Yeah I noticed that it didn't like 1M, so I just used 1000k. But ok, Meg is what it wants.Another thing to be aware of is that the simulator is not case sensitive, so 100m and 100M are the same, and are interpreted as 0.1, If you want mega, you have to use Meg.
It's also possible that the simulator's parameters are not "normal", such as temperature. But I would imagine you are using the defaults unless you changed them in the past for some reason and it is remembering them.
Yes, I got the same 699mV at that node. Matches hand calc too.Try this as a test.
View attachment 286110
Eagle defaults to 25C. I changed it to 20 and 0C, even 1000C, didn't change anything. Not sure. These are the options:It's also possible that the simulator's parameters are not "normal", such as temperature. But I would imagine you are using the defaults unless you changed them in the past for some reason and it is remembering them.
That changing the temperature had no effect suggests that the transistor model it is using is very simplistic (i.e., the temperature coefficients have been left out).Eagle defaults to 25C. I changed it to 20 and 0C, even 1000C, didn't change anything. Not sure. These are the options:
View attachment 286148
I wouldn't believe, or use, any simulator that gives a Vbe of 0.9V at 20mA...Eagle defaults to 25C. I changed it to 20 and 0C, even 1000C, didn't change anything. Not sure. These are the options:
I found a different 2N3904 model, this one is really close to what you got:This is what LTSpice yields:
View attachment 286104
View attachment 286105
Vcc = 779.2 mV + 1.7491 mA · 4.7 kΩ = 9.0000 V
Ib = 20.808 mA - 19.059 mA = 1.749 mA
Still not credible.I found a different 2N3904 model, this one is really close to what you got:
IDK. I rarely use circuit simulators, and I certainly don't use ones that give bad results.So where can I find a legit 2N3904 model?
I have not breadboarded it yet.What voltages do you get with the real circuit?
Try snagging the model that LTSpice uses -- your simulator can probably eat it without too many hoops to jump through. If it can, you will have a much better apples-to-apples comparison of the two simulators.So where can I find a legit 2N3904 model?
When I tried this in PR everything was in spanish. But now it works:Try this one: https://www.multisim.com/
I've never seen any significant difference among any solders I've used. Solder is just solder...Oh my GOSH! It’s amazing!
What made it better?It is easily 5x better than anything I’ve ever used.
From what I can see, the joints look good. Do you have isopropyl alcohol to clean the flux from the board? That's why solder with a no-clean type of flux seems to be preferred these days. I have a few rolls with rosin flux, but the rest are no-clean.I’ve just started soldering the pots, there’s lots of extra flux around the joint.