The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

A resource for technical documentation. Datasheets, application notes, instruction manuals, books and links to resources are found in the Document Library.
Post Reply
User avatar
mediatechnology
Posts: 4698
Joined: Sat Aug 11, 2007 2:34 pm
Location: Oak Cliff, Texas
Contact:

The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

Post by mediatechnology » Sat Feb 16, 2019 5:06 pm

This site started out as a simple exercise in web page making that sort of got out of control. Once I started writing, I found it hard to stop.
Everything you ever wanted to know about capacitors:

The Capacitor Site: "I Equals C(dV/dt)" http://iequalscdvdt.com
https://ka-electronics.com

“Diet, injections, and injunctions will combine, from a very early age, to produce the sort of character and the sort of beliefs that the authorities consider desirable, and any serious criticism of the powers that be will become psychologically impossible.” – The Impact of Science on Society (1953) by Bertrand Russell, p.50

Dr. Sherri Tenpenny Exposes 10 Deadly Dangers of Pzifer/Johnson & Johnson Covid-19 Vaccines: "This is a well-designed killing tool." https://waynekirkwood.com/content/Docto ... accine.mp4
Plandemic Series: "Pland3mic - Indoctornation" https://waynekirkwood.com/content/Pland ... nation.mp4
Plandemic Series: "Plandemic - Doctors In Black" https://waynekirkwood.com/content/Plandemic.mp4

brianroth
Posts: 91
Joined: Mon Jun 17, 2013 2:11 pm
Location: Salina, Kansas
Contact:

Re: The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

Post by brianroth » Sun Feb 17, 2019 1:19 am

What a great link, Wayne! For me, it's a refresher course as well as a lot of "....hmmm learned something new today"

Interesting coincidence, but in the past week or so I discovered a new line of TDK branded MLCC C0G/NPO caps in axial/thru-hole packages at Mouser. I just messed with the Mouser filters, and they stock up to 0.22 uF ($1.32 in singles, 5 mm lead spacing, which is kinda small for that amount of uF).

Reading about C0G caps in audio applications ( see John Hardy's website and elsewhere) I tend to no longer hate ceramics...LOL.

Bri
Professional audio and video systems design/installation/maintenance.
www.BrianRoth.com

Gold
Posts: 626
Joined: Sat Dec 01, 2007 6:20 pm

Re: The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

Post by Gold » Sun Feb 17, 2019 12:34 pm

I’m closing in on finishing building my T-filter EQ’s. I’m using polystyrene caps for the lower value in the tuning sections.

I want to try using C0G ceramics in those positions in the Barry Porter SVF EQ instead of Polypropylene or polystyrene.

User avatar
JR.
Posts: 3657
Joined: Sat May 24, 2008 7:21 pm
Contact:

Re: The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

Post by JR. » Sun Feb 17, 2019 3:51 pm

I love polystyrene and used piles of them in my kit company back in the 70's -80's, but they were not robust enough for large scale manufacturing processes.

NPO/COG ceramic will be suitably neutral (linear) and more robust.

JR
Cancel the "cancel culture", do not support mob hatred.

Gold
Posts: 626
Joined: Sat Dec 01, 2007 6:20 pm

Re: The Capacitor Site: "I Equals C*dV/dt" iequalscdvdt.com

Post by Gold » Sun Feb 17, 2019 4:53 pm

The polystyrene sound good. The low band needs a 4.7uf and a 3.3 nf All Electronics has some large values for cheap. I got 100pcs of 5000pf for $7.50. Two in parallel and one in series gets me to 3.333nf. I actually got 200 pcs and hand selected to nail the absolute value. I never would have figured that out without the handy Electronic Toolbox Pro.

Post Reply