Simple Triode Light Control Circuit Control LED Lamp Circuit Diagram
Do not know how many LED, calculate the resistance value, each 2V, adjust 100K potentiometer to the appropriate brightness action.
Use NPN Triode as switch circuit to control led circuit diagram: generally control LED, considering that the power is abundant when the voltage input is high, which makes the LED glow, and saves electricity when the input voltage is low. The 10K sampling potentiometer can arbitrarily adjust the voltage to be controlled, and all resistors can be changed according to the supply voltage to make the circuit work normally.
With few external components and self-starting inside the circuit, only one battery and one capacitor are needed to form a flasher with low cost and good brightness. Figs. 1-6 show a variety of light-emitting diode VD and incandescent lamp H flasher circuits for SG3909. The flash frequency can be adjusted by adjusting the external resistance and capacitance.
Help me with this circuit diagram, adjustable light switch circuit, add 200! Never go back on your word
In the lamp lighting circuit, VS1 is a unidirectional thyristor, only half a cycle of AC voltage is added to the bulb, the effective value of the voltage applied to the bulb is lower, so the brightness is lower (see half-wave diagram).
The dimming of the LED lamp is realized by adjusting the current, that is to say, the IC chip is used to compare the amplifier and the high-power transistor to form an adjustable constant current source circuit. Through the change of the resistance of the adjustable potentiometer, the current through the LED lamp is adjusted to achieve the purpose of dimming.
After the switch is pressed, the circuit circuit is connected, and the current from the positive pole of the power supply passes through the switch, rheostat and LED in turn and then returns to the negative pole. Because the forward guide voltage drop of the LED diode is constant, the current in the circuit is inversely proportional to the resistance value of the rheostat, and the larger the resistance value, the smaller the current.
Ten switches control the circuit of a lamp, as shown in the figure: the two sides are two ordinary single-connected double-control switches, just like double control, adding multi-point control switches to the two control lines of the two switches, also known as halfway engine switches. You can add as many as you want, and you can turn it off freely.
The circuit should be 3V output. Because the input is 5V. In the simplest circuit, 1117 is the LDO (low dropout stabilized power supply) capacitor to eliminate the ripple, the RA1 is the current limiting resistor of the LED, and the DP (LED) is the LED. When the switch (POWER) is pressed, the light-emitting diode is bright and the VCC should have a 3V output to the ground.
In this circuit, the light adjustment switch is equivalent to a voltage regulator, providing a trigger signal for the internal control circuits of two DC motors.
How to adjust the light of high-power led lamp beads
Whether it is a high-power led lamp or a low-power led lamp, want to adjust its light intensity and dimness. Can directly change his supply voltage. However, when changing the supply voltage, we must make some corresponding adjustments in its circuit. When making these circuit adjustments, pay attention to the withstand voltage of the bulb.
Switch dimming switch dimming is through the original lamp power switch for dimming, in the use and installation does not need to add any dimmer, as long as constantly press the number of times and speed of the original power switch can achieve the dimming of lighting lamps to meet the different brightness of personal needs.
First: this dimming method is to modulate the LED driving current to complete the dimming of the LED lamp. Because the brightness of the LED chip is proportional to the LED driving current, we can control the light and shade of the LED lamp by adjusting the LED driving current. Second: this dimming method is called imitation dimming method or linear dimming method.
First of all, park the car 6 meters from the wall, then turn on the light, and then adjust the position of the light according to the position of the light on the wall. Some models are integrated with headlamp height adjustment knobs. If your car has this function, you should set the headlamp height adjustment knob to the “0” position before adjusting the headlights.
Generally speaking, the LED in the ceiling lamp is a number of SMD integrated welding on the aluminum substrate, if the drive power supply is a constant current source, there is an advanced way to take a few small wires and short circuit a few LED. Remember to read the parameters of the power supply identification clearly. It is not advisable to buckle the lamp beads, just replace the driver, that is, the power supply, with a dimmable one.
Which one should you choose to highlight the strip light source?
good. Beidou LED strip light source adopts high brightness LED chip, which has the advantages of high luminous efficiency, strong light brightness, wide irradiation range and light efficiency above 80LM/W. Compared with the traditional fluorescent tube, Beidou LED strip light source can save more energy, no mercury, no ultraviolet, no radiation, and no pollution to the environment.
Dongguan Taihong Optoelectronic Technology Co., Ltd. Taihong Optoelectronic Technology Co., Ltd. was founded in 2009 by Taiwanese Chinese Wang Dongxiao, formerly known as Taihong Electronics Factory, officially opened Dongguan Taihong Optoelectronic Technology Co., Ltd. in 2013, the company is located in Dongguan Tangxia High-tech Park.
Haoshun Automotive Decoration parts Co., Ltd. is a professional manufacturer of automobile lighting. While devoting itself to the research project of beauty car, we constantly update our knowledge, accept new industry ideas, and follow the material selection standard of “excellence in the best” and the production control of excellence.
Environmental protection: environmental benefits are better, there are no ultraviolet and infrared rays in the spectrum, neither heat nor radiation, small glare, and waste can be recycled, no pollution, no mercury, cold light source, can be safely touched, is a typical green lighting source.
Ring light source (OPT-RI series) features: ring light source provides different angles of irradiation, can highlight the three-dimensional information of the object, and effectively solve the problem of diagonal shadow. High-density LED array, high brightness; a variety of compact designs to save installation space; optional diffuse plate light guide, light uniform diffusion.
Circuit diagram of led dimming power supply
The simplest LED lamp circuit: ac part, 500ohm current limiting resistor, IN4007 rectifier diode, current source with 0.68microcapacitor and 0.2A insurance. The 10-micromethod electrolytic capacitor is used as a filter capacitor to make the output current more stable. LED can be composed of multiple light emitting tubes in series.
The dimming of the LED lamp is realized by adjusting the current, that is to say, the IC chip is used to compare the amplifier and the high-power transistor to form an adjustable constant current source circuit. Through the change of the resistance of the adjustable potentiometer, the current through the LED lamp is adjusted to achieve the purpose of dimming.
It is more reliable to buy a ready-made dc-dc step-down converter board (such as the board of lm2596 chip) directly. Look for it on XBao. A few yuan, input connection 12v, output connection led light can be. Just replace the on-board adjustable resistance of the converter board with a potentiometer with the same resistance value.
