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LED Holiday lights controller circuit diagram 6

Published:2011/3/30 20:37:00 Author:Ecco | Keyword: LED Holiday lights, controller

The LED holiday lights controller introduced in the example can display four sentences four words composing of many LEDs(such as celebrating May Day and long live our motherland ), and they display in time sequence to add festive atmosphere to festive night. Circuit principle of work This LED holiday lights controller circuit is composed of power supply circuit, pulse generator and control circuit and LED display circuit component, as shown in figure. Power circuit is composed of voltage step-down capacitor Cl, bleeder resistors Rl, rectifier diode VDl, VD2, voltage-regulator diode VS and filter capacitor C2. Pulse generator is composed of time-based integrated circuit ICl, resistor R2, R3 and capacitor C3, C4. Control circuit is composed of decimal count/pulse splitter integrated circuit IC2, diodes VD3, resistors R4 - R8 and capacitor C5 and thyristor VTl-VW. (View)

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Micro active amplifier circuit diagram

Published:2011/3/30 2:32:00 Author:Rebekka | Keyword: Micro active amplifier

Here is the schematic diagram of the micro active amplifier circuit: (View)

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The balanced input amplifier circuit diagram of 600Ω microphone

Published:2011/3/29 20:10:00 Author:Ecco | Keyword: balanced input, amplifier, 600Ω microphone

The balanced input amplifier circuit diagram of 600Ω microphone is as the chart. (View)

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Ratio of the unknowns circuit diagram

Published:2011/3/29 20:11:00 Author:Ecco | Keyword: Ratio of the unknowns

Ratio of the unknowns circuit diagram
This circuit is used as the situation of two signals share the same input line, for example, two leds irradiate a single photocell alternately. To measure the ratio of two unknowns, the precision better than 1%. During the period of T1, the input signal is sampled by S2, and storaged in C2, so that to make a comparison with reference voltage, the result of which can be obtained by the amplifier network AFE, added to gain control elements CLM6000. The adjusting signal gain of closed loop is increased, and the denominator of ratio is equal to reference voltage. And the molecular corresponding to T2 multiplied by the same gain, so the output of molecular direct ratio to the needed unknow value B/A . (View)

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Transmitter circuit diagram

Published:2011/3/29 20:51:00 Author:Rebekka | Keyword: Transmitter

Transmitter circuit diagram
Here is the schematic diagram of the transmitter circuit: (View)

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The white LED drive circuit diagram composed of MAX1554

Published:2011/3/29 20:07:00 Author:Ecco | Keyword: white LED drive

The white LED drive circuit diagram composed of MAX1554
According to the figure, it is a circuit diagram of white LED drive composed by the MAX1554. It is the white LED drive circuit whichis supplied by 2 to 4 section batteries, the brightness's maximum will keep constant. The Rl is a current examination resistance, its resistivity is 27 Ω, therefore LED current is about 10 mA. For enlarging current, the L1 needs to adopt a saturated density of magnetic flux higher inductance. (View)

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500W push-pull DCDC converter circuit diagram

Published:2011/3/29 20:53:00 Author:Rebekka | Keyword: 500W push-pull , DCDC converter

Here is the schematic diagram of the 500W push-pull DCDC converter circuit: (View)

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USB camera circuit diagram

Published:2011/3/30 2:22:00 Author:Rebekka | Keyword: USB camera

USB camera circuit diagram
Here is the schematic diagram of the USB camera circuit: (View)

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USB to 232 serial port circuit diagram

Published:2011/3/30 2:23:00 Author:Rebekka | Keyword: usb to 232 serial port

USB to 232 serial port circuit diagram
Here is the schematic diagram of the USB to 232 serial portcircuit: (View)

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Cell phone battery constant-current charger circuit diagram

Published:2011/3/29 20:05:00 Author:Ecco | Keyword: Cell phone battery , constant-current, charger

Cell phone battery constant-current charger circuit diagram is as below: (View)

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Automatic instructions protection circuit diagram

Published:2011/3/29 20:05:00 Author:Ecco | Keyword: Automatic instructions protection

Automatic instructions protection circuit diagram
When the electric supply in the circuitry is higher than the limit set by W1, LED 2 will be lit, door 2 will be closed, output 1, J pulled in, closed contact is disconnected. That could realize the purpose of temporary protection to interruption. When the electric supply is lower than the limit, door 4 opened, LED 1 lit, the output of door 3 is 0 , J pulled in. That also could realize the purpose of temporary protection to interruption. (View)

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The circuit diagram of light signal receiving

Published:2011/3/29 20:03:00 Author:Ecco | Keyword: light signal receiving

The circuit diagram of light signal receiving
This circuitry adopts the photoelectric cell IR-B2 M type to receive semaphore. Optics semaphore can be optical light or infrared light, and it takes the LED or semiconductor laser machine as light source, and the municipally frequency should be 0.5~2.0 KHZ. When the photocell is irradiated, it can produce quadrature voltage and be amplifiered by Q1, Q2, then the voltage will pass a output transformer which mutually matches with earphone impedance. Consequently, we can use earphone to hear the sound clearly. (View)