PCM2702 Based USB Sound Card

A fully functional USB sound card has been designed based on a great IC PCM2702 as the core of this construction that contains 16-bit stereo digital to analog converter with USB interface.

Interactive Media Player with Wireless Feature

The Wireless Interactive Media Player (WIMP) is basically an MP3 stereo system with a wireless connection to a PC.

Portable Headphone Amplifier Known as CMoy

The CMoy portable headphone amplifier was designed for testing purposes while using a single OPA134 op-amp in a non-inverting configuration.

PIC16F877-Based eDrum Circuit

The project illustrates the design of electronic drums where detailed information on how to build an electronic trigger to MIDI converter module is found, based on PIC microcontroller along with the building of the triggers.

Homemade MP3 Player with USB Support

The project was designed to create an MP3 player that is based on USB hard drive which can replace the use of CD players.

VU Meter Made on a Breadboard

The project is based on LM3915/LM3916 to produce a VU meter with the level indication using 10-segment LED bar graph.