This is an era that advocates energy conservation and environmental protection. Nowadays, more and more lighting fixtures can realize the effect of lights on when people come and lights off when people leave. We can often see such lamps in corridors. Of course, they can also be seen in other places, such as balcony lamps, because this kind of lighting lamps not only saves energy, reduces consumption, is easy to use, but also has safe and reliable performance. People’s life has brought many conveniences. In fact, it is not the problem of the lamp that the light turns on and off, but its switch can realize the function of controlling the light. What kind of lights are used for corridor decoration?
Nowadays, the decoration of corridors generally adopts lamps that can automatically turn on the lighting. After people leave, it can be automatically turned off after a delay, eliminating the artificial waste of energy, prolonging the service life of electrical appliances, and integrating energy saving, convenience and safety. This kind of lamp is actually an automatic switch that controls the circuit. There are many types. The way of closing the switch (that is, turning on the light) includes “voice control”, “trigger”, “induction”, “light control”, etc., The way of disconnection is basically the same, controlled by a delay circuit (automatic disconnection after working for a period of time). The lamp head can be an incandescent lamp, because after the incandescent lamp is connected to the power supply, it will reach 90% of the maximum brightness of the lamp in a few seconds; you can also choose an LED lamp, the LED lamp will turn on immediately, and the response speed is fast (about 10- 9 seconds), the total energy consumption is 2.5W, which is equivalent to the brightness of a 40W incandescent lamp.
LED sound control light circuit diagram LED sound and light control energy-saving lamp circuit diagram corridor LED sound control light
LED sound control light is a sound control electronic lighting device installed in the LED lamp. The LED sound control light is composed of microphone, audio amplifier, frequency selection circuit, It consists of a voltage doubler rectifier circuit, an amplitude discrimination circuit, a constant voltage source circuit, a delay opening circuit, a controllable delay switch circuit, and a thyristor circuit. And the LED voice-activated light has an interesting phenomenon, that is, when the light is sufficient, no matter how loud you make it, it will not turn on; but in the dark night, it emits a light with a light sound, why is this? It turns out that the LED sound-controlled light also has a light-controlled circuit, so that it does not work when the light is sufficient, so the control box of the sound-controlled light is controlled by sound and light at the same time, and the light will not turn on when the brightness can be achieved. You can do a small experiment, you can block the light control original of the voice switch with your hand and then make a sound, the light will come on.
The LED voice-activated light circuit is mainly composed of a pickup (electret capacitor microphone), a transistor amplifier and a light-emitting diode.
a. Circuit principle
When static, VT1 is in a critical saturation state, so VT2 is cut off, LED1 and LED2 are not lit, R1 is used for the capacitor microphone The MIC provides bias current, and the microphone picks up the acoustic signal in the indoor environment and converts it into a corresponding electrical signal, which is sent to the base of VT1 through capacitor C1 for amplification. VT1 and VT2 form a two-stage direct coupling amplifier circuit. Appropriate R2, R3 make no sound wave signal. VT1 is in a critical saturation state, and so that VT is in a cut-off state, no current flows through the two LEDs and does not emit light. When the MIC picks up the sound wave signal, an audio signal is injected into the base of VT1, and the negative half cycle of the signal is To make VT1 out of saturation, the collector voltage of VT1 rises. VT2 is turned on, LED1 and LED2 light up, when the input audio signal is weak, it is not enough to make VT1 exit the saturation state, LED1 and LED2 remain off, only when a strong signal is input, the photodiode will light up Therefore, LED1 and LED2 can flash and light up with the fluctuation of the signal of ambient sound (such as music, speech).
b, Component List
VT1, VT2, 9014 (BT200), Microphone, R1 4.7K, R2 1M, R3 10K, C1 1uF/ 16V, C2 100uF/10V, LED1, LED2, LED.
c, Installation and Commissioning
Draw the assembly drawing according to the schematic diagram, and then assemble according to the assembly drawing. Note that the polarity of the triode cannot be wrongly connected, and the components are arranged neatly and beautifully. After power-on, first measure the collector voltage of VT to make it between 0.2-0.4. If the voltage is too low, after applying a sound signal, VT1 cannot exit the saturation state, and VT2 cannot be turned on. If the voltage exceeds the dead zone of VT2 voltage, VT2 is turned on when static, so that LED1 and LED2 light up and emit light, so. For capacitor microphones with different sensitivities and triodes with different β values, the size of the collector resistor R3 of VT1 should be determined by debugging. The distance from the microphone is about 0.5 meters. When speaking with a normal voice (moderate volume), LED1 and LED2 should flash with the voice. When you need to speak loudly, the light-emitting tube flashes and emits light. You can appropriately reduce the resistance of R3 or replace the triode with a larger β value.
