A few weeks ago I started a summer project together with my viewers. I proposed to build a Robo Tank. Many people commented, and more than 200 joined the project when the infrastructure was ready. Are you interested in what happened afterward? You will also learn about using Discord for project management. Links: Discord: https://discord.gg/wpN6Uss Github: https://github.com/SensorsIot/RoboTank Google Docs: https://drive.google.com/drive/u/1/folders/1kyE0lTHJltUxwlJrEisewf1MkYsreueS Tank: http://bit.ly/2pkRKAt or http://s.click.aliexpress.com/e/3l2lPDO ESP32 board. used: http://bit.ly/2sOMR3E and http://s.click.aliexpress.com/e/ca3MR3Xw Monster Motor Driver Board: http://s.click.aliexpress.com/e/bPGlc8vi Joysticks: http://s.click.aliexpress.com/e/5LJh0Lm ... https://www.youtube.com/watch?v=dxRlihA1Yas

I am often asked: Where do I get a good antenna? Or: Is this a good antenna? Unfortunately, you do not see if an antenna is good or bad before you do some measurements. Or you build one yourself. That is what we will do today. Be it for satellite reception, for LoRa, weather balloons, or even for Wi-Fi. Like that, we know what we have. And even can save some money. I am a proud Patreon of @GreatScott! , @ElectroBOOM , @Electronoobs , @EEVblog , and others No Docker, No Microsoft Teams, Zoom Links: 2.8" NanoVNA: https://www.tindie.com/products/hcxqsgroup/nanovna-v2-plus/ 2.8" SMA NanoVNA V2: https://s.click.aliexpress.com/e/_A6Pm3F or https://s.click.aliexpress.com/e/_9zdUZ9 4" Type N NanoVNA V2: https://s.click.aliexpress.com/e/_AaJcaR SMA connectors male: https://s.click.aliexpress.com/e/_A6CM7R SMA connector female: https://s.click.aliexpress.com/e/_9xPlRx Semi-rigid cable: https://s.click.aliexpress.com/e/_AOzVM9 Simulation Software: https://hamsoft.ca/pages/mmana-gal.php Ground-Plane Calculator: https://m0ukd.com/calculators/quarter-wave-ground-plane-antenna-calculator/ J-Pole Calculator: https://m0ukd.com/calculators/slim-jim-and-j-pole-calculator/ Chapters: 00:00 Intro 00:41 Parts of an antenna 01:02 The Ground plane antenna 01:28 Impedance 01:45 Connectors 03:40 Building the ground plane antenna 04:48 Which wires and how long? 05:48 The build 07:04 What is a good antenna (including measurements)? 10:07 The antenna is finished 11:20 Far-field pattern and gain (incl. Simulation Software) 12:48 Other applications (Wi-Fi, satellites) 13:22 Conclusions 14:03 One last thing 14:30 Outro The links above usually are affiliate links that support the channel (no additional cost for you). Supporting Material and Blog Page: http://www.sensorsiot.org Github: https://www.github.com/sensorsiot My Patreon Page: https://www.patreon.com/AndreasSpiess Discord: https://discord.gg/JfgDSa8 If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel My Amazon.com shop: https://www.amazon.com/shop/andreasspiess For Banggood https://bit.ly/2jAQEf4 For AliExpress: http://bit.ly/2B0yTLL For Amazon.de: http://amzn.to/2r0ZCYI For Amazon UK: http://amzn.to/2mxBaJf For ebay.com: http://ebay.to/2DuYXBp https://www.facebook.com/profile.php?id=100013947273409 https://twitter.com/spiessa https://www.instructables.com/member/Andreas%20Spiess/ Please do not try to email me. This communication channel is reserved for my primary job As an Amazon Associate, I earn from qualifying purchases #no#midroll#ads ... https://www.youtube.com/watch?v=6cVYsHCLKq8

