USB sound card based on PCM2760

Here the USB Sound Card circuit based on PCM2706 which dedicated for USB audio. With USB controller module inside PCM2706, there is no more additional programming to the IC. The computer system will automatically detect this circuit when connected tho the USB port. You will get stereo audio channel output from this circuit.

• 1x PCM2706 – 32-PIN TQFP
• 1x 12 MHz Crystal
• 1x 1M Resistor
• 4x 3.3K Resistor
• 2x 1.5K Resistor
• 2x 22 Ohm Resistor
• 2x 15 Ohm Resistor
• 2x 100uF Capacitor
• 2x 47uF Capacitor
• 4x 1uF Capacitor
• 2x 22nF Capacitor
• 2x 27pF Capacitor

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Explanation for ZX360 Series USB 3.0 Connector

This is ZX360 Series USB 3.0 Connector, USB 3.0 connector enables maximum data transmission speed. Hirose has developed a USB 3.0 connector that significantly increases data transmission speeds from those of a USB 2.0 connector. Designated the ZX360 series, these B-type connectors allow transmissions up to 5 Gb/s, almost 10 times faster than USB 2.0 connectors. The higher speed enables seamless, uncompressed transmission of high-speed data such as high definition (HD) moving pictures and is ideal for portable audio, cell phones, smart phones, cameras, mass storage devices, and notebook computers.

The ZX360 provides 10 pins that allow for an all-signal configuration rated at 1 A per pin or a power/signal combination arrangement where pins 1 and 5 are rated for 1.8 A per pin and pins 2-4 and pins 6-10 can then only run at 0.5 A per pin. It has an operating temperature of -30°C to 85°C and a rated voltage of 30 VAC.

The connector, which is supplied without the overmold and measures 12.85 mm by 5 x 2.5 mm is RoHS-compliant and halogen-free. It has been tested to show an average contact resistance of 30 mΩ and an average mating/unmating force of 7.3 N and 13.7 N respectively. Insertion and withdrawal force remains stable over 10,000 cycles of mating/unmating operations.

Digi-Key P/N	Packaging	Manufacturer P/N	Description
H11887-ND		ZX360-B-10S-UNIT	CONN PLUG USB 3.0 MICRO B
H11888CT-ND	Cut Tape (CT)	ZX360-B-SLDA	SHIELD PLATE TOP FOR ZX360 PLUG
H11888TR-ND	Tape & Reel (TR)
H11889CT-ND	Cut Tape (CT)	ZX360D-B-10P	CONN RCPT USB 3.0 MICRO B SMD
H11889DKR-ND	Digi-Reel®
H11889TR-ND	Tape & Reel (TR)

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allows two computers to share a single USB printer or some other USB device through USB Printer Share Switch Electronic suite

This simple USB Printer Share Switch Electronic Suite device allows two computers to share a single USB printer or some other USB device, such as an external flash drive, memory card reader or scanner. A rotary switch selects the PC that you wish to use with the USB device, while two LEDs indicate the selected PC.

The most common way to share a USB printer between two PCs is to use one machine as a print server. However, that’s not always convenient because it means that the server PC must always be on if you want to print something.

The circuit uses switch poles S1a-S1c to select either USB socket CON1 or CON2 and connect its pins through to CON3. The fourth pole (S1d) selects either LED1 or LED2, to indicate which PC has been selected.

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Lighten your desktop by using USB LED Suite Schematic

Here is a simple USB powered lamp that can be used to light your desktop during power failures.

• The circuit operates from the 5 Volt available from the USB port.
• The 5V from the USB port is passed through current limiting resistor R2 and transistor Q1.
• The base of transistor Q1 is grounded via R1 which provides a constant bias voltage for Q1 together with D2.
• The diode D1 prevents the reverse flow of current from battery.
• C1 is used as a noise filter.
• Two white LED’s are used here for the lamp, you can also use a 2 V torch bulb instead of LED’s.
• LED D3 indicates connection with USB port.

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control a number of LEDs via USB by using USB-LED-Fader

The USB-LED-Fader is a device to control a number of LEDs via USB. Built it to display the online status of my internet connection, the recording status of my video recorder (VDR), and warnings if the available disk-space is low.

You can imagine an endless number of applications for this. The LEDs are controlled with pulse width modulation (PWM). That way, they are not only on or off, it is possible to control the brightness. Included in the device are a number of ‘waveforms’ that can be displayed through the LEDs.

That way, one LED can display some kind of a sine- or triangular wave without any interaction with the controlling host. Every LED can be controlled individually; each one can display its own waveforms.

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USB communication and 16-bit DSC handles dual motor control

dsPIC33 and PIC24 architecture

Microchip's latest dsPIC33 and PIC24 chips (Fig. 1) share a common 60 MIPS core with the dsPIC33 providing additional signal processing instructions. They contain up to 512 Kbytes of progam flash plus an additional 24 Kbytes of auxilary data flash. Programming the latter does not slow down the processor. The chips also have up to 52 Kbytes of RAM.

The chips have USB 2.0 On-The-Go (OTG) support along with an array of peripheral interfaces including CAN 2.0, I²C, UARTS and SPI ports. There is also a parallel master port (PMP). The audio side handles I2S and AC97 codec support. The analog side has 3 comparators and 32-channel 12-bit ADC.

The ADC can be used for motor control. The PWMs can handle a pair of 3-phase motors. There are two quadrature encoder interfaces (QEI) as well.

The dsPIC33EP512MU810 Dual Motor Control Plug-In Module (PIM) incorporates a single processor but has a cable allowing it to plug into two Microchip dsPICDEM motor control development boards. Each board handles a single 3-phase BLDC, PMSM, ACIM or 2-phase stepper motors. This makes it significantly easier to develop dual motor applications.

The dsPI33 and PIC24 chips are supported by Microchip's MPLAB including the latest Netbeans-based MPLAB X (see NetBeans Powers New PIC IDE). A number of development kits are available including the dsPIC33E USB Starter Kit (Fig. 2) and five PIMs for platforms like Microchip's Explorer 16. The dsPIC33E and PIC24E are available in 64-pin QFN and TQFP packages, 100- and 144-pin TQFP, 121-pin BGA, and 144-pin LQFP packages. Pricing starts at $4.98.

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