Lonten Tech
Custom 1PCS 8*8 Red Led Dot Matrix Display Common Anode/Cathode 1588BS
Custom 1PCS 8*8 Red Led Dot Matrix Display Common Anode/Cathode 1588BS
Regular price
$0.73 USD
Regular price
$3.73 USD
Sale price
$0.73 USD
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1. The main characteristics of commonly used small LED:
① Light-emitting diode is a unidirectional conductive device. Only current is allowed to flow from the positive electrode to the negative electrode. It only switches on and lights up when it's in a forward connection. The reverse access is blocked. And it certainly doesn't glow. This is similar to ordinary diodes. However, the tube pressure drop of the light-emitting diode is larger than that of the ordinary diode, about 2V, and the power supply voltage must be greater than the tube pressure drop, and the light-emitting diode can work.
The brightness of the LED is related to its working current If, generally when If=1mA. The brightness increases with the increase of lf. But when lf≥5mA. The brightness increase is not significant. In addition, the large working current of the light-emitting diode is generally 20 ~ 30mA, and exceeding this value will damage the light-emitting diode. Therefore, the working current lF should be selected in the range of 5 ~ 20mA, in order to save energy, generally choose lf=5mA.
③ The reverse breakdown voltage of LED is generally about 5V. The LED should not be subjected to reverse voltage exceeding 5V in use. Otherwise the LED will be damaged by breakdown.
① Light-emitting diode is a unidirectional conductive device. Only current is allowed to flow from the positive electrode to the negative electrode. It only switches on and lights up when it's in a forward connection. The reverse access is blocked. And it certainly doesn't glow. This is similar to ordinary diodes. However, the tube pressure drop of the light-emitting diode is larger than that of the ordinary diode, about 2V, and the power supply voltage must be greater than the tube pressure drop, and the light-emitting diode can work.
The brightness of the LED is related to its working current If, generally when If=1mA. The brightness increases with the increase of lf. But when lf≥5mA. The brightness increase is not significant. In addition, the large working current of the light-emitting diode is generally 20 ~ 30mA, and exceeding this value will damage the light-emitting diode. Therefore, the working current lF should be selected in the range of 5 ~ 20mA, in order to save energy, generally choose lf=5mA.
③ The reverse breakdown voltage of LED is generally about 5V. The LED should not be subjected to reverse voltage exceeding 5V in use. Otherwise the LED will be damaged by breakdown.
