Electronics Formulas - Revision history

ViciousCarnivore at 11:59, 19 February 2025

2025-02-19T11:59:17Z

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T05:48:05Z

High or Low Pass Filter

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T05:47:56Z

High or Low Pass Filter

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T05:47:12Z

High or Low Pass Filter

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T04:10:50Z

High or Low Pass Filter

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T03:04:32Z

High or Low Pass Filter

ViciousCarnivore: /* High or Low Pass Filter */

2025-02-17T03:04:03Z

High or Low Pass Filter

ViciousCarnivore: /* Capacitor Discharge */

2025-02-16T23:07:20Z

Capacitor Discharge

ViciousCarnivore: /* Capacitor Discharge */

2025-02-16T23:06:54Z

Capacitor Discharge

ViciousCarnivore at 23:06, 16 February 2025

2025-02-16T23:06:07Z

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 I'm going to try to keep some useful and practical formulas for electronics here.
-The goal will not be to have a million formulas, but to have the formulas that not so complex that you would rather use an online or spreadsheet calculator for them.
+The goal will not be to have a million formulas, and to have formulas that not so complex that you would rather use an online or spreadsheet calculator for them.
 ===List===

← Older revision		Revision as of 05:48, 17 February 2025
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	If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you might make this 2 * desired frequency per AoE, Student manual. Also, you can rearrange to calculate Capacitance, this being algebra. The formula is C=(1/(2πR * freq)). I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.		If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you might make this 2 * desired frequency per AoE, Student manual. Also, you can rearrange to calculate Capacitance, this being algebra. The formula is C=(1/(2πR * freq)). I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.
		+
	[[File:Formula for high or low pass filter.png\|\|\|]]		[[File:Formula for high or low pass filter.png\|\|\|]]

@@ Line 15: / Line 15: @@
 over 2πRC
-If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you might make this 2 * desired frequency per AoE, Student manual.
+If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you might make this 2 * desired frequency per AoE, Student manual. Also, you can rearrange to calculate Capacitance, this being algebra. The formula is C=(1/(2πR * freq)). I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.
 [[File:Formula for high or low pass filter.png|||]]

@@ Line 15: / Line 15: @@
 over 2πRC
-If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you would might make this 2 * desired frequency per AoE, Student manual. Of course, this is basic algebra, and the formula is C=(1/(2πR * freq)). I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.
+If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you might make this 2 * desired frequency per AoE, Student manual.
 [[File:Formula for high or low pass filter.png|||]]

@@ Line 15: / Line 15: @@
 over 2πRC
-If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you would might make this 2 * desired frequency per AoE, Student manual. Of course, this is basic algebra, and the formula is C=(1/(2πR)) * freq. I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.
+If you know your resistor (i.e. use a standard value, say 10k, 100k) you can reverse calculate the desired capacitance easily. Some of these values can be more or less memorized if you do this enough, given that a 2πR with R being a factor of 10 will always be 2π to some decimal point. That leaves the capacitance as the only variable. Note this is for the 3db point, or about 70%, and you would might make this 2 * desired frequency per AoE, Student manual. Of course, this is basic algebra, and the formula is C=(1/(2πR * freq)). I find this a bit more intuitive for some reason, as I usually know what frequency I want to block but do not know what capacitance to use.
 [[File:Formula for high or low pass filter.png|||]]

@@ Line 7: / Line 7: @@
 ==Capacitor Discharge==
-You should memorize this, and know the rules of thumb for a 1uF w/1kOhm or 1MOhm.
+You should memorize this, and know the rules of thumb for a 1uF w/1kOhm or 1MOhm. It is the easiest of all formulas, probably.
 T=RC.

@@ Line 5: / Line 5: @@
 Todo: enable math extension.
 ==High or Low Pass Filter==
 over 2πRC