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Contents of Electronics section

A few notes about 555 timers

3-phase sine-wave generator

Mixers

volts or Volts?  V or v?

Amplifier power

Amplifier clipping

"RMS" watts

Earth? Ground?

Earth Leakage Protection

Low power r.f. measurement

H.F. Directional Power Meter

 Time mark generator/Calibration voltage source

Using l.e.d.s

Transistor astable multivibrator

Resistor colour codes

Rectifier relationships

A few words about decibel notation

The Care and Feeding of Nicads

Audio Sweep Generator

Vehicle immobiliser

Telephone off-hook indicator

Motor-cycle dual intensity tail light

Conversion Tables

Temperature conversion

The Superposition and Thévenin's theorems

"Flybacks"

"A bit about capacitors"

 

 

 

 

 

Interested in amateur radio?

Click on the logo to go to QRZ

 

 

 

 

 

If you would like a Smith Chart screensaver you can download a static one here.

If you prefer one which moves slowly around the screen download this one. 

Both of them are negative images, are much more detailed than the skeleton one above, and have black backgrounds.  The chart itself is red.

Neither of them are self-installing.  You will need to put them in either the c/windows or the c/windows/system32 folder.

You can also run them from the desktop.

 

 

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I have had the following items published in "Electronics World" 

Article

"Sweep Generator, Pure and Simple"

February

1992

See an edited version  above.

Circuit Ideas

Single-cycle sinewave generator

August

1990

  p685

Tone-burst gate

November

1990

  p988

555 with less than 1:1 m/s ratio

December

1990

  p1078

Offset cancellation in the XR-2206

March

1991

  p240

Mic pre-amp

August

1992

  p684

Accented metronome

 November

1991

  p684

 ..... but I think I like Terry Pinnell's better.

 

 

 

 

FlashButtons

 

 

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