Atmel Micro & Optrex Graphics LCD Development Kit

This is a complete Optrex Graphic LCD development kit.  It includes the Optrex/Atmel AVR board pre-loaded with demo code (royalty-free source code included).  It also includes a genuine Atmel AVRISP mkII programmer and cable, and the ATMEL AVR CD which contains AVR Studio.  Another CD is also included which contains the complete set of data sheets and board schematics, as well as some helpful files to aid in C-code development.   from $27.99 More Info Customer Comments Published article in Atmel's Journal #7

We use Atmel AVR microcontrollers, which are very similar to Microchip PIC processors, because we believe you will find them very easy to work with.  Atmel AVR microcontrollers have a separate interrupt vector for each interrupt, and a host of other hardware features, making code development a breeze.   The Atmel development tools are easy to learn, and AVR Studio is a free download from www.atmel.com/avr   AVR Studio now includes a FREE integrated C-compiler (AVR GCC)!  Additional AVR tools such as emulators and debuggers can be purchased from Atmel.

When you are ready for production, visit www.apollodisplays.com for volume LCD display pricing.

Lab Board – Audio Signal Processing

This system can be used as a demo board or lab test board  for audio frequency processing circuits.  It is typically hooked to a microcontroller's A-to-D converter that process audio signals and allows for easy testing and development.  It includes a Xilinx FPGA controlling a precision sine wave oscillator (Xilinx comes pre-programmed, but the Xilinx source code is not included), a microphone preamp (with AGC), and various other audio circuits, including an amplifier and  built-in speaker. $129.99 More Info

OTA – Operational Transconductance Amplifier

The OTA is a transconductance type device, which means that the input voltage controls an output current by means of the device transconductance, labeled g_m. This makes the OTA a voltage-controlled current source (VCCS), which is in contrast to the conventional op-amp, which is a voltage-controlled voltage source (VCVS).

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VVR - Voltage Variable Resistor

The VVR is a resistor whose resistance changes in accordance to an applied voltage.  VVRs are used in Synth (Electronic Music Synthesizer) filters and amplifiers, other analog audio circuits, and auto-nulling bridge circuits.  The VVR should not be confused with a digital potentiometer.

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