01_Basic Electrical Calculations

Name FreqSweep Time 5.0E+0 60.0E+6 200.0E-3 5Sweep Time 10.0E+0 30.0E+6 100.0E-3 10Sweep Time 20.0E+0 15.0E+6 50.0E-3 20Sweep Time 50.0E+0 6.0E+6 20.0E-3 50

60 cycle 60.0E+0 5.0E+6 16.7E-3 60Sweep Time 100.0E+0 3.0E+6 10.0E-3 100

120 cycle 120.0E+0 2.5E+6 8.3E-3 120Sweep Time 200.0E+0 1.5E+6 5.0E-3 200

400.0E+0 749.5E+3 2.5E-3 400Sweep Time 500.0E+0 599.6E+3 2.0E-3 500

1 Kh 1.0E+3 299.8E+3 1.0E-3 1000Sweep Time 1.0E+3 299.8E+3 1.0E-3 1000Sweep Time 2.0E+3 149.9E+3 500.0E-6 2000Sweep Time 5.0E+3 60.0E+3 200.0E-6 5000

10 Kh 10.0E+3 30.0E+3 100.0E-6 10000Sweep Time 10.0E+3 30.0E+3 100.0E-6 10000

TV IF 15.8E+3 19.0E+3 63.5E-6 15750Sweep Time 20.0E+3 15.0E+3 50.0E-6 20000Sweep Time 50.0E+3 6.0E+3 20.0E-6 50000

100 Kh 100.0E+3 3.0E+3 10.0E-6 100000Sweep Time 100.0E+3 3.0E+3 10.0E-6 100000Sweep Time 200.0E+3 1.5E+3 5.0E-6 200000Sweep Time 500.0E+3 599.6E+0 2.0E-6 500000

AM Broadcast 1.0E+6 299.8E+0 1.0E-6 1000000Sweep Time 1.0E+6 299.8E+0 1.0E-6 1000000

Fastest Sweep Time 2.0E+6 149.9E+0 500.0E-9 2000000TV IF 3.6E+6 83.7E+0 279.3E-9 358000080 meters 3.7E+6 80.0E+0 266.9E-9 3747400.0062540 meters 7.0E+6 42.8E+0 142.9E-9 7000000

10.0E+6 30.0E+0 100.0E-9 10000000Pentium clock 90.0E+6 3.3E+0 11.1E-9 90000000FM Broadcast 100.0E+6 3.0E+0 10.0E-9 1000000002 meters 146.0E+6 2.1E+0 6.8E-9 146000000

100x fastest sweep 200.0E+6 1.5E+0 5.0E-9 200000000Low microwave, 1 m 299.8E+6 1.0E+0 3.3E-9 299792000.5460 Mh Band 460.0E+6 651.7E-3 2.2E-9 460000000Microwave, Radar 1.0E+9 299.8E-3 1.0E-9 100000000023 Cm band 1.3E+9 236.1E-3 787.4E-12 1270000000Solar flux test freq 2.8E+9 107.1E-3 357.1E-12 280000000010 Gh (ham band?) 10.0E+9 30.0E-3 100.0E-12 100000000003 mm 100.0E+9 3.0E-3 10.0E-12 100000000000Microwave / Infrared, 1 mm 299.8E+9 1.0E-3 3.3E-12 299792000500.1 mm 3.0E+12 100.0E-6 333.6E-15 2.99792E+12Infrared 4.4E+12 68.0E-6 226.8E-15 4.409E+12Infrared / red light boundary 389.3E+12 770.0E-9 2.6E-15 3.893403E+14Low UV light 749.5E+12 400.0E-9 1.3E-15 7.4948E+14High blue light 768.7E+12 390.0E-9 1.3E-15 7.686974E+14UV / Xray boundary 74.9E+15 4.0E-9 13.3E-18 7.4948E+16

Wavelength (Meters)

Period (Seconds)

Calculated Freq (Temp)

Freq * Wavelength

= C ==>

A1

This is just a reference table of some commonly used frequencies. "Sweep Time" indicates that the Period column corresponds to a labelled interval on my oscilloscope. Using this setting, a wave of the given frequency will occupy 1 cm. on the scope.

