Signal Adapters and Extenders

The Pololu RC switches make it easy to turn devices on and off with a standard hobby radio control (RC) system. Several versions are available, ranging from one with a simple digital output to modules with integrated MOSFETs, relays, or multiplexers.


Pololu item #: 2595
Price: $2.50
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This tiny logic level shifter features four bi-directional channels, allowing for safe and easy communication between devices operating at different logic levels. It can convert signals as low as 1.5 V to as high as 18 V and vice versa, and its four channels are enough to support most common bidirectional and unidirectional digital interfaces, including I²C, SPI, and asynchronous TTL serial.

Pololu item #: 1308
Price: $5.95
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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.

Pololu item #: 391
Price: $14.95
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The Pololu USB-to-serial adapter is a tiny unit that makes it easy to connect a microcontroller project to a PC. You can connect the adapter directly to a microcontroller without an RS-232-to-TTL level converter. It is USB 2.0-compatible and will work with your existing programs that interface with a serial port.

Pololu item #: 1606
Price: $14.99
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This USB to serial (RS-232) adapter lets you connect your RS-232 serial devices to a USB port on your PC or laptop.

Pololu item #: 126
Price: $11.50
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This deluxe serial port adapter (RS-232 adapter) converts logic-level signals to the higher voltages required for RS-232 and similar serial ports. Unlike competing units, the Pololu serial adapter operates over a 3-5.5 V supply range and gives you access to all eight of the signal lines available on a DB9 connector, including five transmit lines and three receive lines.

Pololu item #: 127
Price: $9.95
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This item is the partial kit version of the 23201a serial adapter. All surface-mount components are assembled; the 0.1″ breakaway male header strip and DB9 connector are included but not soldered.

Pololu item #: 2159
Price: $12.95
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This I²C extender board from SJTbits enables the operational range of an I²C bus to be extended significantly. By transparently converting the data and clock lines to differential signals and back, they allow I²C devices to communicate at distances of over a hundred feet.