HDSP-2111

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The HDSP-2111 is a 5 x 7 dot matrix display module that is designed to be compatible with most TTL logic and microcontroller systems. The display can be used for displaying five 7-dimensional characters, numbers, alphanumeric characters and symbols in a single line. The HDSP-2111 is a reliable, low-cost and easy-to-use dot matrix solution for many applications.

Application Fields

The HDSP-2111 is a low-power consumption dot matrix display module that can be used in a variety of applications in the fields of office data processing, industrial devices, communications and medical equipment, traffic control and scanning systems, as well as public information displays. The display is suitable for displaying information such as measuring and monitoring results, control commands, messages and data.

Working Principle

The HDSP-2111 is a monolithic integrated circuit integrated with a 5 x 7 dot matrix display. It consists of a display unit, an input signal processing circuit, an audio circuit and an output control circuit. The display unit is composed of a dot matrix driving circuit, a drive transistor and a LED display. The LED display consists of 35 LED dots arranged in an orderly 5 x 7 matrix, with each dot composed of an anode and a cathode. The anode and cathode of each dot are connected to the driving circuit of the dot matrix display respectively. The driving circuit is controlled by the drive transistor. When the input signal turns the transistor on, current will flow through the LED to the dot, and the dot will then light up if the anode and cathode is connected properly.

The input signal processing circuit consists of an input signal decoder circuit and a multiplex scanning circuit. The input signal is decoded by the decoder circuit and then sent to the multiplex scanning circuit. The multiplex scanning circuit then controls the address of each dot, and sends an address signal to the driving circuit of the dot matrix display. If the address signal corresponds to the address of the LED dot, the transistor turns on, and the corresponding LED dot will be lit.

The audio circuit is used for audio broadcasting. It has an audio input terminal and an audio output terminal. The audio input terminal can be connected to an external audio source, and the audio output terminal is connected to the LED dot matrix display. The LED dot matrix display will light up when the audio signal is transmitted.

The output control circuit is used to control the brightness of the LED dot matrix display. It consists of a DC power supply, a power switch and a dimming circuit. The DC power is sent to the power switch, and the switch can be used to turn the power on or off. The dimming circuit is used to adjust the brightness of the LED dot matrix display. It consists of a potentiometer and a voltage regulator.

Conclusion

The HDSP-2111 is a dot matrix display module that can be used to display characters, numbers, alphanumeric characters and symbols in a single line. This display is suitable for a variety of applications in the fields of office data processing, industrial devices, communications and medical equipment, traffic control and scanning systems, as well as public information displays. It consists of a display unit, an input signal processing circuit, an audio circuit and an output control circuit. The display unit is composed of a dot matrix driving circuit, a drive transistor and a LED display. The audio circuit is used for audio broadcasting. The output control circuit is used to control the brightness of the LED dot matrix display.

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