VU 220V Circuit

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For those who like the sound and light system. Today I get to see the VU lamp 220V circuit.
We may see a small LED in the circuit, but we put a sign of coming out with VU and Opto MOC3021M Triac combined to drive the lamp to light.
This circuit is used OptoCoupler Number MOC3021M NL =11 Pcs.
Triac uses a number BT139-600E 11 + signature print and a electronic device.
The stability and make the budget more than $ 15.

For all electronic device list ,you can look at the number on the PCB and part assembly.

you can bring signal from UV IC or LED signal to connect with Opto

Thus as below show device assembly layout.

VU 220 Lamp Device Lay Out

Light activated circuit

Today,We have two simple circuit is a transistor switch to the base of the transistor with a voltage divider. The voltage divider consists of two resistors. The first is the 100K Potentiometer 1K plus protective layer resistance. Secondly, the resistance of LDR. This is the schematic representation of the circuit:

When the light changes on the surface of the LDR, LDR is the resistance. The more light, the lower the resistance of the LDR, the less friction, the lower the voltage over it. The less light, the greater the resistance and thus the greater the voltage across it.

Part List

D1 = 1N914
Q1=2N2222 OR similar NPN transistor
R1 =Photoresistor
R2=50K Variable Resistor
R3=1K
Relay = 5 to 6 volt relay.

When the voltage increases, the SD of the 2N2222 transistor and thus the ICE increases accordingly, until the current is sufficient to activate the relay.

The amount of light that can be changed to activate the relay by a change in the 100k potentiometer. In short, any change in the potentiometer to the voltage loss of the LDR effects because they are both members of the voltage divider are described above.

The 1N4001 diode is used to eliminate stress again, if the relay is turned off. It is very important to the diode, as can be damaged without the transistor.
Before serving work as far as the activation. It will not detect a problem, dark or light or operate the relay, but it will be a problem if the relays are released. At this point, the circuit has a large hysteresis. Therefore, we must continue to strengthen the signal before we apply to the switching transistor.

We will BC517 NPN Darlington transistor pair. Should we 2N2222 between him and the LDR, as the following circuit shows:   

Dark activated circuit

This addition increases the sensitivity of the circuit. The hysteresis window is decreased significantly, but there is still an area known as the relay is activated, it will not be rotated by the same amount of light that existed just prior to activation.
Only an adjustment and that would (of course) potentiometer. Your goal is to operate the circuit when the relay is equal to or less light to the predefined value. The easiest way to do this is as follows:

Let the LDR by the amount of light illuminates you. Hold the potentiometer in the highest value. Then start slowly turning the potentiometer and reduce drag. If you “click” of the relay listen to find your reference. From that moment every time the light is less than or equal to (or more if the circuit is turned on the light “as configured) is to light that you have created this preference is enabled the relay.

Audio light modulator circuit

The Audio light modulator Circuit for add organized the joy of music at functions at home or outdoors.
This article here is a simple circuit where the light is a small fraction of the audio output at the speaker terminals of the modulated audio amplifier.
The output of the speaker terminals of audio amplifier (used transformers in transistor radios) with a transformer connected through a non-polarized capacitor.
  The use of the transformer is important to isolate the source of the audio circuitry in the sensitivity of VR1 potentiometer input to the T1 set to ensure that the guide is not until the AF will pay above certain.

Power Flasher Circuit

There is no reason to resort to complex circuitry if what you are looking for is a simple flash power. The light flashes around 1Hz with a 100Watt bulb with a duty cycle of 50%. Maximum load that can be driven with this circuit is 200Watt, and if you want to have another frequency you must change the value of the capacitor. To 110VAC operation was not tested, though I expect the work, provided that the heaters are set at about half the amount indicated. SCR BSTC1026 is manufactured by Siemens, but other semiconductor equivalent sensitivity with standard port, should work fine.

WARNING! -

     This circuit is directly connected to the mains and precautions must be taken. A more modern design would use a sensitive gate SCR, other low-power resistors, further resistance between gate and cathode, and a 10mF, 250V electrolytic capacitor

Xenon strobe circuit A

Circuit source voltage high-light Xenon Strobe with this circuit using the power source DC Size 3V-6V with IC LM555 acts produce frequencies and cycles in nature PWM and then through the MOSFET driver transformers, high voltage can be 220V, then left through a series circuit Flash. The left driving lamp reflector.

Xenon strobe circuit B

Christmas Star circuit

This circuit can be used to construct an attractive poinsettia. If we want to change gradually over this distance, the brightness of the lamp L1. When it reaches full brightness, the brightness begins to decrease gradually.

Christmas Star Lights

And when he reached the minimum brightness, it automatically increases. This cycle repeats itself. The increase or decrease the brightness of lamp L1 depends on the charging and discharging of the capacitor C3. When the output of IC1 is high, capacitor C3 begins to download and then the brightness of lamp L1.

 IC2 is an optocoupler while IC1 is configured as an astable multivibrator. The frequency of IC1 by varying the resistance R2, or the value of the capacitor C1 to be changed. Remember that if you change the frequency of IC1, you should also change the values of resistors R3 and R4 according to the best performance. The minimum brightness of the light L1 can be changed by the potentiometer VR1.

