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rs232 ttl module

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rs232 ttl module Customers Reviews

  • A cheap & small must-to have product

    posted by bigjack65

    Offer interface to RS232 for 3,3 and 5V project with ease, low cost and in little space. Nowadays many devices works with 3,3V and if you have to connect to devices with the old but affordable, simple and standard RS232, this is a gread solution. You have an industry standard miniaturized MAX3232 with all the capacitors needed in a very little and cheap board.
    I have embedded one in a 9pin cannon shell to create a very simple and small interface for my experiment. Works great.
    Many devices (ex. with embedded Linux...) have pads for serial console but these are a ttl level, This inteface can be easily embedded in any enclusure to provide a standard RS232 connection.I'll buy another soon, it is a must-to-have in the drawer of every laboratory.
  • Good for personal proyects

    posted by aferruelo

    This is a good and cheap device that provides TTL signals from a USB portI use this to reprogram some modems and works perfect.I has 2 different power lines 3.3v and 5v that help a lot because not all the devices are the same.It came with a different color wires that helps identify each signal
    For the price I dont think there is a better solution.
    Must have!
  • Not cheap, but does the job well.

    posted by rigorka

    This is certainly the most simple way to connect your RS232 equipment (for example, the UPS management port) to your Arduino.
    The best way to test it with Arduino is by using the SoftwareSerial library. This allows you to use Arduin's primary RX/TX pins to send/receive the debug output to your computer via USB, while SoftwareSerial is used to get the RS-232 data from this device.
    Straightforward solution for those needing RS232 interface but feeling to lazy to put together their own level converter.
  • Exactly what I was looking for

    posted by Edreams

    Perfectly fits into my projects! No more silly wires! I can finally combine some of my 30 year old equipment with my more modern stuff. There are also all sorts of nifty mods that you can do to this one, such as firmware changes.
    This also provides an excellent way to push code to your Arduino. You don't even have to have the device in the same room.
    Buy it! I'm going to be buying more of these for more projects. I wish these existed 30 years ago...
  • Excellent RS232/TTL converter, does what it says on the tin

    posted by heypete

    Simple, easy to connect, and works exactly as expected.Mounting holes in the PCB make it easy to mount in an enclosure.I connected the inputs and outputs to an oscilloscope, and the MAX3232 produces sharp, clean, well-defined signals on both the RS232 and TTL sides.The TTL output voltage matches Vcc (that is, set Vcc to 3.3V and the TTL output signal range will be 0-3.3V. Set it to 5V and it will be 0-5V.). This makes it easy to match the output voltage to your TTL circuits.The RS232 output voltages range between -5/+5V regardless of Vcc voltage (the chip has built-in charge pumps to increase the voltage for the RS232 transmitters). In compliance with the RS232 standard, it can tolerate RS232 input voltages of -25/+25 volts.While most people would just use the pins marked TX/RX to connect one RS232 device to one TTL device, the MAX3232 supports a second bi-directional channel.
    The board is contains a MAX3232 RS232-to-TTL converter and the necessary capacitors, a few LEDs to indicate when the chip is sending data, a female DE9 connector to connect to your RS232 device, and a 4x2 pin header to connect to your TTL device. Simple and handy.The primary bi-directional channel is connected to pins 2 (RX) and 3 (TX) on the DE9 connector (RS232) and to the TX and RX pins on the board, respectively. Be sure you connect the pins correctly: connect the TX pin on the MAX3232 board to your TTL device's RX pin, and the RX pin on the MAX3232 board to your TTL device's TX pin. Connect Vcc and GND to your TTL device.The second bi-directional channel is not connected to the DE9 connector and is only accessible on the pin headers. Connect your RS232 device's RX and TX pins to R2O ("RS232 out, channel 2") and R2I ("RS232 in, channel 2"), respectively. Connect your TTL device's RX and TX pins to T2O ("TTL out, channel 2") and T2I ("TTL in, c
    This board saves makes it easy to connect an RS232 device to a TTL circuit using a MAX3232 chip. I highly recommend it.The MAX3232 in this board functions the same as the very common MAX232 chip which only runs on 5.0V; the difference is that the MAX3232 runs on 3.0-5.5V input which makes it great for 3.3V TTL circuits.

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