B1

You can add frequencies at the bottom, select any cell in the Freq column, then use Data|Sort to resort the table by Freq.

E1

Obsolete: If you know only the wavelength, use the FreqCalcs worksheet to get the frequency.

A35

You might be able to see spikes at this freq, 1/100th cm wide.

A48

This description has to be wrong. Maybe it's high UV.

299.8E+6 meter / sec

G1

This is the exact speed of light. This cell value is used in calculations.

FreqCalcs

Frequency and Wavelength Calculations C = F * W

Workspace Result Results

IsFrequency Wavelength Frequency Wavelength

Hertz Meters Hertz Meters Centimeters Inches521.500E+6 Valid 521.500E+6 574.865E-3 57.486E+0 22.63247299521.500E+6 Valid 521.500E+6 574.865E-3 57.486E+0 22.63247299

Wire Diameter 0.125 Wavelength / Diameter = 181.060E+0 (Find K in ARRL book table)

Loop Quad Inches Feet Feet + InchesReflector 1030 / Freq (Mh) 23.701 1.975 1.000 11.701Driven Element 1005 / Freq (Mh) 23.126 1.927 1.000 11.126Directors 975 / Freq (Mh) 22.435 1.870 1.000 10.435.15 Spacing 3.395 0.283 0.000 3.395.20 Spacing 4.526 0.377 0.000 4.526

Wire Dipole

Long Wire Halves Inches Feet Feet + Inches1 2 22.076 1.840 1.000 10.0762 4 44.719 3.727 3.000 8.7193 6 67.361 5.613 5.000 7.3614 8 90.003 7.500 7.000 6.0035 10 112.646 9.387 9.000 4.6466 12 135.288 11.274 11.000 3.2887 14 157.931 13.161 13.000 1.9318 16 180.573 15.048 15.000 0.5739 18 203.215 16.935 16.000 11.215

10 20 225.858 18.821 18.000 9.858

Blank out the unknown variable

Read Answer Here

A9

For trial and error or multiple problems, drag (use AutoFill) the entire next line downward to create as many new calculation lines as you need. But Goal Seek or Solver may be more efficient.

A10

This line exists only to hold the formulas for AutoFill, in case you want to create more calculation lines.

G12

Try to find or derive formula for K.

A16

Unlike a dipole, element lengths are LONGER than free space wavelength.

A18

Spacings use free space wavelength.

FreqCalcs

Feet Ft + In1.886039 1 10.632471.886039

(Find K in ARRL book table)

Ohm's Law

Worksheet for Ohm's Law Calculations Create user-defined functions for these, also?You can use Goal Seek or Solver to find specific values

Workspace Result ResultsBlank out the unknown variable Is Read Answer Here

V I R V = I * R I = V / R R = V / I V * IVolts Amps Ohms Volts Amps Ohms Watts13.8 1.7 Valid 13.8 1.700 8.12 23.4613.8 1.7 Valid 13.8 1.700 8.12 23.46

A8

For trial and error or multiple problems, drag (use AutoFill) the entire next line downward to create as many new calculation lines as you need. But Goal Seek or Solver may be more efficient.

A9

This line exists only to hold the formulas for AutoFill, in case you want to create more calculation lines.

Ohm's Law

Create user-defined functions for these, also?

Resistance

Series Resistance Voltage Test Points CurrentSeries Percent Input (+) Drop Output (-) Current

R Total 13.80 13.80 0.00 AmpsR1 5.0E+0 0.59 13.80 8.09 5.71 1.61781946073R2 3.5E+0 0.41 5.71 5.71 0.00 1.61781946073R3 0.00R4 0.00R5 0.00R6 0.00R7 0.00R8 0.00

Total R 8.5E+0 1.00 13.80 1.61781946073

Parallel Resistance Voltage CurrentSeries Parallel Input (+) Drop Output (-) Current

R R 8.09 8.09 0.00 AmpsR1 10.0E+0 0.1 0.80890973036R2 10.0E+0 0.1 0.80890973036R3R4R5R6R7R8R9

R10R11R12R13R14R15R16R17R18R19R20R21R22R23R24R25

Total R 20.0E+0 5.0E+0 1.61781946073

A1

Enter data in gray. Read answer in green. Other cells are locked intermediate figures. Use constant units, Ohms, Megohms, etc.

