Let's talk about electronics


Part of an antenna diagram       
Bullet A short antenna tuner (11.2011)
Bullet Satellite antenna bearing calculator (08.2013)
Bullet Beware of cable losses (09.2012)
Bullet Antenna tools (11.2012)


Part of a receiver diagram       
Bullet The tandem match - a closer look (08.2013)
Bullet A long-wave SWR meter (01.2012)
Bullet A long and medium-waves CW transmitter (05.2012)
Bullet A cheap long-waves and medium-waves kilowatt dummy load (06.2012)
Bullet An up-converter for receiving long and very long waves (08.2014)
Bullet A few words on diode clipper distorsion (09.2014)
Bullet A simple AM modulator (02.2011)
Bullet Crystal ladder filters (05.2005)
Bullet Fixed attenuators (11.2005)
Bullet Measuring the Q-factor of a resonator with the ring-down method (12.2014)
Bullet Ham radio stuff (10.2013)
Bullet Swiss broadcast stations (12.2016)

Other electronics:

Part of a schematic diagram       
Bullet Calculating power transformers (12.2011)
Bullet Measuring the power factor with the three voltmeters method (11.2014)
Bullet Calculating heat sinks (11.2013)
Bullet Troubleshooting switch mode power supplies (11.2013)
Bullet A simple passive logarithmic VU-meter (01.2013)
Bullet NTC calculator (11.2009)
Bullet Applications of neon glow lamps (08.2010)
Bullet Some measurements on a fluorescent tube and its magnetic ballast (04.2017)
Bullet Fun with Geissler tubes (05.2016)
Bullet A lightning flash counter (01.2017)
Bullet A C-MOS digital clock (11.2014)
Bullet Quick documents (11.2009)
Bullet Various articles (11.2009)
Bullet The simplest light bulb blinker, ever (12.2013)
Bullet A 555-based comet-shaped Christmas flasher (12.2015)

A few remarks

Not everybody around the world describes electronics in the same way: the convention used on this page is strongly inspired by the European habits and it may differ from what you're used to. For example, the voltage is symbolized by the letter U, the current by the letter I, resistors are drawn with a rectangular symbol, the current flows from the positive terminal to the negative terminal and the voltage is represented by an arrow pointing from the positive to the negative potential, in the same sense as the electric field.

Some of the conventions used on this site.
Some of the conventions used on this site.

On the schematic diagrams of this site, component values are expressed with an "abbreviated engineering notation", where the multiplier (or unit symbol) is also used as decimal point. So, a resistor marked "1M5" is 1.5 MΩ, another resistor marked "0R22 2W5" is 0.22 Ω - 2.5 W, a capacitor marked "8n2" is 8.2 nF or a Zener diode marked "5V1 0W5" is 5.1 V - 0.5 W. Of course, a capacitor marked "100n" is a 100 nF one.