lordofflies

joined 9 months ago
[–] lordofflies@lemmy.ml 1 points 1 week ago* (last edited 1 week ago)

I've always had extremely slow message deliveries when using delta chat , with me being on one chatmail server and the other party being on another one.

Am I doing something wrong? In the setup anywhere?

Currently using nine.testrun.org and have nobody else to test with lol, but just myself :P

Edit: I just tested with a friend using the same chatmail server and they were using another. Was pretty quick.

[–] lordofflies@lemmy.ml 3 points 2 months ago

Neat, will check it out.

[–] lordofflies@lemmy.ml 1 points 4 months ago* (last edited 4 months ago) (1 children)

Same circuit with LM311 comparator

Made this two hours back, going to go and simulate this in the lab now, will get back with results later.

[–] lordofflies@lemmy.ml 3 points 4 months ago (1 children)

There is an IC tester in our lab and it says GOOD everytime I've plugged in. By die shots you mean like opening up the IC and viewing it under the microscope and testing it?

 

Hi folks, I've been trying to use LM311 to compare for a simple project, and it is depressing (to say the least) that my friends and I have not been able to get the comparator to work, I suspect that it is due to a knowledge gap, but our lab instructors keep saying, well the equipments here are for Educational Purposes and no one certifies them, and the LM311's are cheap and unreliable so it's not a big deal to not be able to compare voltages properly, for your project get IC's which are reliable and more expensive I personally hate this mindset, what are your thoughts, and if the problem indeed is knowledge gap (which it certainly is according to me, as I don't fully understand why the heck you need a pull up resistor with the thing) then do please tell me what I should be doing to catch up.

Thanks a lot for going through this post.. All answers are appreciated.

P.S. the project involves comparing a sine wave to get a square wave which is then fed to a T flip flop (made using JK flops that we have) to generate phase shifted waves as shown in the image attached, which is an LTspice simulation with the LM741s