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  2. Output signal switching device - Wikipedia

    en.wikipedia.org/wiki/Output_Signal_Switching_Device

    External Device Monitor (EDM). The device issuing the OSSD signals may have an EDM input. The EDM is used to verify that the controlled device (safety relay) did indeed open when the OSSD signals were dropped. The safety relay has normally closed contacts, which close when the relay is de-energized, thereby turning on the EDM input.

  3. List of free and open-source iOS applications - Wikipedia

    en.wikipedia.org/wiki/List_of_free_and_open...

    This is an incomplete list of notable applications (apps) that run on iOS where source code is available under a free software/open-source software license.Note however that much of this software is dual-licensed for non-free distribution via the iOS app store; for example, GPL licenses are not compatible with the app store.

  4. Novation Digital Music Systems - Wikipedia

    en.wikipedia.org/wiki/Novation_Digital_Music_Systems

    It was based on a device called the MidiCon, which was never released and was the first hardware controller the company made. The MM10 combined with the QY10 arguably constituted the first completely portable modern music workstation. [1] In 1993 the company released the Novation Bass Station.

  5. List of built-in iOS apps - Wikipedia

    en.wikipedia.org/wiki/List_of_built-in_iOS_apps

    Apple Inc. develops many apps for iOS that come bundled by default or installed through system updates. Several of the default apps found on iOS have counterparts on Apple's other operating systems such as macOS, iPadOS, watchOS, and tvOS, which are often modified versions of or similar to the iOS application.

  6. Portable People Meter - Wikipedia

    en.wikipedia.org/wiki/Portable_People_Meter

    There are several parts to the PPM system: An encoder that inserts the tones subliminally into a station's or broadcast network's airchain via psychoacoustic masking. A monitor that checks that the encoder is working properly. The wearable Portable People Meter carried by each panelist.

  7. PreSonus - Wikipedia

    en.wikipedia.org/wiki/PreSonus

    PreSonus was founded in 1995, in Baton Rouge, Louisiana by Louisiana State University electrical engineering graduates Jim Odom (also a member of the rock band LeRoux) and Brian Smith, to solve technical issues with engineering music CDs.

  8. Power management integrated circuit - Wikipedia

    en.wikipedia.org/wiki/Power_management...

    Power management ICs are solid-state devices that control the flow and direction of electrical power. Many electrical devices use multiple internal voltages (e.g., 5 V, 3.3 V, 1.8 V, etc.) and sources of external power (e.g., wall outlet, battery, etc.), meaning that the power design of the device has multiple requirements for operation. A PMIC ...

  9. MFi Program - Wikipedia

    en.wikipedia.org/wiki/MFi_Program

    Apple Inc.'s MFi Program, referring to "Made for iPhone/iPod/iPad", is a licensing program for developers of hardware and software peripherals that work with Apple's iPod, iPad and iPhone. The name is a shortened version of the long-form Made for iPod , the original program that ultimately became MFi.