KELVIN® Electronics Kits

KELVIN® Electronics Kits

  • 20-Watt Amplifier Kit

    20-Watt Amplifier Kit

    This kit contains all the parts necessary to build a 20W Mono Hi-Fi Amplifier using a LM1875 to amplify any small signal and to drive an 8 ohm speaker with 1% THD. Requires a 12-30 Volt DC power supply.

    $19.95
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  • Audio Level Meter Assembled Demo

    Audio Level Meter Assembled Demo

    Uses an LM3915 Bar Graph IC and audio pre-amplifier stage to measure an audio level. The Meter includes a sensitivity adjuster to increase and decrease the mic's sensitivity level. Requires a 9V battery. Teacher Demo Unit, Assembled/Tested.

    $59.95
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  • Audio Level Meter Bulk Pack

    Audio Level Meter Bulk Pack

    Bulk Pack of 10 Kits As Low As $12.00 Per Kit Uses an LM3915 Bar Graph IC and audio pre-amplifier stage to measure an audio level. The Meter includes a sensitivity adjuster to increase and decrease the mic's sensitivity level...

    $120.00
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  • Audio Level Meter Kit

    Audio Level Meter Kit

    The louder the sound, the more the LEDs will light. This kit uses the LM3915 Bar Graph IC and an audio pre-amplifier stage to measure an audio level. It has a sensitivity adjustment to increase or decrease the microphone sensitivity level. Requires 9VDC...

    $13.95
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  • Blinking LEDs Kit

    Blinking LEDs Kit

    When you want the attention you deserve, put this kit on your shirt, but you have to assemble and test it! This kit demonstrates how to blink 2 LEDs with common electronic components, i.e. transistors, capacitors, resistors. Requires 9VDC battery.

    $3.95
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  • Continuity Tester with LED Light Bulk Pack

    Bulk Pack of 20 Kits As Low As $2.95 Per Kit This is a real test instrument! Don't be fooled by the low price. KELVIN® is making this kit affordable for all. When troubleshooting a circuit, this kit would be a great tool...

    $88.50
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  • Decision Maker Kit

    Decision Maker Kit

    When you have to make a decision of "YES" or "NO" , "Heads or Tails", make your life simple and get the KELVIN® Electronic Decision Maker. Requires 9VDC battery. Kit.

    $3.95
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  • Function Generator Kit

    Function Generator Kit

    This function generator kit is a piece of test equipment for an electronic technician or hobbyist. Produces sine, triangle and square waveforms with frequency range between 100Hz to 100KHz. Also has an amplitude adjustment. Requires a 9V battery.

    $18.95
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  • KELVIN® "Simon Says" Brain Game Kit

    KELVIN® "Simon Says" Brain Game Kit

    Just 4 LEDs and 4 push buttons provide hours of fun. The aim-of-the-game is to repeat a pattern, which is generated at random. Low power consumption. Micro-processor controlled. Auto power off. Requires [4] AA batteries. Kit.   Also check out...

    $14.95
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  • KELVIN® 2-Way Intercom Assembled Demo

    KELVIN® 2-Way Intercom Assembled Demo

    This high quality intercom has good to excellent sound quality and is easily one of the finest systems in the educational field. Includes a pair of intercoms, project boxes, one pair of wires and batteries. Teacher Demo Unit, Assembled/Tested.

    $69.95
    Add to Cart
  • KELVIN® 20 Watt Audio Amplifier Bulk Pack

    KELVIN® 20 Watt Audio Amplifier Bulk Pack

    Bulk Pack of 10 Kits As Low As $16.00 Per Kit All the parts necessary to build a 20W Mono Hi-Fi Amplifier using a LM1875. Amplify any small signal and drive an 8 ohm speaker with 1% THD. Requires a 12-30 V DC power supply...

    $160.00
    Add to Cart
  • KELVIN® 20+20 W Stereo Audio Amplifier

    KELVIN® 20+20 W Stereo Audio Amplifier

    A high quality stereo audio amplifier which operates from a 12-30 Volt DC power supply. This kit contains all the parts necessary to build a 20+20 Watt stereo Hi-Fi Amplifier using a LM1875 to amplify any small signal and to drive an 8 ohm speaker with 1...

    $21.95
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  • KELVIN® 3D Christmas Tree Kit

    KELVIN® 3D Christmas Tree Kit

    This kit features 32 LEDs that can either blink in pattern or light up the whole board with the use of two switches. Easy assembly by sliding the two boards together onto the bottom board (where major components are soldered). Requires 9V...

    $15.95
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