When the brightness of the lamp L1 does not reach a reasonable brightness, or if the lamp appears to remain at the level of maximum brightness (alarm for a minute), increased resistance of the potentiometer VR1 in-circuit. If the resistance in the circuit of the potentiometer VR1 is too high, the light flickering in the region of minimum brightness, or the lamp can be turned off to the state for a long period of time. In such cases, reduce the resistance of the potentiometer VR1 until the brightness of the lamp L1 smoothly increases and decreases. varies as the supply voltage, VR1 is required as mentioned above, for the proper performance of the circuit. As a triac BT136 can be used in place of the SCR in this circuit. Note: when setting the potentiometer VR1 should be taken to prevent electric shock

350W light control circuit

This is the kind of common drive widely available in hardware stores and home improvement stores. The circuit is a basic model for light dimmer for 120V AC voltages. The basic design of the bulbs can power range from 30W to enter the order of a few hundred watts (depending on model).

The objective of the pot P1 and C2 in a diac / triac combination is just to delay the ignition point of the DIAC crossing zero. The greater the resistance (R2 + P1) feeding the capacitor C2, the longer it takes the voltage across the capacitor at the point where increasing the diac D1 fires turning on the triac TH1. Capacitor C1 and inductor L1 a simple filter Radio Frequency Interference. Without it, the circuit to produce, because a lot of problems, firing of the triac in the middle of AC phase causes fast rising current surges. The triac TH1 can resist 6A DC current when cooled properly, so that the circuit would be able to handle about 300-500W of power when a small heat sink is mounted TH1. If TH1 is not cooled, the maximum is probably around 150W.

Component

R1  50K Pot 
R2  15K 1/2W Resistor 
C1, C2   0.068 250V Capacitor 
L1   Lamp To Be Controlled (up to 350 watts) 
L2   Neon Lamp 
TR1  40502   TRIAC

Road Light control circuit

This is basically a Schmitt Trigger circuit which receives input from a cadmium sulfide photo cell and controls a relay that can be used to switch off and on a street lamp at dawn and dusk. I have built the circuit with a 120 ohm/12 volt relay and monitored performance using a lamp dimmer, but did not connect the relay to an outside light. The photo cell should be shielded from the lamp to prevent feedback and is usually mounted above the light on top of a reflector and pointed upward at the sky so the lamp light does not strike the photo cell and switch off the lamp. The photo cell is wired in series with a potentiometer so the voltage at the junction (and base of transistor) can be adjusted to about half the supply, at the desired ambient light level. The two PNP transistors are connected with a common emitter resistor for positive feedback so as one transistor turns on, the other will turn off, and visa versa. Under dark conditions, the photo cell resistance will be higher than the potentiometer producing a voltage at Q1 that is higher than the base voltage at Q2 which causes Q2 to conduct and activate the relay. The switching points are about 8 volts and 4 volts using the resistor values shown but could be brought closer together by using a lower value for the 7.5K resistor. 3.3K would move the levels to about 3.5 and 5.5 for a range of 2 volts instead of 4 so the relay turns on and off closer to the same ambient light level. The potentiometer would need to be readjusted so that the voltage is around 4.5 at the desired ambient condition.

Circuit was designed to create a detection system with reference to the source of light energy.

Terminology

* Photo detector – a device that senses and detects the light and radiant energy,

BP103 Phototransistor Siemens

which uses the principle of photoconductivity, where the material with the characteristic changes of their electrical conductivity when exposed to light
* CA3130E – BiMOS operational amplifier that combines the advantages of two bipolar transistors and CMOS, which can be used in sensor photodiode amplifier peak detector, single-supply rectifier full-wave voltage regulators and precision supporters comparators high input impedance amplifier and broadband meters Long term, rapid sample hold amplifier, amplifiers, refers only reason Offers
* 74HCT13 – High Speed Silicon gate CMOS device that is pin compatible with low power Schottky TTL, includes four 2-input gates which accept standard input signals and are capable of transforming slowly changing input signals into sharply defined vibration output signals, without
* BP103 – Silicon NPN phototransistor circuits used to control and training, industrial electronics, forks, and controlled by a computer flashes with its features such as high linearity, suitable for applications from 420N to 1130nm and packaged into the motherboard 18-lens transparent epoxy resin in combination with Database

Circuit Description

photo detector circuit with 74HCT13

During the operation, the circuit is producing low power, which is enough light detector receives light. Even in the darkness, the light source can also be made from a variety of ways. Compatibility between the output of a TTL level logic produces a low level. This occurs because the light is detected by phototransistor Q1 BP103. This model of the transistor is manufactured by Siemens. Phototransistor has a photodiode with internal gain and nothing more than a bipolar transistor in a transparent case so that the base-collector junction can be achieved by light. Photons base-collector junction produce electrons can be injected into the base. The current gain transistor amplifies the photodiode current.

Assembled PCB Exemple

The sensitivity of the circuit is regulated by 10K ohm adjustable resistor RV1. Circuit is 5 V power supply that can be drawn from batteries or external power source.

Xenon Strobe CIRCUIT 1

The circuit used to come in kit form with a surplus supplier, but it is probably more available. It shows some new concepts such as using a 555 as a pulse width modulator (PWM), and serial / parallel processors flash camera.
The 555 is mounted as a pulse width modulator (from the (low) time to be determined by the regulator). The output on pin 3 is connected to the gate of P-channel MOSFET (IRF9Z20) through the 100R resistor to prevent parasitic oscillation of the transistor. A low signal on pin 3 causes the MOSFET to turn, so the button controls the flash output and a bit rate, by varying the duty cycle of 555 and in turn the MOSFET.

Xenon Strobe CIRCUIT 2

light adjustable circuit with IC 4017

The IC-556 works as a pulse generator and feeds the clock pulses to IC 4017th IC 4017 is the heart of this circuit.

 It works like a switch and gives the output after every 10 pulses. It pushes the transistor, which in turn fire the triacs. The triac provides sufficient current to the load.