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How can I read the I/O bit on a RS232c PC serial interface to light LEDs? Answered

I'm building a circuit to read bits from a RS232c PC serial interface and command LEDs groups, a bit a group. Bits are sent by a PHP code written on a site to accessed anywhere. The circuit board must then be plugged on the laptop at place where the LEDs are installed. Please, can anyone help me on building this project? I appreciate any help.



10 years ago

With just 3 connections you could use a shift register - clock, data, and enable (enable is optional). Those are the standard serial interfaces - perhaps you could wire it up and just send 1 8-bit packet.