Burkhard Kainka (1953) — ham radio operator with the callsign DK7JD, worked for many years as a physics teacher. Since 1996 he is an independent developer and author in the fields of electronics and microcontrollers. Burkhard runs the websites www.elektronik-labor. de and www.b-kainka.de, with his contributions to the Hobby Corner and a general fondness for the basics of electronics.