It seems you are looking for a or key characteristic of the book 300 Circuits (from Elektor Electronics).
Since I cannot browse the live internet or access specific PDF files directly, here is a breakdown of the of the classic Elektor "300 Circuits" volumes (often referred to as "300 schakelingen" in Dutch or "300 Circuits" in English). 300 Circuits Elektor Pdf
Search Google for: Elektor 300 Circuits shop (look for the Elektor.com store). It seems you are looking for a or
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