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Educational Kits

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7W MONO AUDIO AMPLIFIER
K4001
This small amplifier is constructed around the TDA2003 IC, capable of delivering 4Wrms at 4ohms. The IC is completely thermally and short-circuit protected. A conventional direct current can be connected as supply.
Specifications
 music power output: 7W / 4ohm
 RMS output: 3.5W / 4ohm or 2W / 8ohm
 total harmonic distortion: 0.05% (1W / 1kHz)
 frequency response: 20Hz to 20kHz (-3dB)
 signal/noise ratio: 86dB (A weighted)
 input sensitivity: 40mV / 150Kohm
 overload and short-circuit protected
 supply voltage: 15V DC (8 to 18V DC possible) / 0.5A
 dimensions: 2.2 x 1.4"
YDI Price $13.90
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2 X 30W AUDIO POWER AMPLIFIER
K4003
This small amplifier is constructed with the TDA2616 IC, with a maximum supply capability of 2 x 15Wrms (4ohm) of 2 x 10Wrms (8ohm). The IC is thermally and short-circuit protected. Additional rectifier and smoothing filter are unnecessary, as alternating current can be directly connected to the unit.
Features
 exists also in mounted version: vm113
Specifications
 music power output: 2 x 30W / 4ohm
 RMS output: 2 x 15Wrms / 4ohm or 2 x 10Wrms / 8ohm
 total harmonic distortion: 0.07% (1W / 1kHz)
 channel separation: 70dB
 frequency response: 7Hz to 60kHz (-3dB)
 signal-to-noise ratio: 98dB (A weighted)
 input sensitivity: 300mV / 150Kohm
 transient suppression on/off switch
 overload and short-circuit protection: max. 1h
 supply voltage: 2 x 12V AC / 2A (50W transfo recommended)
 dimensions: 2.8 x 2"
YDI Price $24.90
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GUITAR HEADPHONE AND PREAMPLIFIER
K4102
An electric guitar cannot be connected to just any amplifier or audio installation. This pre-amplifier has been designed for this purpose and provides you with a headphone output, allowing you to practice without disturbing others. Moreover, it is fitted with a special device for tone adjustment, allowing anyone to create their personal sound.
Specifications
 sound adjustment
 adjustable input sensitivity
 low noise
 headphones output: max. 2 x 50mW / 32ohm
 housing included
 power supply: 9V battery (not incl.)
 dimensions: 2.8 x 1.2 x 4.1"
YDI Price $34.90
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PINK NOISE GENERATOR
K4301
To analyze the acoustic properties of a room (usually a living room), a good pink noise generator together with a spectrum analyzer is indispensable. Moreover, a microphone with as linear a frequency characteristic as possible (from 20Hz to 20kHz) is needed. If you have an equalizer available, then the response can not only be checked but also corrected. Easily adapted to produce "white noise"
Specifications
 pseudo random digital noise
 regulator sliding length: 33 bit
 clock frequency: adjustable between 30 and 100kHz
 pink noise filter: 3dB / octave (20Hz to 20kHz)
 output voltage: 150mVrms
 output impedance: 1Kohm
 power supply: 9 - 12V AC or 12 - 15V DC / 5mA
 PCB dimensions: 2.8" x 1.7"
YDI Price $19.90
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STEREO VU-METER 2 x 10 LEDS
K4305
Stereo VU meter with 2 x 10 LEDs (dot or bar indicator) and an adjustable input. Included in package : 1 front panel suitable for horizontal or vertical mounting.
Specifications
 range: -20dB to +3dB
 power supply: 10 - 15V DC / 250mA
 input sensitivity:
 low input: 150mV to 6Vrms (47K)
 high input: 1.5V to 60Vrms (470K)
 dimensions: 1.5" x 2.7" (x2)
YDI Price $39.90
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PRECISION STEREO VU-METER 2 X 15 LEDS
K4306
Stereo VU meter with 2 x 15 LEDs (dot or bar indicator) and an adjustable input. Included in package : 1 front panel suitable for horizontal or vertical mounting.
Specifications
 scale from: -23dB to +5dB (linear scale between -4 and +5dB)
 precision: ± 0.5dB (1kHz)
 input impedance:
 low input: 150mV - 5Vrms
 high input: 1.5V - 50Vrms
 frequency range: 20Hz - 30kHz (-3dB)
 power supply: 12 - 15V DC / 300mA
 dimensions: 5.9" x 2.2"
YDI Price $64.90
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SOUND GENERATOR
K4401
The ideal device for DJ's, jingles for radio stations or just to attract attention. With one output for direct connection to a speaker and one line output for connecting to a mixer panel or amplifier. The following effects may be generated directly by means of a push button : Machine gun · European siren · Phasor gun · Racing car with motor howl · Screeching of car tires on a curve · Explosion · Mortar fire followed by explosion · Music : "Wild charge tune" or "Snake charmers tune" · US siren
Specifications
 supply voltage: 8 - 10V DC / 100mA or 9V battery (not incl.)
 line output: 1Vrms
 speaker output: 1W
 PCB dimensions: 3.0" x 3.0"
YDI Price $29.90
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Many other Brands Of Kits Are Available!
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Prices current 8/8/09. Prices are subject to change without notice. The kits shown above are typically stocked by "You-do-it" Electronics Center. We try to maintain a current listing of current models. Occasionally products which are out of production may be listed on our website. Please E-mail Sales@youdoitelectronics.com or Call for current availability. Prices are subject to change without notice. All orders are subject to acceptance by this company & our Vendor in accordance with its standard acknowledgement form. All prices are subject to all applicable State and/or Local sales taxes. Terms are MasterCard, Visa, Discover, or American Express or Check with order, unless other arrangements are made with our credit department.
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