Elektor 305 Circuits -

The original book provided specific copper-track layouts meant for chemical etching at home. Today, you can quickly test these circuits on a solderless breadboard or use free CAD software (like KiCad or EasyEDA) to order professionally manufactured PCBs for a few dollars.

Most components listed in the book are still widely available through distributors like DigiKey, Mouser, or local hobby shops. However, certain specialized RF transistors, older Germanium diodes, or specific CMOS IC variants may be obsolete. In these cases, modern equivalents (such as using a Schottky diode instead of a rare Germanium diode) can easily be substituted. From Breadboards to PCBs elektor 305 circuits