Dave’s Goal Zero Yeti 400 lithium ion battery failed. Repair time. Forum: https://www.eevblog.com/forum/blog/eevblog-1707-repair-goal-zero-yeti-400-lithium-battery/ 00:00 – Goal Zero Yeti 400 Battery failure 01:32 – Hiccuping 03:28 – Teardown 04:47 – Failure hypothesis and potential solution 05:37 – The mains inverter PCB 06:43 – The control PCB 07:36 – Dual battery connectors 08:09 – Measuring the dual …
Is a wrist worn multimeter actually useful? A review of the CZDANG K8 https://s.click.aliexpress.com/e/_opDFvin Use coupon code “doesntsuck” for 10% off the EEVblog 1980s pocket multimeter EEVblog 1980s Pocket Multimeter Forum: https://www.eevblog.com/forum/blog/eevblog-1706-k8-wrist-worn-multimeter-review/
The world’s first desktop personal computer wasn’t the Apple 1 or the Altair 8800. It wasn’t even the HP 9100A, it was the Olivetti Programma 101 from 1965! Computer Teardowns don’t get much more vintage than this. Forum: https://www.eevblog.com/forum/blog/eevblog-1705-the-worlds-first-desktop-computer-teardown/ Links: http://www.oldcomputers.arcula.co.uk/calc3.htm https://bellini.it/portfolio-articoli/mario-bellini-designer/ http://www.curtamania.com/curta/database/brand/olivetti/olivetti%20programma%20101/index.html https://ub.fnwi.uva.nl/computermuseum/delayline.html https://ub.fnwi.uva.nl/computermuseum/p101dl.html https://avvocatostella.com/wp-content/uploads/2015/12/Il-primo-personalcomputer-lOlivetti-La-Programma-101.pdf https://www.oldcalculatormuseum.com/c-programma101.html https://www.fondazioneadrianolivetti.it/en/p101-cecam/ https://www.inexhibit.com/case-studies/olivetti-programma-101-at-the-origins-of-the-personal-computer/ https://forum.vcfed.org/index.php?threads/olivetti-programma-101-documentations-and-experiences.1239428/ https://handwiki.org/wiki/Engineering:Programma_101 Service manual: https://vintagecomputer.ca/files/Olivetti/Programma%20101/repair/RepairManualP101.pdf Reference …
WTF is this design? The ANENG 626 Smart Multimeter Forum: https://www.eevblog.com/forum/testgear/aneng-626-multimeter-hell/ 00:00 – ANENG 626 Unboxing 02:14 – Charging + USB isolation test. CAT III 600V LOL 03:32 – Power on and UI 05:20 – UI Design Hell + Chocolate Wheel mode. Every child wins a prize! 06:26 – Continuity mode 07:13 – Screen angle …
A repair of this Tennismatic T1000 remote control was way more interesting than I expected. https://tennismatic.com/main/page_products_ball_machines_t100_series.html Forum: https://www.eevblog.com/forum/blog/eevblog-1702-a-most-interesting-repair/ 00:00 – Tennismatic 1000 Tennis ball machine remote control 00:53 – Battery snap ohms measurement 01:17 – Battery current measurement 02:29 – It’s a row/column thing 02:57 – Teardown 05:20 – Membrane inspection 06:44 – Membrane keypad …
The $599 Moku:Go from Liquid Instruments is an Australian designed and manufactured USB/Ethernet/WiFi instrument, with 14 instruments in 1, and a 4 channel power supply. Oscilloscope, Voltmeter, Logic Analyser, Waveform generator, Frequency Response Analyser, Lock in Amplifier, Laser Lock Box, Spectrum Analyser, PID Controller, Digital Filter, FIR Filter Builder, Data Logger, Pattern Generator. https://liquidinstruments.com/products/hardware-platforms/mokugo/ 00:00 …
Part 1 of the µTimer project, a versatile benchtop lab timer. Choosing the LCD, and getting two sample LCD’s running. One using a demo board, and one that needed to be hacked onto a Raspberry Pi. 00:00 – Benchtop Lab Timer Project 01:19 – It’s all about the choice of LCD 03:14 – ERC19624-1 192×64 …
I scored this GW Instek APS-7050 Precision AC Power Source on Ebay, let’s check it out. Forum: https://www.eevblog.com/forum/blog/eevblog-1698-awesome-ebay-ac-power-source-gw-instek-aps-7050/
Why does this Uni-T UDP6731 PSU use different brand LM358 opamps on the same PCB? All about Bill Of Materials, SMD pick and place machines, suppliers and specifications. Links: Jellybean Opamps: https://www.youtube.com/watch?v=uq1DMWtjL2U NESS Factory tour: https://www.youtube.com/watch?v=bTij7Juj5qE http://www.artschip.com/pdf/LM358.pdf https://www.st.com/content/ccc/resource/technical/document/datasheet/61/46/87/01/98/ed/44/c5/CD00000464.pdf/files/CD00000464.pdf/jcr:content/translations/en.CD00000464.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1697-whats-up-with-different-brand-op-amps/
