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PCM1794A Audio DAC
Posted on Friday, April 9, 2010   •   Category: Audio DAC


This is DAC with integrated circuit PCM1794A. It is one of excellent audio DACs from Burr Brown (Texas Instruments). It has 24-bit resolution, 192kHz sample frequency, 8x oversampling digital filter, differential current output and SNR 127dB.


DIR9001 SPDIF Decoder
Posted on Friday, April 9, 2010   •   Category: Audio DAC


For transfer of digital audio between devices is standardized S/PDIF interface (electrical) and TOSLINK (optical) for commercial use, or AES3 for professional use. S/PDIF decoder module is used for converting of this interface to I2S interface, which is usually used on audio DACs. For conversion we can use for example integrated circuit CS8416 or DIR9001. In building of DAC in past I had troubles with resetting circuit CS8416 in hardware mode. Now I select DIR9001 which works perfectly and he has lower jitter than CS8416.


USB Audio DAC with PCM2704
Posted on Friday, April 9, 2010   •   Category: Audio DAC


I needed high quality DAC convertor from USB to S/PDIF. Circuit has analog output for headphones and digital S/PDIF output with electrical and optical(TOSLINK) interface. We can use too 3 HID buttons for setting volume and mute. For USB input is used standard miniUSB connector. Headphone output uses standard 3.5" stereo jack socket. For signal conversion from TTL level to differential signal is used RS-485 bus transceiver. For optical output is used optical transmitter TOTX173 from Toshiba.


USB - Relay Board
Posted on Friday, April 9, 2010   •   Category: USB Circuts


Here is the new 6 channel relay USB board to switch different devices, lighting or motors by a computer program via the USB interface.


MAX3420 – Maxim USB Peripheral Controller
Posted on Thursday, April 8, 2010   •   Category: USB Circuts


The MAX3420 is a USB peripheral controller chip with an SPI bus. This page hopefully contains enough information to help you easily make use of the device in your projects. The MAX3420 provides a very simple approach to adding a USB interface to a circuit. It uses a SPI bus to connect to your system. It does require a reasonable amount of configuration and control, so you’ll need to connect it to some form of microprocessor/microcontroller.


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