Cheap and beautiful NE555 switching power supply
Outdoor Led Display screens for rental-- Die casting cabinet
LED technology is the latest and the best in terms of the audio visual technologies out there and it is still evolving. There is a strong emphasis in making LED display screens energy efficient, cost efficient and light weight apart from other quality requirements. Hence,Stage LED screen cabinets are also now expected to be lighter in weight. This need has resulted into the gradual shift from the iron cabinet, aluminum cabinet, to the cast-aluminum and die cast aluminum as the weight of the cabinet is lighter. Cast aluminum and die cast-aluminum cabinets are the latest of the cabinets used for LED casing.
The cast aluminum and die cast-aluminum cabinets have high strength and high tenacity. They are highly efficient, provide excellent heat dissipation, energy conservation and environmental protection. Because of their outdoor usage, Rentel led display cabinet is made as a waterproof cabinet of leasing cast aluminum. They are lightweight and ultrathin. They are quite flexible for easy packaging and lifting. They have a high refresh rate, high grayscale and are widely applied to the stage renting. They are easy and simple to install and thus help you save on precious time and man power as one-person can easily do the insallation. Cabinet splicing and wiring connection is fast and reliable. Not only great in looks dept. it can be easily dismantled. Casting Aluminum and die Casting Aluminum Cabinet also have better deformation resistance property.
Rental Led Display, Rental Led screen,Stage Led Screen, Led Display screen Shenzhen Priva Tech Co., Ltd. , https://www.privaled.com
As shown in the figure, a step-up switching regulator power supply circuit composed of 555 is used. In the circuit, the transistor BG1 is used as a switching adjustment tube; the operational amplifier IC1 constitutes a comparison amplifier; and the 555 time base circuit is connected to an astable multivibrator. The oscillator generates a sawtooth voltage on C1 (Vmin=1/3Vz, Vmax=2/3Vz, the frequency is determined by W1 and C1) and is sent to the non-inverting input of comparator IC1. The sampled voltage is sent to the inverting input of the comparator. . The duty cycle of the IC1 output rectangular waveform is controlled by the sampling voltage. When the output voltage is a stable value, the sampling voltage is a value between 1/3Vz and 2/3Vz. When the output voltage rises (or falls) for some reason, the sampling voltage rises (or falls), causing the duty cycle of the IC1 output rectangular wave to decrease (or increase), and the on-time is shortened (or increased). The output voltage drops (or rises) to achieve a stable output voltage. Adjust W to control the output voltage. 