EEVblog

What are all those PCB manufacturing options in the checkout when you order your board? Dave explains each option one by one, from Aluminium to Z-Axis Milling. Including obscure stuff like Organic Solderability Preservative. Gerber generation video: https://www.youtube.com/watch?v=JCXgRyA_-Is PCB Video Playlist: https://www.youtube.com/playlist?list=PL8D3B363139B67FF3 Forum: https://www.eevblog.com/forum/blog/eevblog-1259-pcb-manufacturing-options-explained/ #PCB #Manufacture #Explained EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog

Another dumpster Wandel And Goltermann bit of kit torn down. The PMG-3 Transmission Test Set Previous Wandel & Goltermann Teardown: https://www.youtube.com/watch?v=Yxo_pTfj07U Forum: https://www.eevblog.com/forum/blog/eevblog-1258-more-dumpster-wandel-and-goltermann/ #DumpsterDiving #Teardown EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog

NordVPN got hacked, and it's a tad embarrassing for all the Youtubers who promoted and shilled for them for money, but Dave can't blame them. Let's talk about Youtube video sponsorships, how much money Youtubers make on these deals, advertising integration, and a look at some of the deals Dave gets and what these companies want in return. How much money I make on Youtube: https://www.youtube.com/watch?v=R8qdOAEQnps Forum: https://www.eevblog.com/forum/eevblab/eevblab-67-shilling-nordvpn-youtube-sponsorships/ #NordVPN #Youtube #Sponsorships EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog

The LifeSaber Kickstarter outdoor survival tool is a classic example of a Jack of all trades, master of none product design. A master class in how not to design a practical product. Yet another wind-up/crank USB charger tool with everything but the kitchen sink. It even has ALIENS! Compare Dave's survival kit with the LifeSaber and there is absolutely no contest, this boondoggle of a product has nothing to offer. Dave's Kit: LifeStraw: https://amzn.to/2Iw7d8c Lumintop Tool AA Torch: https://amzn.to/35iajpS Foldable USB Solar Panel: https://amzn.to/2IwrFWt USB Battery Bank: https://amzn.to/2MmeBUz Outdoor matches: https://amzn.to/2VoBRpd Magnesium fire starter: https://amzn.to/2OvbEUq Garmin eTrex 20x: https://amzn.to/31WxWCn About UV ultraviolet disinfectant systems: https://www.watercorporation.com.au/-/media/files/suppliers/resources/design-standards/ds110-ultraviolet-disinfection-systems.pdf Forum: https://www.eevblog.com/forum/blog/eevblog-1251-lifesaber-kickstarter-jack-of-all-trades-master-of-none/ #Kickstarter #FAIL #review Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Dave got one of these newfangled slim wallets, the Stealth Razor from Airo Collective, a Kickstarter project, the world's thinnest wallet. Does it actually replace a full traditional leather wallet? How practical is it? Does the RFID protection work? RFID jammer card tested: https://www.youtube.com/watch?v=rnOuEFR6qoM RFID Protection tested and explained: https://www.youtube.com/watch?v=kp63MZ6RudE Forum: https://www.eevblog.com/forum/blog/eevblog-1250-worlds-thinnest-wallet-review-stealth-razor/ #SlimWallet #Review #Kickstarter Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

A tutorial on how to read timing diagrams. An essential skill for designing and understanding digital logic, FPGA and microcontroller designs and datasheets. Logic Analyser Design: https://www.youtube.com/watch?v=iwRhvhKJlzs Digital logic datasheets explained: https://www.youtube.com/watch?v=sr1DOHnJi8I Forum: https://www.eevblog.com/forum/blog/eevblog-1249-how-to-read-timing-diagrams/ Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Dave found this crazy bargain of the century no-name $9 0.02% class multifuction process calibrator on Aliexpress. Is it any good? Actually, it's an AIMOmeter AMPX1 that sells for over $200 on ebay, so what gives? How can they possibly manufacture and sell a 0.02% class device for under ten bucks? Teardown time. Links to stores with availability, grab two before they are gone: GONE! http://s.click.aliexpress.com/e/2q15Asnm GONE! http://s.click.aliexpress.com/e/KzXfowmG GONE! http://s.click.aliexpress.com/e/pXZzeMQM GONE! http://s.click.aliexpress.com/e/N2SvlX3i GONE! http://s.click.aliexpress.com/e/qREQSsXA GONE! http://s.click.aliexpress.com/e/n9bRRByU GONE! http://s.click.aliexpress.com/e/mgEv3VYU GONE! http://s.click.aliexpress.com/e/B1dhXBHI GONE! http://s.click.aliexpress.com/e/5SZr1USk http://s.click.aliexpress.com/e/KOvQe5u8 http://s.click.aliexpress.com/e/MM6QzxEo http://s.click.aliexpress.com/e/rROyF3hm http://s.click.aliexpress.com/e/Dw6LDRCk Forum: https://www.eevblog.com/forum/blog/eevblog-1248-insane-a-0-02-process-meter-for-$9-wtf/ Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Can you find the fault in the IBM PCjr wireless keyboard before Dave does? A most excellent adventure in troubleshooting. Forum: https://www.eevblog.com/forum/blog/eevblog-1245-most-excellent-ibm-pcjr-keyboard-repair/ #Repair #IBM #Vintage Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