In this mailbag I unpack some new stuff. But I will not only unpack it, I will also test some of the items, just as I normally do to make sure, the goods are ok before I confirm delivery or start a dispute. Content: Lead: http://www.ebay.de/itm/361311988840?_trksid=p2057872.m2749.l2648&ssPageName=STRK%3AMEBIDX%3AIT Capacitor Assortment: http://www.aliexpress.com/item/500pcs-10Valuesx50-0-1uF-10uF-104-106-Multilayer-Monolithic-Ceramic-Capacitor-Assorted-kit-with-storage-box/32375787768.html NRF905 433 MHz: http://www.aliexpress.com/item/5pcs-433-MHZ-band-NRF905-wireless-data-transmission-module-supporting-spring-antenna/32430929889.html Binocular lens adaptor: http://www.aliexpress.com/item/Free-shipping-C-MOUNT-LENS-ADAPTER-FOR-VIDEO-CAMERA-MICROSCOPES/565596888.html Adaptor Sony NEX to C-Mount : http://www.aliexpress.com/item/FOTGA-Adapter-Ring-For-C-Mount-Lens-to-Sony-NEX3-NEX5-NEX7-NEX-5C-5N-5R/1939096414.html Different RF cables and adaptors: http://www.aliexpress.com/store/1769087 NRF905 433MHz (not 868MHz) modules: http://www.aliexpress.com/item/10pcs-lot-NRF905-wireless-module-PTR8000-wireless-transmission-module-NF905SE/32586897146.html 74HCxx Assortment: http://www.aliexpress.com/item/30-Types-74HCxx-Series-Logic-IC-Assortment-Kit-High-Speed-Si-Gate-CMOS-IC/32393758820.html Loudspeaker: http://www.aliexpress.com/item/Midas-Free-Shipping-10-PCS-LOT-42R-42-Ohm-General-3V-5V-Passive-Buzzer-Magnetic/32486998116.html 74HCxx Assortment: http://www.aliexpress.com/item/30-Types-74HCxx-Series-Logic-IC-Assortment-Kit-High-Speed-Si-Gate-CMOS-IC/32393758820.html ES9023 board: http://www.aliexpress.com/item/ES9023-decoder-board-I2S-input-192KHZ-synchronous-asynchronous-Raspberry-PI-Free-shipping-tracking-number/32370632889.html ... https://www.youtube.com/watch?v=houV6xFxdK8

Green politics and how we deal with energy sparked a lot of discussions lately. For some people, energy harvesting sounds very promising to contribute to that topic. But is this true? How does it work, and where does it fit? Let’s have a closer look. Links: AEM10941: https://www.tindie.com/stores/jaspersikken/ BQ25504: http://s.click.aliexpress.com/e/HXEnqyC BQ25570: http://s.click.aliexpress.com/e/b4zGfKso LTC3108: http://s.click.aliexpress.com/e/ccBqQX8M LTC3588: http://s.click.aliexpress.com/e/LC6NX0M e-peas: https://e-peas.com/ Indoors tests: https://www.limpkin.fr/index.php?post/2012/03/20/Indoor-solar-energy-harvesting%3A-3-months-data Moovement video: https://www.youtube.com/watch?v=8tsjqF-N-6Y&feature=youtu.be Supporting Material and Blog Page: http://www.sensorsiot.org Github: https://www.github.com/sensorsiot My Patreon Page: https://www.patreon.com/AndreasSpiess My Bitcoin address: 19FSmqbBzb5zsYB1d8Bq4KbxVmezToDNTV If you want to support the channel, please use the links below to start your shopping. No additional charges for you, but I get a commission (of your purchases the next 24 hours) to buy new stuff for the channel For Banggood https://bit.ly/2jAQEf4 For AliExpress: http://bit.ly/2B0yTLL For ebay.com: http://ebay.to/2DuYXBp https://www.facebook.com/profile.php?id=100013947273409 https://twitter.com/spiessa https://www.instructables.com/member/Andreas%20Spiess/ Please do not try to Email me or invite me on LinkedIn. These communication channels are reserved for my primary job ... https://www.youtube.com/watch?v=KaiQDS9jObY