10:16 – Opening up had a few issues – OOPS
12:12 – The first suspect
17:55 – Bad caps?
20:50 – Suspect process
23:18 – Backup battery SRAM problem
24:12 – Thermal camera
26:32 – Extra sneaky PSU
33:27 – Under the microscope, this looks BAD!
37:00 – Yuck!
44:28 – BUSTED

I found 283 mains double adpters in the dumpster. What happens if you put them all in series with a 2kW load? I’m glad you asked!

If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog

00:00 – I found 283 double adapters in the dumpster!
00:58 – We goofed it already
02:06 – Cable capaciitance
03:14 – Testing a 2kW load!
05:50 – DaveCalc, power loss per adapter
07:37 – Internal wiring and Teardown
09:56 – What is the resistance?
11:23 – Thermal camera test
14:06 – Ohmic Meditation Dumpster

Forum: https://www.eevblog.com/forum/blog/eevblog-1526-i-put-283-double-adapters-in-series-with-a-2kw-load/

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00:00 – Comissioned component artwork
https://www.bad-dog-designs.co.uk/
01:48 – 1.3GHz DIY FET probe
https://hackaday.io/project/184924-diy-13-ghz-fet-probe https://github.com/makerprobe/FETProbe_tiny
07:53 – The uSupply makes an apperance!
09:14 – Ron Demcko sends in some goodies
14:23 – Mysterious Patent
19:10 – USB Power Injector Crowd Supply kit https://www.crowdsupply.com/board-outline
21:25 – Elimo Engineering electronic business card
https://elimo.io/
23:29 – Ambit Infusion Pump Teardown
30:20 – Metrawatt M2037 Multimeter Teardown

Forum: https://www.eevblog.com/forum/blog/eevblog-1525-commisioned-mailbag/

Checking out the new 10 cent WCH CH32V003 48MHz RISC V processor demo board and the MounRiver Eclipse IDE. Getting to blinky. The CH32V003 is a pin-for-pin alternative to the STM8S003 at 1/3rd the price, with more features.

If you find my videos useful you may consider supporting the EEVblog on Patreon: http://www.patreon.com/eevblog

http://www.wch-ic.com/products/CH32V003.html http://www.wch-ic.com/products/categories/47.html?pid=5 https://www.tindie.com/products/adz1122/ch32v003-risc-v-mcu-development-board/
http://www.mounriver.com/download

00:00 – WCH CH32V003 RISC V Processor
02:01 – CH32V003F4P6 Eval board
03:00 – Pin-for-pin replacement for the ST STM8S003
04:30 – Datasheet and reference manual
05:24 – MounRiver Eclipse IDE
07:13 – It just worked
10:58 – Open Source GNU RISC V Cross Compiler
11:38 – Download and flash a LED, maybe…
13:51 – Save the file first, dummy.
15:26 – All the includes and headers
17:37 – But can you buy them?
18:11 – How fast can the pin toggle?

Forum: https://www.eevblog.com/forum/blog/eevblog-1524-the-10-cent-risc-v-processor-ch32v003/

Stopping the robot uprising by tearing down a Samsung SR8980 robotic cleaning robot found in the dumpster.

Forum: https://www.eevblog.com/forum/blog/eevblog-1523-dumpster-samsung-cleaning-robot-teardown/

Part 2 of the BM786 troubleshooting repair, proving it’s the processor at fault.

Forum: https://www.eevblog.com/forum/blog/eevblog-1520-troubleshooting-a-faulty-bm786-multimeter/

ChatGPT has changed everything in the space of a month.
2023 will be the year of Conversational Search and computer code generation.
And how MidJourney and DALL-E have rendered artists obsolete, or at least turned ANYONE into a great and capable artist.
This video thumbnail was generated in seconds by Dave who has ZERO artistic skills.
Why The Chaser is setting up a futile paywall to stop the AI invastion.

What is Common Mode Rejection Ratio (CMRR) and how to measure it on a high voltage differential probe or differential amplifier.

Extended 30min version: https://www.youtube.com/watch?v=4gi2B3LrCww
Differential Probe How It Works: https://www.youtube.com/watch?v=GOlgaEK2Hsk
High Voltage Probe reverse engineering: https://www.youtube.com/watch?v=GOk1BYKSsOI&t=2s

Forum: https://www.eevblog.com/forum/blog/eevblog-1521-how-to-measure-differential-probe-cmrr/

Looking at a faulty returned BM786 multimeter. Warning: Some components were harmed in the making of this video.

Forum: https://www.eevblog.com/forum/blog/eevblog-1520-troubleshooting-a-faulty-bm786-multimeter/

Hacking a dumpster Sonos Play 5 Gen 1 speaker to remove all the evil software locking and turn it into a dumb speaker with just line-in and basic wireless Bluetooth. Integrating a new Fosi Audio ZX-TB21 2+1 amplifier. https://amzn.to/3USD7xQ

Sonos, the Juicero of wireless speakers: https://www.youtube.com/watch?v=lLyjvXAJcLM

Forum: https://www.eevblog.com/forum/blog/eevblog-1519-free-your-sonos-speaker!-(hack)/

Depotting, teardown, and some reverse engineering analysis of the 400W Hoymiles solar microinverter. https://www.hoymiles.com/products/microinverter/
Hoymiles vs Enphase microinverter review: https://www.mcelectrical.com.au/hoymiles-microinverter-review/

Forum: https://www.eevblog.com/forum/blog/eevblog-1518-hoymiles-solar-microinverter-teardown/

Installation of a Reclaim Heat Pump hot water system replacing a high efficiency gas tank hot water system. And anlysis of the results. Is a heat pump hot water system more efficient than a gas hot water system?
Forum: https://www.eevblog.com/forum/blog/eevblog-1517-heat-pump-hot-water-install-analysis/

00:00 – The existing gas tank hot water system
03:11 – Thermal IR camera measurements
05:16 – Installation of the new Reclaim heat pump hot water tank
08:20 – The pipework and tempering valve explained
11:55 – Water temperature measurements
12:32 – Standby power consumption
13:11 – Analysis of results after 9 days
18:58 – What is the efficiency of a gas tank hot water system?
20:35 – Gas vs heat pump energy usage
21:17 – 9 days data
25:03 – Estimating the Coefficient of Performance (COP)
29:44 – Tank thermal statification