Active filters

  • NE555 Timer (DIP 8) (Pack...


    These devices are precision timing circuits capable of producing accurate time delays or oscillation. In the time-delay or monostable mode of operation, the timed interval is controlled by a single external resistor and capacitor network.

    Datasheet is available on our support forum here.

    Please note that the manufacturer of this chip is subject to change.

    In Stock
  • 0.3 Inch DIL IC Socket 28...


    Number of Pins: 28

    Socket Type: DIL 0.3 Inch

    In Stock
  • USB to RS232 TTL Serial...


    USB to RS232 TTL PL2303HX auto converter module adapter with a 5V output, which provides the most convenient way to connect your RS232 TTL devices to your computer via the USB port. The cable has a built-in TTL COM PC-PL2303HX Chip and uses a standard USB type A male and TTL 4 pin connector. The cable length is approximately 100cm in length.

  • Crystal Kit (15)



    Kit contains one of each of the following values

    4.000 MHz

    12.288 MHz

    6.000 MHz

    16.000 MHz

    In Stock
  • ULN2803 8-Channel...


    The ULN2803APG / AFWG Series are high−voltage, high−current darlington drivers comprised of eight NPN darlington pairs. All units feature integral clamp diodes for switching inductive loads. Applications include relay, hammer, lamp and display (LED) drivers.

    Datasheet is available on our support forum here.

    Please note that the manufacturer of this chip is subject to change.

    In Stock
  • 125KHz RFID (ID) Keyfob


    These 125KHz RFID key fobs are idea for use as general purpose RFID tags or for use with with our RFID door access system (HCRFID0002). Each fob has a unique serial number therefore no programming is required to use them. The fob is constructed from hard wearing ABS plastic. This is a pack of 5.

    In Stock
  • Passive 16ohm PCB...


    A 12mm diameter miniature PCB mounted passive speaker ideal for projects where a multi toned sound is required.

    Min voltage: 1.5V
    Max voltage: 5V
    Coil resistance: 16 Ohms
    Diameter: 12mm
    Height above PCB: 8.4mm

    In Stock
  • uA741x General-Purpose...


    The µA741 device is a general-purpose operational amplifier featuring offset-voltage null capability.

    The high common-mode input voltage range and the absence of latch-up make the amplifier ideal for voltage-follower applications. The device is short-circuit compensation components. A low value potentiometer may be connected between the offset null inputs to null out the offset voltage.

    In Stock
  • Pulse / PWM generator for...


    This pulse generator module is intended to be interfaced with common types of stepper / motor controllers. The module has two modes of operation, frequency and PWM. In frequency mode it will generate a square wave signal at a frequency that can b...

  • Blue diffused / frosted 3mm...


    Standard high quality 3mm LED (HCOPTO0047) in a white diffused / frosted package. Suitable for power and status indicators, back-lighting, message displays, 3D cubes, etc. Sold in packs of 100.


    Model number: HCOPTO0047
    Forward Voltage: 3.0 to 3.2V
    Wavelength: 457-460 nm
    Intensity: 2000-3000 mcd
    LED Diameter: 3 mm
    Pin pitch: 2.54mm / 0.1" Pitch

    In Stock
  • RFID (ID) Access Control...


    The Hobby Components RFID (ID) panel is a complete working door access security system that allows secure door entry using readily available RFID tags or cards for up to 500 different users. The panel can be programmed from the integrated keypad using a master code. This allows adding and deleting cards & pin numbers and changing various settin...