D3

The voltage applied at the start of the series of resistors. (Either positive or negative is ok.)

F3

The voltage that appears at the end of the series of resistors. This value is usually zero. Other values allow calculating for partial circuits.

B4

It might be useful to allow auto-transfer (by a macro button?) of a total parallel resistance (from below) into the first available slot here, so you could build the series equivalent circuit, calculating the parallel branches as you go. Not implemented.

E12

If this does not equal E3, something is wrong.

G12

If this is not the same as all values in the column above, something is wrong, because the same amount of current must flow through all the portions of the series circuit.

A14

Enter data in gray. Read answer in green. Other cells are locked intermediate figures. Use constant units, Ohms, Megohms, etc.

D16

The positive voltage applied at the start of the network of resistors.

F16

The less positive voltage that appears at the end of the series of resistors. This value is usually zero. Other values allow calculating for partial circuits. (allowable for a parallel network?)

G16

This is the current passing through each resistor shown at left (R1, R2, etc.). The total below is the total going through the circuit. Each resistor you use must have a power rating greater than that in the next column to the right.

B42

This column is for entering the resistor values only. This is a parallel circuit, and the series total is meaningless. Read the parallel resistance from the next column to the right.

Resistance

CurrentPowerWatts

13.0866990389.2392095205

22.325908558

CurrentPowerWatts

6.54334951886.5433495188

13.086699038

H3

Watts dissipated by each resistor in the circuit. Each resistor you use must exceed the power rating shown for it here.

H16

Each resistor's power rating must exceed this number for R1, R2, etc.

Capacitance

Capacitors in series and parallel. Create user-defined functions for these, also?Enter data in gray. Read answer in green.Use constant units, Microfarads, Picofarads, etc.

Capacitance Capacitive Reactance (Xc)Parallel Series Capacitance Frequency Reactance

C C Farads Hertz OhmsC1 1 1.000 Microfarads Megahertz OhmsC2 2 0.500 0.00047 7.15 47.36C3 4 0.250C4 0.000C5 0.000C6 0.000C7 0.000C8 0.000

Net C 7 0.571

Inductance

Inductors in series and parallel. Create user-defined functions for these, also?Enter data in gray. Read answer in green. Other cells are locked intermediate figures.Use constant units, Millihenrys, Microhenrys, etc. Calculations are valid only if coils are far apart.

Inductance Inductive Reactance (XL)Series Parallel Inductance Frequency Reactance

L L Henrys Hertz OhmsL1 500 0.002 Millihenrys Kilohertz OhmsL2 1200 0.000833333 Microhenrys Megahertz OhmsL3 0 15 14 1319.47L4 0L5 0L6 0L7 0L8 0

Net L 1700 352.941

A1

Formulas are the same as for resistors.

Impedance

Sheet Reserved for Impedance Calculations Create user-defined functions for these, also?Enter data in gray. Read answer in green. Other cells are locked intermediate figures.Unfinished (unstarted!) The tables copied here may or may not prove useful. See ARRL Handbook page 2-22.

Resistance See SOLVSAMP.XLS!Engineering Design Series Parallel for an example circuit layout.

R 1 / R RR1 500 0.002 500R2 1200 0.000833333 1200R3 0 0R4 0 0R5 0 0R6 0 0R7 0 0R8 0 0

Net R 1700 0.002833333 352.9412

Ohms Law for ReactanceYou can use Goal Seek or Solver to find specific values

Workspace Result Results

Blank out the unknown variable Is Read Answer Here V = I * R I = V / R R = V / I V * I

Volts Amps Ohms Volts Amps Ohms Watts5 10 Valid 5 0.5 10 2.55 10 Valid 5 0.5 10 2.5

A25

For trial and error or multiple problems, drag (use AutoFill) the next line downward to create as many new calculation lines as you need. But Goal Seek or Solver may be more efficient.

