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DB9 Female RS232 to TTL Serial Port Converter Module
DB9 female RS232 to TTL serial converter module for interfacing RS232 devices with microcontrollers.
Description
The DB9 Female RS232 to TTL Serial Port Converter Module is designed to convert standard RS232 serial signals to TTL-level UART communication, enabling easy interfacing between RS232 devices and microcontrollers. Featuring a DB9 female connector, this module allows direct connection to computers, industrial equipment, CNC machines, and legacy serial devices.
It is ideal for use with Arduino, ESP32, ESP8266, Raspberry Pi, STM32, and other TTL-based controllers. Common applications include device programming, data logging, serial debugging, industrial automation, and embedded system development. The compact PCB design ensures easy integration into both DIY and professional projects.
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-  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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