Comments for The CircuitCalculator.com Blog http://circuitcalculator.com/wordpress a blog with live web calculators... Thu, 28 Aug 2008 15:25:48 +0000 http://wordpress.org/?v=2.0.7 Comment on PCB Stack-Up Design And Impedance Calculator by KARTHI http://circuitcalculator.com/wordpress/2007/05/12/pcb-stack-up-design-and-impedance-calculator/#comment-9364 Wed, 27 Aug 2008 10:08:09 +0000 http://circuitcalculator.com/wordpress/2007/05/12/pcb-stack-up-design-and-impedance-calculator/#comment-9364 VERY HELPFUL THANK YOU, NANDRI VERY HELPFUL THANK YOU, NANDRI

]]> Comment on Find Standard Resistor and Capacitor Values by sergiio http://circuitcalculator.com/wordpress/2006/01/21/find-standard-resistor-and-capacitor-values/#comment-8960 Thu, 14 Aug 2008 17:05:51 +0000 http://circuitcalculator.com/wordpress/2006/01/21/find-standard-resistor-and-capacitor-values/#comment-8960 You can also read a resistor using this website, no color chart needed, just choose the colors and will get you the value http://www.calculatemyresistor.com You can also read a resistor using this website, no color chart needed, just choose the colors and will get you the value

http://www.calculatemyresistor.com

]]> Comment on Calculator Wish List by Jasper http://circuitcalculator.com/wordpress/2006/03/03/calculator-wish-list/#comment-8955 Thu, 14 Aug 2008 12:33:29 +0000 http://circuitcalculator.com/wordpress/2006/03/03/calculator-wish-list/#comment-8955 I would want to have a parallel/series resistor calculator up to E192 (0.05%) and 2 resistors. I would want to have a parallel/series resistor calculator up to E192 (0.05%) and 2 resistors.

]]> Comment on PCB Antennas by J. L. Robinson http://circuitcalculator.com/wordpress/2008/04/25/pcb-antennas/#comment-8892 Tue, 12 Aug 2008 15:12:01 +0000 http://circuitcalculator.com/wordpress/2008/04/25/pcb-antennas/#comment-8892 Try EZNEC at http://www.eznec.com/ Try EZNEC at http://www.eznec.com/

]]> Comment on Dynamic Excel Chart Colors by Brad http://circuitcalculator.com/wordpress/2006/01/17/dynamic-excel-chart-colors/#comment-8782 Wed, 06 Aug 2008 17:16:32 +0000 http://circuitcalculator.com/wordpress/2006/01/17/dynamic-excel-chart-colors/#comment-8782 Bubba, Try something like: <code>Private Sub Worksheet_Change(ByVal Target As Range) For Each MyChart In ActiveSheet.ChartObjects For Each MySeries In MyChart.Chart.SeriesCollection MyVals = MySeries.Values Set MyPoints = MySeries.Points i = 1 For Each p In MyPoints v = MyVals(i) p.Interior.ColorIndex = ColorScheme(v) i = i + 1 Next Next Next End Sub </code> Bubba,

Try something like:

Private Sub Worksheet_Change(ByVal Target As Range)
For Each MyChart In ActiveSheet.ChartObjects
For Each MySeries In MyChart.Chart.SeriesCollection
MyVals = MySeries.Values
Set MyPoints = MySeries.Points
i = 1
For Each p In MyPoints
v = MyVals(i)
p.Interior.ColorIndex = ColorScheme(v)
i = i + 1
Next
Next
Next
End Sub

]]> Comment on Calculator Wish List by Rob http://circuitcalculator.com/wordpress/2006/03/03/calculator-wish-list/#comment-8236 Fri, 18 Jul 2008 10:23:09 +0000 http://circuitcalculator.com/wordpress/2006/03/03/calculator-wish-list/#comment-8236 A couple of calculators that might be useful to some people: Buck regulator (derive C1, C2 and L from Vin, Vout, Iout, F) Triac / thyristor quench (R and C from load inductance and dV/dt) But I appreciate these are somewhat obscure and won't be high on the list! A couple of calculators that might be useful to some people:

Buck regulator (derive C1, C2 and L from Vin, Vout, Iout, F)

Triac / thyristor quench (R and C from load inductance and dV/dt)

But I appreciate these are somewhat obscure and won’t be high on the list!

]]> Comment on Dynamic Excel Chart Colors by Bubba http://circuitcalculator.com/wordpress/2006/01/17/dynamic-excel-chart-colors/#comment-8229 Fri, 18 Jul 2008 03:58:07 +0000 http://circuitcalculator.com/wordpress/2006/01/17/dynamic-excel-chart-colors/#comment-8229 Can this same thing be done with more than 1 series? Can this same thing be done with more than 1 series?

]]> Comment on Find Standard Resistor and Capacitor Values by Ramesh http://circuitcalculator.com/wordpress/2006/01/21/find-standard-resistor-and-capacitor-values/#comment-8185 Wed, 16 Jul 2008 05:16:06 +0000 http://circuitcalculator.com/wordpress/2006/01/21/find-standard-resistor-and-capacitor-values/#comment-8185 Thank you for this useful Web site Thank you for this useful Web site

]]> Comment on Wire Parameter Calculator by Atul Bhardwaj http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/#comment-8150 Mon, 14 Jul 2008 09:05:09 +0000 http://circuitcalculator.com/wordpress/2007/09/20/wire-parameter-calculator/#comment-8150 Are these calculations valid for peak current or average current. We want to choose a gauge for 100 A peak current flowing for 200 microsec at 10 Hz. Kindly suggest which gauge is suitable? Atul Bhardwaj India ---Reply--- You could design for the RMS current. Brad http://circuitcalculator.com/rms.php Are these calculations valid for peak current or average current. We want to choose a gauge for 100 A peak current flowing for 200 microsec at 10 Hz. Kindly suggest which gauge is suitable?

Atul Bhardwaj
India

—Reply—
You could design for the RMS current. Brad
http://circuitcalculator.com/rms.php

]]> Comment on Four-Layer High-Speed PCB Design by Randy http://circuitcalculator.com/wordpress/2007/05/29/four-layer-high-speed-pcb-design/#comment-8050 Tue, 08 Jul 2008 17:19:42 +0000 http://circuitcalculator.com/wordpress/2007/05/29/four-layer-high-speed-pcb-design/#comment-8050 Many RF boards are built on 4 layers using layer 2 as GND, layer 1 for RF signal routing and avoiding vias whenever possible. By using layer 4 as controlled impedence, you are guaranteed the discontinuity of controlled impedance whenever vias are used. It may not be possible to route wholly or even largely on layer 1, the stackup given is a better solution in these cases. Many RF boards are built on 4 layers using layer 2 as GND, layer 1 for RF signal routing and avoiding vias whenever possible. By using layer 4 as controlled impedence, you are guaranteed the discontinuity of controlled impedance whenever vias are used. It may not be possible to route wholly or even largely on layer 1, the stackup given is a better solution in these cases.

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