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  2. List of Arduino boards and compatible systems - Wikipedia

    en.wikipedia.org/wiki/List_of_Arduino_boards_and...

    Arduino layout-compatible board, designed for use with a USB-TTL serial cable. DuinoBot v1.x [89] ATmega32U4 RobotGroup Argentina [90] Arduino fully compatible board, with integrated power supply and controllers designed for robotics. Compatible as well with the system "Multiplo" eJackino [91] Kit by CQ publisher in Japan.

  3. Security alarm - Wikipedia

    en.wikipedia.org/wiki/Security_alarm

    Reed Switch. The hermetically sealed reed switch is a common type of two-piece sensor. This switch operates with an electrically conductive switch that is either normally open or normally closed when under the influence of a magnetic field in respect to proximity to the second piece, which contains a magnet. When the magnet moves away from the ...

  4. Charlieplexing - Wikipedia

    en.wikipedia.org/wiki/Charlieplexing

    A Charlieplexed digital clock which controls 90 LEDs with 10 pins of a PIC 16C54 microcontroller.. Charlieplexing (also known as tristate multiplexing, reduced pin-count LED multiplexing, complementary LED drive and crossplexing) is a technique for accessing a large number of LEDs, switches, micro-capacitors or other I/O entities, using relatively few tri-state logic wires from a microcontroller.

  5. File:Flame ionization detector schematic-en.svg - Wikipedia

    en.wikipedia.org/wiki/File:Flame_ionization...

    The following other wikis use this file: Usage on ar.wikipedia.org مكشاف تأين اللهب; Usage on bn.wikipedia.org ফ্লেম আয়নাইজেশন ডিটেক্টর (এফআইডি)

  6. Arduino - Wikipedia

    en.wikipedia.org/wiki/Arduino

    Arduino (/ ɑː r ˈ d w iː n oʊ /) is an Italian open-source hardware and software company, project, and user community that designs and manufactures single-board microcontrollers and microcontroller kits for building digital devices.

  7. Reed switch - Wikipedia

    en.wikipedia.org/wiki/Reed_switch

    The reed switch [i] is an electromechanical switch operated by an applied magnetic field. It was invented in 1922 by professor Valentin Kovalenkov at the Petrograd Electrotechnical University , [ 1 ] and later evolved at Bell Telephone Laboratories in 1936 by Walter B. Ellwood into the reed relay.

  8. Photoresistor - Wikipedia

    en.wikipedia.org/wiki/Photoresistor

    A photoresistor can be used in light-sensitive detector circuits and light-activated and dark-activated switching circuits acting as a semiconductor resistance. In the dark, a photoresistor can have a resistance as high as several megaohms (MΩ), while in the light, it can have a resistance as low as a few hundred ohms.

  9. 2N3906 - Wikipedia

    en.wikipedia.org/wiki/2N3906

    2N3906 transistors in plastic TO-92 packaging. The cases are marked with E, B, and C for lead identification. Photomicrograph of the transistor chip inside a 2N3906 transistor package, showing the conductive metal layers used to connect the semiconductor junctions to the package leads.