{
  "annotation_id": "83469883-fb0b-4be2-8dbd-c1ea126521e2",
  "date_created": "2026-03-02T18:00:39.380000Z",
  "date_modified": "2026-03-02T18:00:39.380000Z",
  "file_hash": "40defec107c77d46224a75c716419fa0d36da437c56060f5ba0b36f0043f1c52",
  "private": false,
  "record": {
    "abstract": "An inexpensive analog-to-digital converter has been built around the game\nport of the IBM personal computer. Using a single field effect transistor (FET)\nand three carbon resistors, it allows the game card to measure voltage, instead\nof its usual measurement of resistance. Since power for the FET is drawn from\nthe game port, the total cost of components, external to the computer, is very\nlow at about one U.S. dollar. The converter is linear enough for many\napplications, and is presently used to study the complex free decay of a long\nperiod physical pendulum. Software support is via QuickBasic, and the\nhardware/software package design was influenced by a consideration of amateur\nseismology needs.",
    "arxiv_id": "physics/0202023",
    "authors": [
      "Randall D. Peters"
    ],
    "categories": [
      "physics.class-ph",
      "physics.geo-ph"
    ],
    "title": "The Study of Complex Mechanical Oscillators using an Inexpensive   Computer Acquisition and Processing System",
    "url": "https://arxiv.org/abs/physics/0202023"
  },
  "schema_id": "dorsal/arxiv",
  "source": {
    "execution_id": "2e9aa1d5-74f6-475e-be14-4d5759962792",
    "id": "arXiv Dataset IDs",
    "type": "Model",
    "variant": "snapshot-2026-03-01",
    "version": "0.1.0"
  },
  "user_id": 1000002
}