Rs232 To Ttl Converter Schematic. Both usb rs and rs ttl converter seems not to work no led or anything. For basic serial comms between a microchip pic and a pc or other device you generally only need to connect the gnd txd and rxd lines.
The ft8u232am requires a small number of external components to produce a device that converts usb to ttl level rs232 signals. My reasoning is that you might as well make a dual level rs 232 to ttl converter that can be powered from and operate at any logic voltage from 3 0v to 5 0v. I would agree with win van gool and suggest that a max3221 or max3222 is uses instead of a standard max232 providing they are available.
Logic level converter for pic micros ttl cmos the circuit shown will convert logic level voltages to and from rs232 serial voltages levels.
This is the ttl cmos logic inputs and then the converter rs232 logic signals can be obtained from the pins r1 in pin 13 and t1 out pin 14. For basic serial comms between a microchip pic and a pc or other device you generally only need to connect the gnd txd and rxd lines. Rs232 to rs422 converter circuit diagram pdf download for windows 7. The schematic diagram shows the electronic components you need.
