Circuit Diagram

3x3x3 LED Cube Circuit

Published:2013/3/4 21:21:00 Author:Ecco | Keyword: 3x3x3, LED Cube

This circuit drives a 3x3x3 cube consisting of 27 white LEDs. The 4020 IC is a 14 stage binary counter and we have used 9 outputs. Each output drives 3 white LEDs in series and we have omitted a dropper resistor as the chip can only deliver a maximum of 15mA per output. The 4020 produces 512 different patterns before the sequence repeats and you have to build the project to see the effects it produces on the 3D cube.   (View)

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2nd Order Opamp Filters

Published:2013/3/4 20:59:00 Author:Ecco | Keyword: 2nd Order , Opamp , Filters

The figures below illustrate using opamps as active 2nd order filters. Three 2nd order filters are shown, low pass, high pass, and bandpass. Each of these filters will attenuate frequencies outside their passband at a rate of 12dB per octave or 1/4 the voltage amplitude for each octave of frequency increase or decrease outside the passband. First order low or high pass cutoff frequency (-3dB point) = 1/(2pi*R*C) 2nd order low or high pass cutoff frequency (-3dB point) = 1/2pi(R1*R2*C1*C2)^.5 Example for 200 Hz cutoff frequency - R1=R2=7.95K, C1=C2=0.1uF   (View)

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Single- junction transistor divider ratio measuring circuit

Published:2013/3/4 3:08:00 Author:Ecco | Keyword: Single- junction transistor, divider ratio , measuring

Single- junction transistor divider ratio measuring circuit is shown as figure.   (View)

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Reverse breakdown voltage test circuit

Published:2013/3/4 3:10:00 Author:Ecco | Keyword: Reverse , breakdown voltage, test circuit

Reverse breakdown voltage test circuit is shown as figure.   (View)

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Oxygen circuit

Published:2013/3/4 3:11:00 Author:Ecco | Keyword: Oxygen

Oxygen circuit is shown as figure.   (View)

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The unijunction transistor speed measuring circuit 1

Published:2013/3/4 3:09:00 Author:Ecco | Keyword: unijunction transistor , speed measuring

The unijunction transistor speed measuring circuit 1 is shown as figure.   (View)

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LED- serial LED digital tube static display circuit (common anode )

Published:2013/3/1 2:43:00 Author:Ecco | Keyword: LED, serial , LED digital tube, static display, common anode

LED- serial LED digital tube static display circuit (common anode ) is shown as figure.   (View)

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LED - serial LED digital tube static display circuit ( common cathode )

Published:2013/3/1 2:42:00 Author:Ecco | Keyword: LED , serial, LED digital tube , static display , common cathode

LED - serial LED digital tube static display circuit ( common cathode ) is shown as figure.   (View)

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Basic optocoupler circuit

Published:2013/3/1 2:39:00 Author:Ecco | Keyword: optocoupler

Basic optocoupler circuit is shown as figure.   (View)

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The temperature compensation circuit of high-precision integrated pressure signal conditioner MAX1457

Published:2013/3/1 2:38:00 Author:Ecco | Keyword: temperature compensation , high-precision , integrated pressure, signal conditioner

The temperature compensation circuit of high-precision integrated pressure signal conditioner MAX1457is shown as figure.   (View)

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Precision op amp zero circuit

Published:2013/3/1 2:33:00 Author:Ecco | Keyword: Precision, op amp, zero circuit

Precision op amp zero circuit is shown as figure.   (View)

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Leakage indicator circuit

Published:2013/2/28 1:20:00 Author:Ecco | Keyword: Leakage indicator

Leakage indicator circuit is shown as figure.   (View)

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The logic test circuit

Published:2013/2/28 1:18:00 Author:Ecco | Keyword: logic test

The logic test circuit is shown as figure.   (View)

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Speaker voice coil detection circuit

Published:2013/2/28 1:16:00 Author:Ecco | Keyword: Speaker, voice coil , detection circuit

Speaker voice coil detection circuit is shown as figure.   (View)

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The quartz crystal oscillator test circuit diagram

Published:2013/2/28 1:15:00 Author:Ecco | Keyword: Quartz crystal oscillator, test circuit

The quartz crystal oscillator test circuit diagram is shown as figure.   (View)

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Local coil short-circuit test circuit

Published:2013/2/28 1:12:00 Author:Ecco | Keyword: Local , coil , short-circuit, test circuit

Local coil short-circuit test circuit is shown as figure.   (View)

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Headlight Alarm

Published:2013/2/27 20:59:00 Author:muriel | Keyword: Headlight Alarm

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Glowplug Panel (b)

Published:2013/2/27 20:58:00 Author:muriel | Keyword: Glowplug Panel (b)

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Glowplug Driver (a)

Published:2013/2/27 20:57:00 Author:muriel | Keyword: Glowplug Driver (a)

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Gel Cell Charger, II

Published:2013/2/27 20:57:00 Author:muriel | Keyword: Gel Cell Charger, II

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