Schematic Diagram: usb

Showing posts with label usb. Show all posts

Wednesday, November 19, 2014

Schematic diagram of a USB player

Usb series player is an electronic device or electronic circuit that functions as an MP3 player that is stored on a storage device such as USB flash.

In this usb circuit using an IC as a modifier of digital voice data into analog so that it can be applied to a headphone, or again through the power amlplifier strengthened so that it can be heard through the speakers. IC used in this circuit using IC PCM2902 as a modifier of a digital data into analog data storage.

Below is a schematic diagram of a USB player.

Schematic usb player

Tuesday, October 14, 2014

PIC Prototyping board 18F2550 – USB enabled

That’s a very nice PIC Prototyping board based on 18F2550 USB enabled microcontroller. Author writes:

“The board features a USB port that can be used with a bootloader for easy programming. Five analog inputs are brought out (AN0-AN4) which can be used to read analog sensors, as well as the two CCP ports which can be used to control servos or other devices. A user LED is built in, using RA4. The onboard USART ports are brought out to a three pin header which can be used to talk to other microcontrollers, or to an RS232 device with a MAX232 level converter. The whole of PORTB is brought out to a header, as well as a pair of power headers. An ICSP header rounds out the board for programming the PIC.”

PIC Prototyping board 18F2550 – USB enabled

Saturday, September 13, 2014

USB Power Injector

Create USB PowerInjector for GSM Modem Maximizing and stabilization USB voltage .

Sometimes we need also to extend the USB cable connection. Usually cable so the store is no more or less than one meter. If the cable is good quality automatic reduction of voltage and current remain so flash media or a modem to function remained normal.

Sometimes the two media are not readable because of a decline in flow due to cable resistance is very large, so that lost power wasted.

USB injector circuit

If this happens often flash or USB modem off often error-disconnected. To overcome this decrease in voltage performance. The principle is quite very simple. You simply "inject" is indeed voltage VCC 5VDC needed a modem or a flash.

Finishing USB inject

After using the USB power injector is expected regardless of the length of external cable fixed voltage maximum. The principle works is simple enough original 5VDC voltage of the CPU / your computer off and then injected external voltage that has been prepared. IC (integrated circuits) AN 7805 was instrumental once that is out and stabilize the voltage between 4.8 to 5.2 VDC and the current required at least 500mA.