Let's talk about electronics


Close-up of a ham radio transciever


Picture of a GSM1800 ground plane antenna

Gas discharge and glow lamps:

Picture of a neon glow lamp

Radiation detection:

Picture of a geiger tube

General projects:

Picture of an assembled printed circuit board

General tools and tips:

Picture of a multimeter

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 (which is 0.1 μF, if you prefer).