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MAX7219 Mini Dot Matrix LED Display Module
MAX7219 mini 8×8 dot matrix LED display module with SPI interface—ideal for scrolling text, symbols, and Arduino projects.
The MAX7219 Mini Dot Matrix LED Display Module is a compact and versatile display module designed for scrolling text, symbols, and simple graphics. Powered by the MAX7219 LED driver IC, it allows easy control of an 8×8 LED dot matrix using a simple serial interface.
The MAX7219 handles multiplexing and current regulation internally, reducing the load on the microcontroller and ensuring consistent brightness across all LEDs. It supports SPI-like communication and requires only three control pins (DIN, CLK, CS), making it ideal for projects with limited I/O pins.
This mini dot matrix module is fully compatible with Arduino, ESP32, ESP8266, Raspberry Pi, and other microcontroller platforms. It is widely used in scrolling message boards, digital indicators, clocks, counters, and DIY display projects.

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- Rated maximum output: ± 4.5A, 40V, Peak 5A, low output impedance, source 0.5?,
- the receiving end of 0.4?, low voltage shutdown, thermal parking and circulation.
- circuit protection. After I design, you can set the current output of 0.5A 1A 1.8A 2.5A.
- 3.3A 4A 4.5A to accommodate more and different motor Current.
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Text to Speech TTL Module (Serial to Speech)
-  Single row 0.1″ header for easy connection to a host system
- Power requirements: +5 VDC
- 30 mA idle
- 46-220 mA active (depending on speech parameters and output load)
- Â Communication: Asynchronous 9600 bps serial (8N1)
- Dimensions: 1.25″x1.5″x0.37″
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Text support rate is better
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 Interface operation is simpler
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5V single power supply.
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Output directly connected to the speaker, can drive 4 ohms 3W / 8 ohm 2W speakers
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Busy status output, can be connected to the microcontroller IO or indicator light, no need to be left floating.
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 Voice effect optimization
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 Module miniaturization and easy integration
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Dimension: 33*27.5mm
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With mounting holes

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