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  2. Circuit diagram - Wikipedia

    en.wikipedia.org/wiki/Circuit_diagram

    A circuit diagram (or: wiring diagram, electrical diagram, elementary diagram, electronic schematic) is a graphical representation of an electrical circuit. A pictorial circuit diagram uses simple images of components, while a schematic diagram shows the components and interconnections of the circuit using standardized symbolic representations.

  3. DATAmatic 1000 - Wikipedia

    en.wikipedia.org/wiki/DATAmatic_1000

    DATAmatic 1000 computer system. The DATAmatic 1000 is an obsolete computer system from Honeywell introduced in 1957. It uses vacuum tubes and crystal diodes for logic, and featured a unique magnetic tape format for storage. [1] The CPU uses a 48-bit word (plus four check bits).

  4. Electronic symbol - Wikipedia

    en.wikipedia.org/wiki/Electronic_symbol

    Wire crossover symbols for circuit diagrams. The CAD symbol for insulated crossing wires is the same as the older, non-CAD symbol for non-insulated crossing wires. To avoid confusion, the wire "jump" (semi-circle) symbol for insulated wires in non-CAD schematics is recommended (as opposed to using the CAD-style symbol for no connection), so as to avoid confusion with the original, older style ...

  5. Thermostat - Wikipedia

    en.wikipedia.org/wiki/Thermostat

    A digital thermostat Honeywell's "The Round" model T87 thermostat, one of which is in the collection of the Smithsonian. A touch screen thermostat An electronic thermostat in a retail store A thermostat is a regulating device component which senses the temperature of a physical system and performs actions so that the system's temperature is ...

  6. Digital reference - Wikipedia

    en.wikipedia.org/wiki/Digital_reference

    The earliest digital reference services were launched in the mid-1980s, primarily by academic and medical libraries, and provided by e-mail.These early-adopter libraries launched digital reference services for two main reasons: to extend the hours that questions could be submitted to the reference desk, and to explore the potential of campus-wide networks, which at that time was a new technology.

  7. Digital Reader 1000 - Wikipedia

    en.wikipedia.org/wiki/Digital_Reader_1000

    The Digital Reader 1000 (DR1000) was an e-Book reading device produced by iRex in the Netherlands. Production ceased in 2010, when iRex filed for bankruptcy . [ 1 ] The DR1000 was produced with a 10.2-inch (25.9 cm) e-ink display.

  8. Thermometer - Wikipedia

    en.wikipedia.org/wiki/Thermometer

    The first clear diagram of a thermoscope was published in 1617 by Giuseppe Biancani (1566 – 1624); [2]: 10 the first showing a scale and thus constituting a thermometer was by Santorio Santorio in 1625. [5] This was a vertical tube, closed by a bulb of air at the top, with the lower end opening into a vessel of water.

  9. Resistance thermometer - Wikipedia

    en.wikipedia.org/wiki/Resistance_thermometer

    Larger-diameter platinum wire is used, which drives up the cost and results in a lower resistance for the probe (typically 25.5 Ω). UPRTs have a wide temperature range (−200 °C to 1000 °C) and are approximately accurate to ±0.001 °C over the temperature range. UPRTs are only appropriate for laboratory use.