SKY / Dreambox Remote Control 41 keys 8-10m Black Plastic

Infrared TV Remote Control with forty-one keys For SKY / Dreambox / set top box

The infrared light emitting diode, which is widely used, emits an infrared wavelength of about 940nm, which is the same shape as ordinary light emitting diode, but with different color.

Infrared led generally has black, dark blue, transparent three colors.

The way to judge the quality of infrared led is the same as that of ordinary diode: measure the positive and reverse resistance of infrared led with multimeter electrical block.

The luminous efficiency of infrared light-emitting diodes can only be accurately determined by special instruments, but can only be roughly determined by the pull-apart method in amateur conditions.The infrared receiving tube of the receiving part is a photosensitive diode

In the practical application to the infrared receiving diode add reverse bias, it can work normally, that is, the infrared receiving diode in the circuit application is the reverse application, so as to obtain higher sensitivity.

Infrared receiving diodes are generally round and square.

Since the transmitting power of infrared led is generally small (about 15mW), the signal received by infrared receiving diode is relatively weak, so it is necessary to increase the high-gain amplifier circuit.

Some years ago, some special amplifiers such as PC1373H and CX20106A were commonly used.In recent years, whether amateur production or formal products, most of the finished infrared receiver