Viewing profile — jonathonlui

There's some testing to see how covering open irrigation canals with solar panels which would reduce evaporation and generate power > Their analysis found that putting solar panels…

Some mobile phone providers check the packet TTL to limit tethering. Network packets commonly have start with default TTL values of 64, 128, or 255. Each hop in the network subtrac…

At the bottom of page: > Copyright © 2014 - 2025 Mark Litwintschik. This site's template is based off a template by Giulio Fidente [1] The theme is for the Pelican [2] static site …

Not a pro, but the handful of times a month I solder, the Pinecil has been great. It can use TS100 tips so easy to get different tips. It packs easily away in a plastic shoebox wit…

As you noted, in the US, 3G and older cellular modems aren't usable. For current cellular technology, the keywords to look for are LTE-M [0] and NB-IoT [1]. Most of these types of …

There's a ~$90 million wildlife crossing that started construction earlier this year in Agoura Hills, CA [1] where apparently many mountain lions try to cross. It wouldn't have hel…

After issues using various (cheap) USB 1Gbps ethernet adapters and an Intel MBP, I ended up getting one that uses a RTL8156B and seems ok. These are 2.5Gb adapters that use NCM dri…

This makes me think of of the Amazon Dash button which had a microphone [0] that would listen for ultrasound emitted from your phone to configure wifi credentials. [0] http://www.b…

In the USA, some states (including California) and private health care providers are using something called Smart Health Card [0] which is a signed JWT using public/private keys. I…

Waveshare sells 1 to 13-inch panels for 7 to 540 USD: https://www.waveshare.com/product/displays/e-paper.htm Pixel density isn't as good as say a nice Kindle, but they are usable. …

If you can wire the 2 AP via a LAN, then this is how I've used cheap consumer wifi APs which are usually combo AP+router devices: The first AP is connecting to internet gateway thr…

I use the Feitian Multipass that I bought from Amazon before Titan Keys were available. I had connected to my Google account using my iphone. This morning I received the "Update on…

If you're self-employed (e.g. contractor) can set up a SEP-IRA and do "employer" contributions in addition to the regular "employee" IRA contribution. Another option is a "solo" 40…