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MICRO USB TO SERIAL ADAPTER AMAZON FULL
MICRO USB TO SERIAL ADAPTER AMAZON PRO

The Pro Mini will have an extra pin that is grounded for this purpose. This essentially tells the adapter that it is always clear to send data.

You will also note that the CTS input to the FTDI adapter is grounded, or held at a digital LOW. Note that the Transmit and Receive lines are crossed between the two devices, which makes perfect sense if you think about it. To connect the FTDI adapter to the Pro Mini you need to match the signals up as follows:

CTS – Clear To Send, a control signal sent back from the Pro Mini to let the FTDI adapter know it can send data.

VCC – The Power supply voltage, either 3.3 or 5 volts DC.

RX – Receive, the line that receives data from the Pro Mini.

TX – Transmit, the signal sent out from the FTDI adapter.

DTR – Data Terminal Ready, a control signal sent to the Pro Mini from the FTDI adapter to let it know that it is ready to send data.

The connections on the FTDI adapter for the Pro Mini are as follows: The two FTDI adapters also wired backward from each other! The connector on the blue Pro Mini (the 5-volt one) is reversed from the connector on the red Pro Mini (the 3.3-volt one). In the above image, I show a couple of Arduino Pro Minis and two FTDI adapters. In most cases you can just directly attach it, however one important thing to note is that this connector (and the connector on the hPro Mini) is not always mounted the same side up. Your FTDI adapter will have a connector, usually a 6-pin male header, to attach to the Pro Mini. Make sure you get the voltage setting correct, applying 5-volts to a 3.3-volt Pro Mini can damage or destroy it! Connecting the FTDI to the Pro Mini The FTDI adapter will have a method of selecting the correct supply voltage, this is usually in the form of a jumper, a switch or a trace on the circuit board that needs to be cut or jumpered. The FTDI adapter not only provides a USB port to allow you to communicate with the Pro Mini, it also supplies power.īecause the Pro Mini is available in both 3.3-volt and 5-volt models it is critical that you give it the correct supply voltage. They are easily obtained on eBay or Amazon, as well as most well-stocked electronics stores.įTDI adapters come in several shapes and sizes, all of them will have a USB (usually Mini USB) port and a 6-pin connector to attach to the Pro Mini. The adapters we are interested in are produced by several manufacturers and are used to interface USB or serial ports to microcontrollers. In addition to interface chips, the company also manufactures a wide range of video adapter and other integrated circuits. Using the FTDI AdapterįTDI is an abbreviation for semiconductor manufacturer Future Technology Devices International. To program and debug a Pro Mini you will use an external device, called an FTDI Adapter.

Once that is done with the USB port just sits there, taking up both space and consuming some current. While this may seem like a major drawback it isn’t really, in many Arduino projects the USB port is only used for programming and debugging. For most applications, this will not be an issue.īut for all its extra versatility the Pro Mini has one feature lacking – it has no USB port. The 3.3-volt Pro Mini runs at a slower clock speed, 8 MHz. This opens up the possibility of creating battery powered projects, or directly interfacing with 3.3-volt logic devices. This is due to the surface-mount version of the processor having more leads than the DIP version that the Uno is based upon.Īnother way that the Pro Mini outshines its bigger brother is that it is available in both a 5-volt and 3.3-volt model. One way in which it is more capable than the Uno is that most Pro Mini designs have two additional analog input ports, which can also double as extra digital I/O pins. In fact, in many ways, the Pro Mini is even more versatile than the Uno.

MICRO USB TO SERIAL ADAPTER AMAZON FULL

The Pro Mini uses a surface-mount ATMega328, giving it the full power of the Arduino Uno in a much smaller package. You will have no problem finding one at a very low price.Īs its name would imply the Pro Mini is a very tiny device, it’s not much bigger than the DIP version of the ATMega328 chip. Although no longer available from the official Arduino store it is an open-source design and is now manufactured by several different companies. The Arduino Pro Mini was originally developed by SparkFun. And, as a bonus, we will build a battery-powered controller for a small robot arm. Of course, there is a way around this, so follow along and see how the Pro Mini can be useful for your next Arduino design. However programming the Pro Mini is done a bit differently than an Uno, mainly because the Pro Mini has no USB port. In fact in some ways it is even more versatile, and it’s small form factor and low cost makes it ideal for use in permanent projects. Although the Pro Mini is a small device it is quite powerful, as it uses the same processor chip as the Arduino Uno.