Homebuilt kit The ELF II was originally described in a construction article in Popular Electronics magazine published as a four-part series in 1976- 77. It was based on the RCA 1802 mciroprocessor and offered the first wave of microcomputer enthusiasts an inexpensive means of learning about both hardware and software. Popular kit based on RCA 1802 CPU. 256 x 8-bit static RAM (2101); hex input keypad; 2 x 7-segment display. Very poor soldering; requires re-solder + flux removal/degreasing. Questionable whether this ever worked given poor construction quality. The ELF II was the result of a kit construction article in Popular Electronics originally published as a four-part series in 1976-77. Sequence of articles is: "Build the COSMAC 'ELF' A Low-Cost Experimenter's Microcomputer" Part 1: August 1976. Part 2: September 1976 Part 3: March 1977 Part 4: July 1977 (which introduced the Netronics ELF II).