Adafruit’s Bluefruit EZ-Key enables you to create a wireless Bluetooth keyboard controller in an hour. The module acts as a Bluetooth keyboard and is compatible with any Bluetooth-capable device (e.g., Mac, Windows, Linux, iOS, and Android).
You simply power the Bluefruit EZ-Key with 3 to 16 VDC and pair it to a computer, tablet, or smartphone. You can then connect buttons from the 12 input pins. When a button is pressed, it sends a keypress to the computer. The module has been preprogrammed to send the four arrow keys, return, space, “w,” “a,” “s,” “d,” “1,” and “2” by default. Advanced users can use a Future Technology Devices International (FTDI) chip or other serial console cable to reprogram the module’s keys for a human interface device (HID) key report.
Each Bluefruit EZ-Key has a unique identifier. More than one module can be paired to a single device. The FCC- and CE-certified, RoHS-compliant modules integrate easily into your project.
The 5R7-388 is a bidirectional temperature controller. It can be used in independent thermoelectric modules or in conjunction with auxiliary or supplemental resistive heaters for cooling and heating applications. The solid-state MOSFET output devices’ H-bridge configuration enables the bidirectional current flow through the thermoelectric modules.
The RoHS-compliant controller is PC programmable via an RS-232 communication port, so it can directly interface with a compatible PC. It features an easily accessible communications link that enables various operational mode configurations. The 5R7-388 can perform field-selectable parameters or data acquisition in a half duplex mode.
In accordance with RS-232 interface specifications, the controller accepts a communications cable length. Once the desired set parameters are established, the PC may be disconnected and the 5R7-388 becomes a unique, stand-alone controller. All parameter settings are retained in nonvolatile memory. The 5R7-388’s additional features include 36-VDC output using split supply, a PC-configurable alarm circuit, and P, I, D, or On/Off control.
Global Specialties recently introduced the ASURO Robot, a small autonomous multi-sensored robot developed for educational purposes by the DLR, the German Aerospace Center.
The ASURO is completely programmable in C. Except for the printed circuit boards (PCB), only standard parts are utilized and freeware tools can be used for programming. The ASURO comes unassembled and includes a soldering guide, making it suitable as an introduction into processor-controlled hobby electronics for school, university, and technical education projects.
The ASURO Robot’s features include an ATmega8L microcontroller; an 8-bit AVR-RISC processor; a software and training manual CD; AVR-GCC freeware for use with Windows or Linux; a USB IR transceiver with flash software; remote control and PC-programming possibilities via USB transceiver; wireless control possibilities with optional Bluetooth and 433 MHz RF; six collision-detector sensors; an optical line-tracker unit; two independently controlled 3V-DC motors; an odometer sensor on both wheels; and pre-programmed firmware for easy hardware testing.