LED sound and light control energy-saving lamp
LED sound and light control energy-saving lamp integrates sound perception, light effect sensor, delay control, built-in sound sensor components, light effect sensor components, delay switch intelligent module . In the case of strong light during the day, the light effect sensing element sends the sensing signal value to the delay switch, and the delay switch is automatically locked. If there is sound vibration, the lock will not be unlocked, and the energy-saving lamp will not light up. When the light is relatively dark, the light effect sensing element sends the sensing signal value to the delay switch, and the delay switch automatically unlocks, but whether to turn on the energy-saving lamp depends on the signal given by the sound sensing element. When there is sound vibration, The sound sensing element will transmit the signal to the delay switch to notify the start of the work and the energy-saving lamp to turn on. The delay switch is factory-set with a lighting duration of 60 seconds. If there is no sound and vibration signal within this time period, the delay switch will automatically turn off, and the energy-saving lamps will automatically turn off, waiting for the next sound signal.
LED sound and light control energy-saving lamp circuit is composed of main circuit, switch circuit, detection circuit and amplifier circuit.
a. Circuit principle
Four diodes (VD1-VD4) and a one-way thyristor (VS) constitute the main bridge rectifier. circuit (connected in series with the light bulb); the switch circuit is composed of a switching transistor VT1 and charging circuits R2, C1; the amplifier circuit is composed of VT2-VT5 and resistors R4-R7; the piezoelectric sheet PE and the photoresistor RL form a detection circuit; the control power supply is composed of a stable The pressure tube VD5 and the resistor R3 are formed. The AC power is connected to the control pole of the thyristor VS after being divided by the bridge rectifier and resistor R1, so that VS is turned on (at this time VT1 is turned off); because the light bulb and the diode and VS form a path, the light is on. At the same time, the rectified power supply is charged to C1 through R2: if the gate voltage of VT1 is reached, VT1 is saturated and turned on, and the thyristor is turned off and the lamp is turned off. In the absence of light and sound, an electrical signal is obtained on the piezoelectric sheet, which is amplified to make VT2 conduct. C1 is discharged by VT2 so that VT1 is cut off, and the thyristor controls a very high potential to make VS turn on the light, and the light is automatically extinguished with the charging of R2 and C1. Adjust R5, change the size of the negative feedback, so that the sensitivity of the received sound signal changes, so as to adjust the sensitivity of the lamp. The photoresistor and the piezoelectric sheet are connected in parallel, and the resistance value becomes smaller when there is light, so that the electrical signal induced by the piezoelectric sheet is lost too much and cannot be amplified by VT2, so the light does not light up.
b, component list
VD1-VD4 can choose 1N4004 (of course, rectifier bridge stack, such as BR108, RS307, etc.), VT1-VT5 Choose 9011, VS choose 1~400V plastic tube (such as MCR100-16, MCR1OO-8), etc. R2 choose 0.5W carbon film resistor. R1-R6 selects 1/8W carbon film resistors, C1 selects 47μ/1OV capacitors, C2, C3 selects 10μ/1OV capacitors, among which the requirements for C1 are relatively high. VD5 selects 2CW1O (stable voltage is 2-3.5V), piezoelectric sheet is φ5-φ15, and the dark resistance of the photoresistor is required to be above 1 MΩ.
c. Assembly and debugging
The actual size of the printed circuit board of this energy-saving lamp is 40mm×30mm. When installing, the main circuit can be installed first, and then the experiment can be performed. If feasible, install the detection circuit and amplifier circuit, and finally install the photoresistor. The photoresistor can be selected from MG45-32 or MG45-34 series unsealed type; the piezoelectric sheet can be selected from φ27 piezoelectric ceramic sheet, which requires high sensitivity. Do not use defective or mail-order amateur products, otherwise the sensitivity will be greatly reduced. Piezoelectric ceramic sheet should be installed in the cavity dome with resonance performance, because it only responds to burst sound, and is not sensitive to continuously slowly changing sound, so it has strong anti-interference ability (if an electret microphone is used) It can be used as a sound sensor. Although the sensitivity can be improved, the anti-interference ability will be reduced a lot. After assembly, it can be placed in a small box with moderate volume (such as a pocket radio shell, etc.).
