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: 3787
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

Tommy Robinson Sentenced to Nine Months in Prison: https://www.breitbart.com/europe/2019/0 ... sentenced/
Facebook Sanctions Violent Threats Against ‘Dangerous Individuals’: https://www.breitbart.com/tech/2019/07/ ... dividuals/
The Most Banned Network In The World: https://www.infowars.com/show

brianroth
Posts: 79
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: 537
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: 2814
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
Visit https://circularscience.com to hear what properly "cleared" drums sound like.

Gold
Posts: 537
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