There are many different protocols and voltages for electronic communications. To get one device to talk to another you can use an adaptor/converter to change the voltage level or to translate between the different protocols like I2C, USB, RS285 and TTL Serial.
Computers tend to have only USB connections these days but small electronics typically use other light weight protocols so most of our adaptors connect from USB to one of I2C, TTL serial, RS485.
Code: COM-40015
Need more IO? This analog and digital multiplexer-demultiplexer breakout board provides 16 IO channels using just 5 pins on a microcontroller. Digital signals like I2C, Serial are supported as well as analog IO. Operates over 2-6V. More Details...
Code: COM-40001
The USB-ISS module is a new enhanced version of Devantech's low cost USB-I2c module. The USB-ISS is able to connect to I2C, SPI and Serial buses as well as Digital I/O and Analog inputs. Powered from the USB cable the adaptor supplies 5v @ 70mA and operates as an I2C master. Works with Windows CE... More Details...
Code: COM-40029
Devantech's low cost USB-I2c module. The USB-I2C module is a low cost USB to I2C module, with a simple command set, and interfacing to any I2C device. The USB-I2C module provides a complete interface between your PC and the I2C bus. The module is self powered from the USB cable and can supply up... More Details...
Code: SKU-000489
This cable is a USB to 5V TTL level serial converter and cable in one. The reliable FTDI chip is the FT232RQ. One end is a standard type A plug found on computers and the other is a 6 pin 0.1" female header with connections for RTS, RX, TX, 5V, CTS, GND. More Details...
Code: COM-40004
The Pololu USB AVR programmer is for AVR-based controllers such as the Pololu Orangutan robot controllers and the 3pi robot. The programmer emulates an AVRISP v2 on a virtual serial port, making it compatible with standard AVR programming software. It also includes a TTL-level serial port and a S... More Details...
Code: COM-40005
The FTDI basic breakout board by SparkFun Electronics is ideal for programming the Arduino Pro 328 and Arduino Pro Mini 328 via a USB cable. It is also usefull for general serial applications. The board includes TX and RX LEDs to monitor traffic plus it can be configured to work at 3.3V via a jum... More Details...
Code: COM-40018
Easily connect 3.3V devices to a 5V system or vice versa with this little logic level converter from SparkFun. Supports I2C, SPI, TTL Serial and other digital signals. Not compatible with analog signals. More Details...
Code: COM-40024
What do you do if you've got a laptop and need RS232 serial? This is a high quality, low cost, small, and easy to use USB to RS232 converter with a cable. Driver support for Windows, Mac, and Linux RedHat. More Details...
Code: COM-40028
This USB-to-serial adapter lets you easily connect a TTL serial device to a PC by acting as a virtual serial port. The board is a Micro-USB carrier for the Silicon Labs CP2104 USB-to-UART bridge that provides access to all of its control signal pins and GPIO pins. More Details...
Code: SKU-000488
The FTDI cable is a USB to Serial (TTL level) converter which allows for a simple way to connect TTL interface devices to USB. The VCC pins of this FTDI cable are configured to operate at 5V with 3.3V I/O. The FTDI cable is designed around an FT232RQ, which is housed in a USB A connector. More Details...
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