5 ms·

Chicken Dots

55 points by basicplus2 7y ago

retSava 7y ago
Love this kind of tweaking! Related and in the same manner is to make PCB antennas slightly longer than what you think you need, then tune by shortening (ie cut it with a knife) mm by mm and measure. When you get the desired freq response, this length is what you'd use in the next/final revision of the hw. But that's probably only the most low-cost designs - I think most use a pi matching network: https://coil32.net/online-calculators/pi-matching-network-calculator.html https://coil32.net/online-calculators/pi-matching-network-ca... since it gives more flexibility and can cope with more severe impedance mismatches. (this is on sub-/2.4 GHz, don't know how it works for much lower or higher f)
- willis936 7y ago
  Idk. When I talked to an application engineer that used to manufacture passive CTLEs, they used a microscope, file, and VNA on each one.
Cerium 7y ago
I have wondered what those dots are for, but never asked. Thanks for posting an informative article.
LukaD 7y ago
Interesting, this site doesn't even support TLS 1.1 and Firefox refuses to open it.
- skykooler 7y ago
  Works fine in Firefox 70.0.1.
- floatingatoll 7y ago
  Have you intentionally disabled TLS 1.0?
  - duskwuff 7y ago
    Most major browsers, including Firefox, intend to disable TLS 1.0 and 1.1 early next year. It's possible that LukaD is using a developer release which is previewing this change. https://blog.mozilla.org/security/2018/10/15/removing-old-versions-of-tls/ https://blog.mozilla.org/security/2018/10/15/removing-old-ve... https://security.googleblog.com/2018/10/modernizing-transport-security.html https://security.googleblog.com/2018/10/modernizing-transpor... https://webkit.org/blog/8462/deprecation-of-legacy-tls-1-0-and-1-1-versions/ https://webkit.org/blog/8462/deprecation-of-legacy-tls-1-0-a...
    - floatingatoll 7y ago
      Yes, that was one path on the diagnostic flowchart that the sadly-absent answer would have progressed. The other path is for certain users who have shut off various TLS options after encountering a “security” guide. Those users also often end up with TLS 1.3 disabled, because those security guides are rarely competent.
- HiSch 7y ago
  My firewall/proxy also refuses the connection. This site is a very good example of how not to do it: https://www.ssllabs.com/ssltest/analyze.html?d=www.microwaves101.com https://www.ssllabs.com/ssltest/analyze.html?d=www.microwave... You've got SSLv3, RC4 and even SSLv2.
aszantu 7y ago
there was something special about the dots in the eye of the chickens, something about the distribution of dots in the brown or golden part of the eye, cornea?
ginko 7y ago
I guess those are related to chicken bits, where you have some internal register in an ASIC which allows you to enable/disable a silicon feature in software before shipping. https://en.wiktionary.org/wiki/chicken_bit https://en.wiktionary.org/wiki/chicken_bit

55 points by basicplus2 7y ago

Love this kind of tweaking! Related and in the same manner is to make PCB antennas slightly longer than what you think you need, then tune by shortening (ie cut it with a knife) mm by mm and measure. When you get the desired freq response, this length is what you'd use in the next/final revision of the hw. But that's probably only the most low-cost designs - I think most use a pi matching network: https://coil32.net/online-calculators/pi-matching-network-calculator.html https://coil32.net/online-calculators/pi-matching-network-ca... since it gives more flexibility and can cope with more severe impedance mismatches. (this is on sub-/2.4 GHz, don't know how it works for much lower or higher f)

willis936 7y ago
Idk. When I talked to an application engineer that used to manufacture passive CTLEs, they used a microscope, file, and VNA on each one.

Cerium 7y ago

I have wondered what those dots are for, but never asked. Thanks for posting an informative article.

LukaD 7y ago

Interesting, this site doesn't even support TLS 1.1 and Firefox refuses to open it.

skykooler 7y ago
Works fine in Firefox 70.0.1.
floatingatoll 7y ago
Have you intentionally disabled TLS 1.0?
- duskwuff 7y ago
  Most major browsers, including Firefox, intend to disable TLS 1.0 and 1.1 early next year. It's possible that LukaD is using a developer release which is previewing this change. https://blog.mozilla.org/security/2018/10/15/removing-old-versions-of-tls/ https://blog.mozilla.org/security/2018/10/15/removing-old-ve... https://security.googleblog.com/2018/10/modernizing-transport-security.html https://security.googleblog.com/2018/10/modernizing-transpor... https://webkit.org/blog/8462/deprecation-of-legacy-tls-1-0-and-1-1-versions/ https://webkit.org/blog/8462/deprecation-of-legacy-tls-1-0-a...
  - floatingatoll 7y ago
    Yes, that was one path on the diagnostic flowchart that the sadly-absent answer would have progressed. The other path is for certain users who have shut off various TLS options after encountering a “security” guide. Those users also often end up with TLS 1.3 disabled, because those security guides are rarely competent.
HiSch 7y ago
My firewall/proxy also refuses the connection. This site is a very good example of how not to do it: https://www.ssllabs.com/ssltest/analyze.html?d=www.microwaves101.com https://www.ssllabs.com/ssltest/analyze.html?d=www.microwave... You've got SSLv3, RC4 and even SSLv2.

aszantu 7y ago

there was something special about the dots in the eye of the chickens, something about the distribution of dots in the brown or golden part of the eye, cornea?

ginko 7y ago

I guess those are related to chicken bits, where you have some internal register in an ASIC which allows you to enable/disable a silicon feature in software before shipping. https://en.wiktionary.org/wiki/chicken_bit https://en.wiktionary.org/wiki/chicken_bit