![]() ![]() So, for the OP's application, I'm going to say 'no' - not without modifying the PC's serial port and/or cable. I doubt both can be powered from a standard serial port, and I doubt even more than the serial port it is connected to is 'standard'. Whilst many RF transciever's can operate at very low power using burst comms and low duty cycles, your average MAX232 equivilent uses up a fair few mA. Our USB to RS232 adaptor cable includes a 1 Year Techexpress New Zealand Guarantee. I hate USB-serial adapters, they cause no end of trouble with host software, and latency issues, but they are necessary since the venerable serial port is being dropped from portable computers, and some desktops. USB to RS232 Serial DB9 9 Pin Cable Adapter. RS232 Serial Port DB9 9 Pin Male Plug PC Computer Cable Connector Adapter Male Female. Connecting female 9 pin D-type Hardware Arduino Yún SPlatten May 5, 2014, 2:47pm 1 I have a 9 pin D-type female, with wires soldered to pins 2, 3 and 5. If the OP is connecting his 'max232 and transceiver' to another embedded device, I doubt he would ask about using it for power. It is no different from the suggestions to tap a PC's internal power supply, but with only a modification made to a cheap USB-serial port dongle. But where there's a serial port, there's generally a host system nearby - and therefore, likely a USB port. ' 9 pin serial cable to usb ' Shipped By Newegg ONOFF Direct from Manufacturer ONOFF Cryptocurrency Payment Accepted ONOFF Free Shipping ONOFF Sold by Newegg ONOFF Department Any Category Cables Internal Power Cables Serial Cables Manufacturer Shenzhen Shenzhong TECH. The only way to know which color is connect to what pin is to test with a multimeter.No, obviously not. TX/ RX are often yellow and green, but again you cannot count on this. ![]() male) HP connector can be a bit harder to find. You might hope that signal ground is black/brown, though often it is green, or some other random color. RS232-9 or RS232-25 female connector (serial port connector) 4 pin HP connector, with sockets spaced 2 mm (NOT 0.1') apart Some copper wire Of the above list of parts, most are pretty easy to acquire, and you should be able to find them at your local electronics store. Unfortunately, there is no standard for color coding serial lines. For most modern needs (if "modern" can be used to apply to serial port in 2013) six wires is sufficient. If you know which pins your hardware/software needs, then you would look for a cable that has those pins actually wired. ![]() This cable may be used to connect any RS-232 equipped device to computer, connect two computers via COM serial port and so on. Use this cable to connect two devices equipped with serial RS-232 interface. Depending on your needs, the six connected pins may or may not be sufficient. Comment Edit Submit New DE-9 to DE-9, DE-9 to DE-25 cables. Linterfaccia seriale EIA RS-232 è uno standard costituito da una serie di protocolli meccanici, elettrici ed informatici che rendono possibile lo scambio di informazioni a bassa velocità tra dispositivi digitali. The serial port on a PC is usually a 9 pin D-subminiature connector. Cables that connect only some of the DB-9 serial lines are widely available, though do not assume that the same six pins are connected on all DB-9 cables. The particular cable you have connects the six most popular lines. If your serial communication is one-way then you might only use two pins: TX/ RX and GND. Indeed, there is a number of possible serial connectors). (Note that sometimes particular serial cables are wired in non-standard way, but this is very rare.
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