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Connecting a microcontroller to RS-232 ports
This project use a PIC16F877 microcontroller connect to a PS/2 mouse and to a PC.The project come with SS PCB
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ISOLATED FULL DUPLEX RS232C INTERFACE
This self powered interface circuit electrically isolates the TxD and RxD lines from the PC serial port and protect the PC from direct connection to hazardous voltages.
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Isolated RS232C for PIC16F84
Connect serial transmit bit of the transformerless supply PIC16F84 circuit with COM1 through the use of isolation device. Protect your notebook from direct connected to power line.
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RS232 transceiver circuits
rs232 transceiver circuit which commond used for communicated between microcontroller and other devices such PC or any devices that use rs232.Here is a collection of rs232 transceiver circuits that popular for today.
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RS232C Level Converter
A basic RS232C Level Converter
---540
Simple RS232C Level Converter using Transistors
Here is another simple and cheap circuit using small signal transistor providing TTL to RS232C level converter.
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