Oops, hug-o-death, sorry. It seems at first glance like the author went to a lot of trouble, hacking an EEPROM programmer together by hand, working past documentation bugs, and so forth. But we really lived that way! Especially if we had more spare time than money, and no access to the latest commercial gear or up-to-date literature.
DS18B20 one-wire bus temperature sensor with old school LED 7 segment displays