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  2. AVR microcontrollers - Wikipedia

    en.wikipedia.org/wiki/AVR_microcontrollers

    The STK200 starter kit and development system has a DIP socket that can host an AVR chip in a 40, 20, or 8-pin package. The board has a 4 MHz clock source, 8 light-emitting diode (LED)s, 8 input buttons, an RS-232 port, a socket for a 32 KB SRAM and numerous general I/O. The chip can be programmed with a dongle connected to the parallel port.

  3. Switched-mode power supply - Wikipedia

    en.wikipedia.org/wiki/Switched-mode_power_supply

    With a switched-mode PSU the switching frequency can be chosen to keep the noise out of the circuits working frequency band (e.g., for audio systems above the range of human hearing) Electronic noise at the input terminals: Causes harmonic distortion to the input AC, but relatively little or no high-frequency noise.

  4. Korndörfer autotransformer starter - Wikipedia

    en.wikipedia.org/wiki/Korndörfer_Autotransformer...

    The phase coils are traditional wound in a single coil assembly with the 0 to 50% winding section buried below the 50% to 100% windings in a single thermal mass as shown in figures 2 and 3 Figure 4. 3 Coil Assembly. Figure 4 shows an improved 1000 kW 11,000 Volt motor starter autotransformer with Axial cooling fans, Cast resin encapsulated coils,

  5. Choke (electronics) - Wikipedia

    en.wikipedia.org/wiki/Choke_(electronics)

    In electronics, a choke is an inductor used to block higher-frequency alternating currents (AC) while passing direct current (DC) and lower-frequency ACs in a circuit. A choke usually consists of a coil of insulated wire often wound on a magnetic core , although some consist of a doughnut-shaped ferrite bead strung on a wire.

  6. List of 7400-series integrated circuits - Wikipedia

    en.wikipedia.org/wiki/List_of_7400-series...

    5-bit 4-port FET bus exchange switch 24 IDT74FST3383: 74x3384 2 dual 5-bit FET bus switch 24 IDT74FST3384: 74x3386 1 5-bit 4-port FET bus exchange switch with extended voltage range (24) SN74CBT3386: 74x3390 1 octal 2-line to 1-line FET multiplexer / bus switch (28) IDT74FST3390: 74x3573 1 octal transparent latch three-state 20 IDT74FCT3573 ...

  7. Motor–generator - Wikipedia

    en.wikipedia.org/wiki/Motor–generator

    An Alexanderson alternator is a motor-driven, high-frequency alternator which provides radio frequency power. In the early days of radio communication, the high frequency carrier wave had to be produced mechanically using an alternator with many poles driven at high speeds. Alexanderson alternators produced RF up to 600 kHz, with large units ...

  8. Op amp integrator - Wikipedia

    en.wikipedia.org/wiki/Op_amp_integrator

    Referring to the above diagram, if the op-amp is assumed to be ideal, then the voltage at the inverting (-) input is held equal to the voltage at the non-inverting (+) input as a virtual ground. The input voltage passes a current V in / R 1 {\displaystyle V_{\text{in}}/{R_{1}}} through the resistor producing a compensating current flow through ...

  9. Induction generator - Wikipedia

    en.wikipedia.org/wiki/Induction_generator

    C = 1 / (2*π*f*Xc) = 1 / (2 * 3.141 * 60 * 127) = 21 μF. If the load also absorbs reactive power, capacitor bank must be increased in size to compensate. Prime mover speed should be used to generate frequency of 60 Hz: Typically, slip should be similar to full-load value when machine is running as motor, but negative (generator operation):