Supposed to have 10 to 14 km range. But probably at very low data rates.
https://www.facebook.com/reel/936216961243959?mibextid=9drbnH&s=yWDuG2&fs=e
Supposed to have 10 to 14 km range. But probably at very low data rates.
https://www.facebook.com/reel/936216961243959?mibextid=9drbnH&s=yWDuG2&fs=e
A long time ago when we were going to Cat5 UTP, I had a lot of these MX20Ts left over. So I made up a 15 pin plug with the negative 9VDC on pin 6 and positive on pin 13, and soldered the wires to the battery contacts. I taped the battery to the back with some electrical tape. Here, I untaped it because the battery is dead.
I used the plug as the on/off switch and when I plugged in the Cat5 patch cord in the jack, the link LED would light up if the patch cord was connected to the switch.
But the even more useful purpose was to ID the port on the switch. You have someone at the workstation plug in the patch cord, count to ten, unplug the patch cord, count to ten, etc. I’m in the IDF closet watching the switch(es) for the port with the blinking link LED.
So the guy that was helping me at the workstation would say, that’s cool! Would you make me one? So I made several for the guys at the other campuses and departments.
If the odd 15 pin plug wasn’t available, I soldered the wires to the pins and used an on/off switch from Radio Shack – that was good enough for the others. The 9V battery would last a long time with intermittent use. Just remember to repair, recycle and reuse! 👍
This is a long article but a very interesting project. It uses HSMS-2850 Schottky detector diodes in a discriminator. He uses WE 1200 ohm sound powered headphones. He’s Canadian.
https://electronbunker.ca/eb/FMCrystalSet.html
I did this to a chicken and it froze, just like in the video. Tonic immobility is what they call it. It really works.
A 41 min. YouTube video shows operation, tears down, and explains the components. It seems that they are made with cheap chinesium components that are too low voltage ratings so they will fail prematurely if the HVDC is left on a long time or if the spark gap is too wide. Schematic from video is below.
Very short article. Ohio’s largest solar farm will be the largest US agrivoltaics project. The Oak Run Solar Project is 800 MW, with 300 MW battery storage.
Ohio’s largest solar farm will also be the US’s largest agrivoltaics project
A good article about signal distortion in a Butterworth low pass opamp filter using C0G and X7R MLCCs.
https://www.edn.com/signal-distortion-from-high-k-ceramic-capacitors/
Great! One less coal plant. There are more than 100 more coal plants that need to be shut down ASAP.
Pennsylvania’s largest solar farm will replace its largest coal plant
This is a great article by Amory Lovins debunking the myth that the grid requires “base load” – thermal power plants running to back up intermittent renewables.
https://e360.yale.edu/features/three-myths-about-renewable-energy-and-the-grid-debunked