Black Dreambox Remote Control 41 Keys For DM8000HG / DM500S

Dreambox Remote Control 41 Keys For DM8000HG;DM500S;DM600 PVR;DM7020

Emission distance, emission angle (15 degrees, 30 degrees, 45 degrees, 60 degrees, 90 degrees, 120 degrees, 180 degrees), emitted light intensity and wavelength of the infrared emitting tube. The above are physical parameters, and it is necessary to understand its electrical performance parameters: 3mm and 5mm are small-power infrared emitting tubes commonly used in the market, 8mm and 10mm are * * rate and high-power emitting tubes. The forward voltage of the low-power emitting tube is 1.1-1.5v, the current is 20mA, the * * rate is the forward voltage: 1.4-1.65v 50-100ma, and the forward voltage of the high-power emitting tube is 1.5-1.9v200-350ma. The 1-10W high-power infrared emitting tube made by Yuxing electronics can be used for infrared monitoring and lighting.
principle
Ordinary infrared emitting tubes are similar in appearance to ordinary visible LEDs, but they emit infrared rays. The tube voltage drop is generally about 1.4V, and the working current is generally less than 20mA. In order to adapt to different operating voltages, the loop is often connected with a finite current resistor. When the infrared ray is emitted to control the corresponding controlled device, the control distance is proportional to the transmission power. In order to increase the control distance of the infrared ray, the infrared light emitting diode works in the pulse state. Because the effective transmission distance of the pulsating light (modulated light) is proportional to the peak current of the pulse, the emission distance of the infrared light can be increased by increasing the peak IP as much as possible. The method to improve IP is to reduce the pulse duty ratio, that is, the width t of the compressed pulse. For some color TV infrared remote controllers, the working pulse duty ratio of the infrared light emitting tube is about 1 / 3-1 / 4; The duty ratio of infrared remote controller for some electrical products is 1 / 10

Infrared emitting tubes are mainly used in various photoelectric switches and remote control emitting circuits. They have the functions of fast response and low energy consumption.
Infrared emission tube, an electrostatic control electronic tube that generates or amplifies high-frequency power, sometimes also known as an oscillation tube. The transmission tube used in audio or switching circuits is called modulation tube. Transmission tube is the main electronic device in radio broadcasting, communication, television transmission equipment and industrial high-frequency equipment