The TSU Advisor

Information of particular value to SEPS students building projects.

Important note: The information in these pages constitutes no course material. It contains errors and must be used with discretion.

TSU Advisor index

* Conversion tables - inches to millimetres etc.

* Physical constants

* Decibels demystified - a guide to the unit

* Electronics Prototype System

* Preferred values

* Producing wound components

* Interface connectors - Pinouts, signals

* Logic circuit construction - the Enamel Wiring Pen

* Optoelectronics - the visible spectrum

* Personal Support

* Purchasing Guide - Where to obtain the part you want

* Voltage regulators

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Obtaining personal support

Please visit the Technical Services Unit between 10:30 and 11:30 on Thursdays. Richard Clarke will make every effort to be available then. If not then please ask for Eric Worpe.

You may also try contacting us at other times, or by e-mail.

[↑ TSU home page index]

Conversion tables

Conversion tables
From	To	Multiply by
acres	hectares	0.4047
arc minute	radians	2.9089E-04
arc second	radians	4.8481E-06
bars	pounds per square inch	14.508
centigrade	Fahrenheit	9/5 then add 32.0
degree of angle	radians	1.7453E-02
electron volts	joules	1.60210E-19
ergs	joules	1.0e-7
feet	metres	0.3048
gallon (UK)	litres	4.5461
gauss	teslas	1e-4
grams per litre	kilograms per metre³	1.0
hectares	acres	2.471
horsepower	watts	746
inches	metres	0.0254
inches	millimetres	25.4
kilometres	miles	0.6214
litres	gallons (UK)	0.21998
litres	pints	1.76
litres	metres³	0.001
metres	inches	39.37
miles	metres	1609.3
nautical miles	metres	1853.3
newtons	kilogramme-force	0.101972
ounces	grams	28.35
pint	litre	0.568
ton (UK)	kilograms	1 016.05
yard	metre	0.9144

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Preferred values for passive components

Preferred values
Value	E6	E12	E24
1.0	*	*	*
1.1	-	-	*
1.2	-	*	*
1.3	-	-	*
1.5	*	*	*
1.6	-	-	*
1.8	-	*	*
2.0	-	-	*
2.2	*	*	*
2.4	-	-	*
2.7	-	*	*
3.0	-	-	*
3.3	*	*	*
3.6	-	-	*
3.9	-	*	*
4.3	-	-	*
4.7	*	*	*
5.1	-	-	*
5.6	-	*	*
6.2	-	-	*
6.8	*	*	*
7.5	-	-	*
8.2	-	*	*
9.1	-	-	*

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Physical Constants

Quantities marked D are exact values by definition.

Physical Constants
Quantity	Symbol	Value	Unit
Permeability of a vacuum	μ₀	1.256 637×10^-6	H m^-1
Permittivity of a vacuum	ε₀	8.854 186×10^-12	F m^-1
Speed of light in a vacuum D	c	2.997 924 58×10⁸	m s^-1
Standard Gravity D	g_n	9.806 65	m s^-2

[↑ TSU home page index]

E-mail: R.Clarke@surrey.ac.uk

Last modified: 2010 January 13^th.

Value	E6	E12	E24
1.0	*	*	*
1.1	-	-	*
1.2	-	*	*
1.3	-	-	*
1.5	*	*	*
1.6	-	-	*
1.8	-	*	*
2.0	-	-	*
2.2	*	*	*
2.4	-	-	*
2.7	-	*	*
3.0	-	-	*
3.3	*	*	*
3.6	-	-	*
3.9	-	*	*
4.3	-	-	*
4.7	*	*	*
5.1	-	-	*
5.6	-	*	*
6.2	-	-	*
6.8	*	*	*
7.5	-	-	*
8.2	-	*	*
9.1	-	-	*

Value	E6	E12	E24
1.0	*	*	*
1.1	-	-	*
1.2	-	*	*
1.3	-	-	*
1.5	*	*	*
1.6	-	-	*
1.8	-	*	*
2.0	-	-	*
2.2	*	*	*
2.4	-	-	*
2.7	-	*	*
3.0	-	-	*
3.3	*	*	*
3.6	-	-	*
3.9	-	*	*
4.3	-	-	*
4.7	*	*	*
5.1	-	-	*
5.6	-	*	*
6.2	-	-	*
6.8	*	*	*
7.5	-	-	*
8.2	-	*	*
9.1	-	-	*

Value	E6	E12	E24
1.0	*	*	*
1.1	-	-	*
1.2	-	*	*
1.3	-	-	*
1.5	*	*	*
1.6	-	-	*
1.8	-	*	*
2.0	-	-	*
2.2	*	*	*
2.4	-	-	*
2.7	-	*	*
3.0	-	-	*
3.3	*	*	*
3.6	-	-	*
3.9	-	*	*
4.3	-	-	*
4.7	*	*	*
5.1	-	-	*
5.6	-	*	*
6.2	-	-	*
6.8	*	*	*
7.5	-	-	*
8.2	-	*	*
9.1	-	-	*