More Mailbag! Ohms Per Square Sheet Resistance video: https://www.youtube.com/watch?v=ME4Xe53TMxI Thermocouple Tutorial Video: https://www.youtube.com/watch?v=AYblSfpKRUk Forum: https://www.eevblog.com/forum/blog/eevblog-1244-mailbag/ SPOILERS: Mailbag SPAM! Arizona If it smells like chicken, you're holding it wrong. 2:57 https://www.tympan.org Open source hardware audio hearing development system. 11:20 Circuit Scribe conductive ink learning kit https://www.circuitscribe.com/ 24:20 Sony RM-440 video editing unit teardown 30:42 Pulse Sensor https://www.pulsesensor.com 31:36 DIY Mouse Kit https://github.com/biomurph/Mouse 32:26 DIY OpenHak open source Fitness tracker https://www.openhak.com 36:34 Faber Castell TR3 scientific calculator and slide rule 42:22 Thermocouple Raspberry Pi Hat http://www.scientificdatasystems.co.uk 46:35 Casio FX-82 Calculator #OpenSource #Hearing #Fitness Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Repair and teardown of a Sony CFD-V10 portable stereo boombox Service manual: https://elektrotanya.com/sony_cfd-v10_sm.pdf/download.html#dl Forum: https://www.eevblog.com/forum/blog/eevblog-1243-sony-boombox-repair-and-teardown/ #Sony #Repair #Stereo Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Part 2 of the power-up counter project, investigating the Sharp Memory LCD & custom LCD's + microcontroller (MSP430 + ST ARM + Microchip) low power design with supercaps, SMD ceramic batteries, and coin cells. Part 1: https://www.youtube.com/watch?v=nTpE1Nw3Yy4 Forum: https://www.eevblog.com/forum/blog/eevblog-1242-memory-lcdsupercapslow-power-design/ #SuperCap #LCD #LowPowerDesign Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Victoria Australia just passed the Professional Engineers Registration Bill 2019, a bill that makes it illegal for unregistered engineers to call themselves a Professional Engineer! How to become a professional engineer: https://www.youtube.com/watch?v=0Tk13MijU4Y http://www.professionalengineers.org.au/registration-where-to-begin/ The Bill: http://www.legislation.vic.gov.au/domino/Web_Notes/LDMS/PubPDocs.nsf/ee665e366dcb6cb0ca256da400837f6b/294b464e14fe6430ca2583b4007b990d/$FILE/591021bi1.pdf Forum: https://www.eevblog.com/forum/chat/professional-engineers-in-victoria-must-now-be-licensed/ #Engineering #Illegal #Victoria Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Looking for a segmented e-ink / e-paper display solution for a power up display counter module project. Forum: https://www.eevblog.com/forum/blog/eevblog-1241-power-up-display-counter-project-part-1/ #Eink #Epaper #Project Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

MORE soldering

Just some soldering

Go back in time to 1980 and a look at what consumer electronics and parts were available from Tandy in the UK. 1980's Tandy Voice Recognition Chip: https://www.youtube.com/watch?v=kFth9K_IvwA Forum: https://www.eevblog.com/forum/jobs/eevblog-1240-tandy-in-the-1980s/ #Tandy #1980s #UK Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

WOW, 3% of Tesla Solar City Panels on Walmart stores are CATCHING ON FIRE! Walmart are suing Tesla! Forum: https://www.eevblog.com/forum/eevblab/eevblab-64-tesla-solar-panels-are-catching-on-fire!/ #Tesla #TeslaSolar #FIRE Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

More Mailbag! Forum: https://www.eevblog.com/forum/blog/eevblog-1239-mailbag/ SPOILERS: Dodgy Plugpack Teardown & Discussion 9:40 eSATA cage thingo teardown 11:47 Ford Car Stereo teardown 18:34 Back To The Future Delorean Time Circuits https://www.marmosetelectronics.com/time-circuits-clock/time-circuits-clock-the-control-board/ 23:39 E-con Systems USB3 Camera Module: https://www.e-consystems.com/usb-cameras/full-hd-low-light-usb-camera-with-stereo-mic.asp Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Is there an issue with Youtube's new video Notifications? Video Self Certification: https://www.youtube.com/watch?v=bHJGUTc43kg #Youtube #Notifications #Problem Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3

Old school, they don't make'em like this any more. Teardown of the HP 3785A Jitter Generator & Receiver with beautiful HP bubble LED displays. Forum: https://www.eevblog.com/forum/blog/eevblog-1237-old-school-teardown-hp3785a-jitter-analyser/ #Teardown #Vintage #HP Bitcoin Donations: 38y7DE8HEHNj8fGDtUr4PkCn9nWxiorvvy Litecoin: ML7oQokTwB38bgzzjLDbRV97HKAHuwRfHA Ethereum: 0x11AceA38DCA9DbFfB4F35f3F746af65F9dED28ce EEVblog Main Web Site: http://www.eevblog.com The 2nd EEVblog Channel: http://www.youtube.com/EEVblog2 Support the EEVblog through Patreon! http://www.patreon.com/eevblog AliExpress Affiliate: http://s.click.aliexpress.com/e/c2LRpe8g Buy anything through that link and Dave gets a commission at no cost to you. Stuff I recommend: https://kit.com/EEVblog/ Donate With Bitcoin & Other Crypto Currencies! https://www.eevblog.com/crypto-currency/ T-Shirts: http://teespring.com/stores/eevblog Likecoin – Coins for Likes: https://likecoin.pro/@eevblog/dil9/hcq3