Impedance

Create user-defined functions for these, also?

Unfinished (unstarted!) The tables copied here may or may not prove useful. See ARRL Handbook page 2-22.

See SOLVSAMP.XLS!Engineering Design

RS-232 Signal and pin definitions.

Abbr Description From To Explanation

1 FG == Frame Ground

3 2 TxD <---- Transmitted Data DTE DCE

2 3 RxD ----> Received Data DCE DTE

8 4 RTS <---- Request to Send DTE DCE

7 5 CTS ----> Clear to Send DCE DTE

4 6 DSR ----> Data Set Ready DCE DTE

5 7 SG == Signal Ground Return path for signal current1 8 ----> DCE DTE

9 v+ == Positive DC test voltage10 v- == Negative DC test voltage11 QM ----> Equalizer Mode DCE DTE12 ----> Secondary DCD DCE DTE

13 SCTS ----> Secondary CTS DCE DTE14 STxD <---- Secondary TxD DTE DCE14 NS <---- New Sync DTE DCE15 TxC ----> DCE DTE

16 SRxD ----> Secondary RxD DCE DTE16 DCT ----> Divided Clock Transmitter DCE DTE

17 RxC ----> Receiver Clock DCE DTE18 DCR ----> Divided Clock Receiver DCE DTE18 LL Local Loopback19 SRTS <---- Secondary RTS DTE DCE

6 20 DTR <---- Data Terminal Ready DTE DCE

21 SQ ----> Signal Quality Detect DCE DTE9 22 RI ----> Ring Indicator DCE DTE

23 <---- Data Rate Selector DTE DCE23 ----> Data Rate Selector DCE DTE24 ETxC <---- DTE DCE

25 <---- Busy DTE DCE25 TM Test Mode

DB9

DB25

Direction DCE <> DTE

Connects equipment chassis to prevent electrical shock.

Transmit line for DTE Receive line for DCE

Receive line for DTE Transmit line for DCE

Tells the modem that the TERMINAL or computer is ready to transmit data.

Tells the terminal or computer that the MODEM is ready to accept data for transmission.

Indicates that the MODEM is ready to establish the communications link and exchange control characters to begin data transmission.

DCD RLSD

Data Carrier Detect Received Line Signal Detector

Indicates that the MODEM has detected the data carrier of the remote modem.

SDCD SRLSD

Transmitter Clock DCE Source

Indicates that the TERMINAL or computer is ready to establish the communications link and exchange control characters to begin data transmission.

Indicates that the modem has received a ring signal on the telephone line.

External Transmitter Clock DTE Source


1

2

3

4

5

6

78

9101112

13141415

1616

1718181920

2122

232324

2525

DB25


Y AA 101

Y BA 103

Y BB 104

Y CA 105

Y CB 106

Y CC 107

Y AB 102Y CF 109

XSCF 122

SCB 121SBA 118

XDB 114

SBB 119X

DD 115X

SCA 120Y CD 108.2

CG 110Y CE 125

CH 111CI 112DA 113

Com-mon

EIA Circuit

CCITT v24

Bell 208A

A1

An old note with this table said "for porting table to Access database". Never did it; not sure why I intended to.

ELECTRIC.XLSCopyright (C)2001 Steven Whitney. Published under GNU GPL (General Public License) Version 2, with ABSOLUTELY NO WARRANTY.Initially published by http://25yearsofprogramming.com.

This program is free software; you can redistribute it and/ormodify it under the terms of the GNU General Public LicenseVersion 2 as published by the Free Software Foundation.

This program is distributed in the hope that it will be useful,but WITHOUT ANY WARRANTY; without even the implied warranty ofMERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See theGNU General Public License for more details.

You should have received a copy of the GNU General Public Licensealong with this program; if not, write to the Free SoftwareFoundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.

01_Basic Electrical Calculations

Documents

Transcript of 01_Basic Electrical Calculations