How to implement a dual control switch to control a light?
The circuit connection method of a double-control switch to control a light (upstairs light on, downstairs light off) is (assume: the master knife switch is “upstairs”).
1. Turn off the main knife switch.
2. First prepare two dual-control switches (each dual-control switch has three contacts, up, down, and right); a bundle of red wires is used as a live wire; a bundle of blue The wire is used for the neutral wire, and a bundle of green wires is used for the control wire.
3. First, open the switch box of the two switches, install the two switches on the wall, and use two green The wires are connected. When connecting, the two switches are placed on the front, the upper contact is connected to the upper contact, and the lower contact is connected to the lower contact to form a back-and-forth control line.
4. Use a red wire to connect the right contact of the switch downstairs (if the switch downstairs has a socket on the left, then this wire can be changed to brown or black wire), Check that the wires do not touch and close the cover of the switch box, then connect the wire to one of the terminals of the bayonet base (or the center terminal of the screw base), and then use a blue wire to connect The other end of the bayonet cap (or the threaded socket of the screw cap).
5. Connect the end of the blue wire that just connected the lamp head to the neutral wire.
6. Take a red wire and connect it to the right contact of the switch upstairs, if you are a newbie and you are connecting this kind of switch circuit for the first time, then I recommend you Connect the red wire to a 10cm piece of fuse and connect the other end of the fuse to the right contact of that switch, then you’ll connect the red wire to the live wire. The circuit is complete.
7. Make sure that the fuse you just connected is firmly connected, and close the knife switch carefully. If you see the fuse blowing, the wire sparks, or you hear a popping sound, you must turn it off immediately The main knife switch, however, when you find that the main knife switch is automatically disconnected, you should not force it on, because this is a phenomenon of short-circuit protection. At this point you should recheck the circuit connections. If there is no abnormal situation, then you first turn off the main knife switch (this is very important), then remove the fuse that was just connected, check that the wires do not touch, then close the cover of the switch box, and finally put the switch box. This red wire is officially connected to the live wire. Then the entire installation operation is complete.
What lights are used for balcony decoration?
Generally, there are no lighting facilities on the balconies of the houses currently constructed. At night, the balconies will be covered in darkness. Therefore, a balcony light should be installed on the balconies. If there is a wall between the balcony door and the balcony window, a wall lamp can be installed. The installation height should be 1.8 to 2m from the ground. The lighting material should be glass lamps that are not afraid of the sun and rain; A ceiling lamp with a floating white cover can be installed at the bottom of the upper balcony board. Since the balcony light is only used for lighting during rest, it does not need to be too bright, and the light switch should be installed indoors.
Decoration of balcony chandeliers
It is generally not recommended to install chandeliers on the balcony, because it is necessary to dry clothes, etc., which will be hindered. The simpler the better! If there is no conflict, then the chandelier for balcony decoration will undoubtedly bring a major feature to the home.
Balcony Ceiling Light Decoration
The gorgeous LED ceiling light is a lamp that is adsorbed or embedded on the roof ceiling. The LED ceiling light is generally about 200mm in diameter. The ceiling light is suitable for use in aisles and bathrooms. Commonly used ceiling lamps are square hood ceiling lamps, spherical ceiling lamps, pointed flat round ceiling lamps, hemispherical ceiling lamps, hemispherical ceiling lamps, small rectangular hood ceiling lamps, etc.
The accessories for installing the ceiling light must be matched, and cannot be replaced by others.
Balcony Wall Lamp Decoration
Wall lamps are mostly installed on balconies, stairs, corridors and bedrooms, and are suitable for long-term lights. The installation method of the wall lamp is relatively simple. After the position is determined, the main thing is to fix the lamp holder of the wall lamp, and the wall lamp is often fixed on the wall by the method of embedded parts or punching.
The installation height of the wall lamp should be about 1.8 meters above the eye level. The illumination of the wall lamp should not be too large, which is more artistic. The choice of wall lamp shade should be determined according to the color of the wall. For white or creamy yellow walls, light green and light blue shades should be used. For lake green and sky blue walls, milky white, light yellow and brown shades should be used. The background color wall covering of the same area is decorated with a conspicuous wall lamp, giving people a sense of elegance and freshness. The wires connecting the wall lamps should be light-colored, so that it is easy to paint the same color as the wall to keep the wall clean. In addition, you can first dig a small groove on the wall that just fits the wire, insert the wire, fill it with lime, and then paint the same color as the wall.
