KiCad Spice, Anyone Tried It?

Started by Ricketty C in sci.electronics.design17 minutes ago 88 replies

I didn't realize KiCad has a spice simulator built in. Anyone used it? I could have been editing my board schematic and doing the simulation at...

I didn't realize KiCad has a spice simulator built in. Anyone used it? I could have been editing my board schematic and doing the simulation at the same time! I don't know how compatible models are with various simulators. I contacted one vendor about a problem with their spice model and they basically blew me off saying I needed to use Orcad spice. lol I guess when you've seen one s...


Any tricks to winding high ratio, high impedance RF transformers

Started by amdx in sci.electronics.design30 minutes ago 41 replies

I just wound what I thought would be a 350? to 23k? AM BCB transformer. I put a 23k?n the secondary and the primary measures R=14? and X=...

I just wound what I thought would be a 350? to 23k? AM BCB transformer. I put a 23k?n the secondary and the primary measures R=14? and X= -43? at 1MHz. I used a #73 Binocular core. Looking for about 8, 9, or 10 to 1 turns ratio. The inductances measure correct and the step up voltage measures correct. I'm guessing the problem is winding capacitance. But, I'm not sure. Any tricks to


What is the most powerful audio output tube?

Started by Anonymous in sci.electronics.design1 hour ago 161 replies

What is the most powerful audio output tube, as far as RMS wattage output? I have gotten some powerful sound from four 6L6 tubes in...

What is the most powerful audio output tube, as far as RMS wattage output? I have gotten some powerful sound from four 6L6 tubes in push-pull parallel. but I want more. I know it's possible to use eight 6L6 tubes, which I believe is called " push-pull parallel - parallel", but I'm looking into other possible tubes. At one time, I thought the 807 tube was more powerful than the 6L6, but...


Fascist USA orange pig

Started by Anonymous in sci.electronics.design3 hours ago 41 replies

Trump must resign.

Trump must resign.


China delayed releasing coronavirus info, frustrating WHO

Started by Anonymous in sci.electronics.design8 hours ago 38 replies

How China stonewalled WHO and the World: https://apnews.com/3c061794970661042b18d5aeaaed9fae

How China stonewalled WHO and the World: https://apnews.com/3c061794970661042b18d5aeaaed9fae


About a toner transfer technique

Started by Pimpom in sci.electronics.design9 hours ago 3 replies

After years of using the iron-on technique to make prototype and one-off PCBs, I decided to try another method I found in a YouTube video that...

After years of using the iron-on technique to make prototype and one-off PCBs, I decided to try another method I found in a YouTube video that doesn't involve heat - https://www.youtube.com/watch?v=cVhSCEPINpM The essential part is from 00:40 to 5:00. It works fine and I got a near-perfect result the first time - better in fact than I expected on a first attempt. But a couple of thi...


screening

Started by legg in sci.electronics.design10 hours ago 26 replies

I've got all sorts of little circuits that used biscuit/altoid/ammobox type tins for local screening. Today I stuck my cell phone in a...

I've got all sorts of little circuits that used biscuit/altoid/ammobox type tins for local screening. Today I stuck my cell phone in a biscuit tin and it picked up. This was not expected. Comments anyone? RL


CORONAVIRUS PIECE BY PIECE - Biologists are working at breakneck speed to solve the structures of key SARS-CoV-2 proteins

Started by Joe Gwinn in sci.electronics.design12 hours ago 5 replies

More background. Open access. . Nature | Vol 581 | 21 May 2020 Feature Joe Gwinn

More background. Open access. . Nature | Vol 581 | 21 May 2020 Feature Joe Gwinn


TI's Web Bench question

Started by John S in sci.electronics.design15 hours ago 9 replies

I can't find a way to get TI's model into LTspice. So, I tried TI's online simulator. It does not give a reasonable output even using their...

I can't find a way to get TI's model into LTspice. So, I tried TI's online simulator. It does not give a reasonable output even using their default schematic. And, it is glacially slow -- they say it might take up to 15 minutes to complete an analysis. Has anyone else had this problem?


Motor Controller Flyback

Started by Ricketty C in sci.electronics.design19 hours ago

I've been asked to include a motor controller on a board I am designing. The motor is from Pololu https://www.pololu.com/product/4756 The...

I've been asked to include a motor controller on a board I am designing. The motor is from Pololu https://www.pololu.com/product/4756 The controller is a VNH5019 from ST https://www.st.com/content/ccc/resource/technical/document/datasheet/1c/26/60/a8/3e/70/4c/e1/CD00234623.pdf/files/CD00234623.pdf/jcr:content/translations/en.CD00234623.pdf It seems they recommend a capacitor


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