Tripath TA0105A 800Wx2 Super Class-T Audio Amplifier

Tripath TA0105A 800Wx2 Super Class-T Audio Amplifier

Brief introduction
This product uses rare TA0105A digital amplifier driver from Tripath. It is regarded as one of the best amplifier chip. Famous audio equipment's Audio Research has used it chip to design their  Model 300.2 amplifier.
audio amplifier
Features
Use IRFP4227 as the power MOSFET
- 800Wx2 output power (4Ohm, 10THD)
- Designed with rare TA0105A class-T amplifier chip
- 0.1% THD @ 500W 4Ohm
- Dimension: 185x115mm
- All made with HiFi components
- Main power: ±58V to ±90V
- Need 5V 0.1A and 12V 0.3A as digital power

VMA2016-EVB

Brief introduction
http://www.siliconray.com/vma2016-evb.html
This board is a tiny power amplifier board designed with VMA2016. It has one stereo audio input jack, 1 power supply connector and 2 speaker connectors. There's one jumper for enable signal  and tow for gain setting of VMA2016. With the outstanding performance of VMA2016 audio amplifier module it can drive 2 8Ohm speaker to unbelievable10W per channel! You just can't believe this small board can singing that loud. The noise is very low and sound quality is excellent (0.07% THD+N). Ultra small size makes it very easy to fit in any speaker boxes to build an active speaker.

Siliconray:NE555 Timer / Oscillator

Siliconray:NE555 Timer / Oscillator
NE555
Brief introduction:
The 555 monolithic timing circuit is a highly stable controller capable of producing accurate time delays  or oscillation. In the time delay mode of operation, the time is precisely controlled by one external resistor and capacitor. For a stable operation as an oscillator, the free running frequency and the duty cycle are both accurately controlled with two external resistors and one capacitor. The circuit may be triggered and reset on falling waveforms, and the output structure can source or sink up to 200 mA.

Features:
Max. operating frequency greater than 500 kHz
Turn-off time less than 2 ms
Temperature stability of 0.005% per °C
Timing from microseconds to hours
Adjustable duty cycle
Operates in both astable and monostable modes
High output current
TTL compatible
Applications:
Precision timing
Pulse generation
Sequential timing
Time delay generation
Pulse width modulation

Factory Pair Matched main grade 300B-Z power tube

Derscription
Factory Pair Matched main grade 300B-Z power tube

Features
- Super alloy technology
- Use "High Polymer Compound Carbon" material
- Gold grid
- Factory pair matched
- Gold plated pin, ceramic base
- Super high vacuum
- Suited for 10W audio power amplifier
Note
- The Royal Edition has better match accuracy and package.
http://www.siliconray.com/factory-pair-matched-shuguang-300b-98-tube-1.html

Siliconray：Atmega128 Standard Kit

Siliconray：Atmega128 Standard Kit
http://www.siliconray.com/catalogsearch/result/?q=Atmega128+Standard+Kit

CPU：ATmega128 has 128K Flash、4K SRAM and 4KByte EEPROM, and chip can exchange with ATmega64
MAX485 used for 485 industry test
I2C bus device 24C02, EEPROM data memorizer and 8kBit EEPROM
Infrared receive connector test
Stepper motor driver test
DC Motor test
12C RTC chip used for calendar and clock test
SPI device, 74HC595 drives 4bit 7 -segment LED
SPI device, DAC7512 12bit D/A converter
Flip-latch: 74HC573 latches and drives 8 bit LED
RS232 connector Max232A
8 input keys, 1 reset key
4 bit dynamic scanning 7 -segment LED and 8 bit LED
1 active buzzer
2 A/D input tunable potentiometer
LCD1602and LCD12864 connector
JTAG emulational connector
AVR ISP download connector

Standard configuration:
1 TS8900-M128 development board
1 UART cable
1 AVR-USB emulator
1 DAC7512 digifax convert chip
1 infrared telecontroller
1 stepper motor driver
1 multiple flat cable
1 1.8GB-DVD CD
10 jumpers, 4 screws and 4 multiple-screw bolts

microcontroller evaluation board design Atmega128 Professional Kit

http://www.siliconray.com/catalogsearch/result/?q=Atmega128+Professional+Kit
Resources of development board:
* DAC audio output
* SD/MMC storage port
* 64K SRAM connected on EBI bus
* CP2102 USB-to-UART bridge
* 2 LED display processors
* 176*220 TFT display module
* ADS7843 touch screen input
* 5-way navikey input
* Photo resistor and potentiometer ADC input
* High-accuracy RTC clock
* Buzzer output
* 2 RS232 ports
* All I/O and EBI bus are led out to extend easily
* JTAG and PDI debugging program

Processor features:

* 128K+8K（BOOT）flash memory ，8K RAM and 4K EEPROM inside
* External Bus Interface for up to 16M bytes SRAM or 128M bit SDRAM
* 4-channel DMA Controller with support for external requests* Eight-channel data bound system
* 8 16-bit Timer, PWM generator and input capture
* 8 USARTs: IrDA modulation/demodulation for one USART
* 4 Two-Wire Interfaces with dual address match (I2C and SMBus compatible)
* 4 SPI (Serial Peripheral Interface) peripherals
* 16-bit Real Time Counter with separate Oscillator
* 2 Eight-channel, 12-bit, 2 Msps Analog to Digital Converters
* 2Two-channel, 12-bit, 1 Msps Digital to Analog Converters
* 4Analog Comparators with Window compare function
* External Interrupts on all General Purpose I/O pins
* Programmable Watchdog Timer with Separate On-chip Ultra Low Power Oscillator
* AES and DES Crypto Engine
* 64 –foot TQFP package, 50 I/O connectors
* Speed performance: – 0 – 12 MHz @ 1.6 – 3.6V
                     – 0 – 32 MHz @ 2.7 – 3.6V
Development board features:
The product has been burned-in BOOTLOADER program, consumer can download program by USB to XMEGA development board to debug without buying any development tools.

Standard configuration
*AVR-XMEGA3 development board
*1 USB cable
*1 UART cable
*6V power supply
*1 CD

Siliconray:12ax7+12au7 hifi tube preamplifier

Siliconray:12ax7+12au7 hifi tube preamplifier