In Germany, Austria, and Switzerland, you can order single back issues via the hotline: +49 (0) 89 123 456 (verify number on current website). Shipping to the EU takes 5–7 days. International shipping is possible but expensive (€15+).

Go to the official Jahr Top Special Verlag webshop. Search for "Sonnenfreunde Sonderheft 156." You can buy a DRM-free PDF. Pro tip: The PDF includes clickable plant names that link to care databases—something the physical copy lacks.

A forward-looking chapter that described how to interface your solar system with early digital command control (DCC) systems. It included simple transistor-based optocoupler circuits to convert solar power status into DCC feedback messages—a concept far ahead of its time.

If you are considering purchasing this issue (either as a physical back issue or a PDF download), here are the three most valuable features inside.

The magazine was printed on slightly lower-quality recycled paper (a cost-cutting measure). The centerfold PCB template—often removed and used directly for etching—is missing in most surviving copies. A complete copy with the original fold-out intact is extremely rare.

If you cannot find this issue, consider these comparable special editions:

Sonnenfreunde Sonderheft Magazine 156 May 2026

In Germany, Austria, and Switzerland, you can order single back issues via the hotline: +49 (0) 89 123 456 (verify number on current website). Shipping to the EU takes 5–7 days. International shipping is possible but expensive (€15+).

Go to the official Jahr Top Special Verlag webshop. Search for "Sonnenfreunde Sonderheft 156." You can buy a DRM-free PDF. Pro tip: The PDF includes clickable plant names that link to care databases—something the physical copy lacks.

A forward-looking chapter that described how to interface your solar system with early digital command control (DCC) systems. It included simple transistor-based optocoupler circuits to convert solar power status into DCC feedback messages—a concept far ahead of its time.

If you are considering purchasing this issue (either as a physical back issue or a PDF download), here are the three most valuable features inside.

The magazine was printed on slightly lower-quality recycled paper (a cost-cutting measure). The centerfold PCB template—often removed and used directly for etching—is missing in most surviving copies. A complete copy with the original fold-out intact is extremely rare.

If you cannot find this issue, consider these comparable special editions: