free usb mp3 player circuit board project

Lithium Polymer Batteries are a very common source of power today. Many electronics gadgets have one inside, and they have some reasonable features. I've bought great batteries, with different sizes and capacities for my electronics projects. So long I'm using...

USB Data Acquisition

The Universal Serial Bus (USB) has become a widely adopted technology for connecting computer peripherals. It is present on nearly every new computer and typically offers a seamless connection method for a variety of consumer electronics devices such as digital...

USB Printer Share Switch

This device allows two computers to share a single USB printer or other USB devices, such as an external flash drive, memory card reader, or scanner. A rotary switch is used to select the PC that will use the USB...

USB Printer Chooser Switch

With a DPDT switch, I can switch the two data lines. I tried connecting the shields from the two computers together, the grounds two computers together, switching the D+ and D- lines with the DPDT switch, and leaving the VBus...

usb car charger

This project involves a mini USB car charger circuit that is simple to construct using only three components. The core of the circuit is the LM78M05 integrated circuit (IC), which is a 5V positive voltage regulator. This IC includes several...

usb only sc1

The modification made is based on the SC1 modification by Steve Chambers and further improvements by Phil Davis, but it does not utilize the additional parallel port connection. All differences from the original SC1 modification and Phil's improvement are considered...

FT232 USB to Serial Module

This project utilizes the FT232XX chip series, which functions as a USB to serial converter. These chips are capable of converting USB protocol into asynchronous serial protocol, effectively allowing the transformation of a USB1 port into a corresponding serial port....

Access Flash Drives with a Microcontroller

USB flash drives offer a convenient method for storing various types of information in a compact form. Also referred to as thumb drives and USB keys, these drives are well-suited for applications in data loggers and other projects based on...

usb power supply with lm2575

Additional power supply for USB devices. Refer to the page for an explanation of the related circuit diagram. The additional power supply for USB devices is designed to enhance the power availability for devices that may require more current than what...