A short tutorial on the maximum efficiency and power you can get from a wind generator. Also applies to water turbine generators. Also deriving the industry standard wind power formula from first principles: Power (W) = 1/2 x ρ x A x v^3 Don’t let any wind power marketing scams fool you, you canna’ beat …
More mailbag! 00:00 – Nifty USB Knob from Tiny Little Gadgets https://www.etsy.com/uk/shop/TinyLittleGadgets 03:38 – Reference Circuit PCB books https://www.boltind.com/product-category/reference-circuits-books/ 09:57 – Robin RCD/ELCB Tester 20:57 – Geekom IT12 i7 Mini PC Forum: https://www.eevblog.com/forum/blog/eevblog-1695-mailbag-robin-rcd-tester-pcb-book-usb-knob-geekom-it12-mini-p/
A teardown and design discussion of the Scarlett Rae heater for females, with the designer Scott Williams from Xentronics. Recorded at the Electronex exhibition in Melbourne https://scarletperiod.com/products/rae https://xentronics.com.au/ The Amp Hour discussion on design consulting: https://theamphour.com/624-design-manufacturing-consulting-with-scott-williams-from-xentronics/ Forum: https://www.eevblog.com/forum/blog/eevblog-1694-scarlet-rae-teardown-and-design-discussion-with-xentronics/
It looks like Youtube are finally going to do something about the AI slop channels that are plaguing Youtube? It’s called YOUtube for a reason. If you want AI info slop, go to INFOtube. Forum: https://www.eevblog.com/forum/blog/eevblab-130-youtube-are-finally-demonetising-ai-channels/
A teardown of the Uni-T UTE 310 Digital Power Meter, and an example meausing the power consumption of the new Brymen BM786BT multimeter in bluetooth data transmission mode. https://uni-trendus.com/products/ute310-digital-power-meter Forum: https://www.eevblog.com/forum/blog/eevblog-1693-uni-t-ute310-power-meter-teardown-practical-demo/ 00:00 – Uni-T UTE310 Power Meter 02:44 – Teardown 06:54 – Power supply 07:47 – FPGA and ARM processors (plural) 09:23- Seperate isolated volatge …
Is a US$130 Fluke multimeter any good? A review of the Fluke 17B MAX Multimeter Forum: https://www.eevblog.com/forum/blog/eevblog-1692-$130-fluke-17b-max-multimeter-review/ Why are Fluke meters so expensive: https://www.youtube.com/watch?v=ay9wFQAW19Y Fluke 17B multimeter teardown: https://www.youtube.com/watch?v=TbEtcpM0RGc Fluke vs Brymen Teardown: https://www.youtube.com/watch?v=3Hlmq57FQQk 00:00 – US$130 Fluke 17B MAX Multimeter 02:32 – Construction 04:52 – What’s in the (China Only) box? 06:14 – New …
The Uni-T UDP6700 series UDP6731 360W slimline Bench Lab Power Supply REVIEWED https://instruments.uni-trend.com/products/dc-power-supplies/UDP6700 https://uni-trendus.com/products/udp6731-360w-basic-dc-switching-power-supply-80v-15a 00:00 – Uni-T UDP6731 PSU 01:30 – Beware of thermal stacking 02:55 – Teardown 07:35 – Sneaky fan 11:24 – Remember the Riden RD6006, also 350W 13:10 – Power up 16:04 – The display and UI 18:14 – Instantaneous knob 19:16 …
More Mailbag! 00:00 – Zifnu K-16 Kickstarter LED light https://www.zifnu.com/ 11:02 – Qoool Sensing: Diamond Quantum Fluorescence Demo https://qoool-sensing.org 16:41 – Logic Gate Educational Demo Board https://logicgat.es/ 20:15 – Beelink ME Mini 6 x M.2 Slot Home Storage NAS https://www.bee-link.com/products/beelink-me-mini-n150?ref=OKJKQ Forum: https://www.eevblog.com/forum/blog/eevblog-1690-mailbag-zifnu-led-quantum-diamonds-logic-gates-m-2-nas/
Another Colour A3 photocopier in the dumpster! Is this an upgrade? Fuji-Xerox Docucentre V C4476 Forum: https://www.eevblog.com/forum/blog/eevblog-1689-another-dumpster-diving-a3-colour-photocopier/
DC Constant Current sources explained and demonstrated. Forum: https://www.eevblog.com/forum/blog/eevblog-1688-constant-current-sources-explained-demo/ Voltage and Current Source Theory: https://www.youtube.com/watch?v=AQK7RyecVW0 DC Circuit Fundamentals Playist: https://www.youtube.com/playlist?list=PLvOlSehNtuHtVLq2MDPIz82BWMIZcuwhK 00:00 – Constant Current Sources 11:08 – Practical uses of constant current sources 14:00 – Circuit examples 19:13 – TL431 Example 20:25 – LM317 CC circuit 21:42 – Low Side Source vs High Side Current …
The repair of alkaline battery leakage in this Keysight U1177A Bluetooth mulitmeter adapter was, well, pointless…. Forum: https://www.eevblog.com/forum/blog/eevblog-1687-a-pointless-alkaline-battery-leakage-repair-462018/