Door Unlocker Using RFID

The RFID door unlocker is based on a PIC16F630 microcontroller in which the purpose is to unlock any college dorm doors by allowing a serial of password to be entered on the other side via a PS/2 keyboard.

A Single-Sided Circuit Board by Using Conductive Pens

The project illustrates the construction of a circuit board wherein only one side has the printed wiring while on the other side are all the components.

Real-Time Audio processing Based on Arduino

The project is an experiment to illustrate that an Arduino can be used to create a real-time audio processing wherein the first set of examples alter an incoming audio signal to an audio output and the second set are outputted computed waveforms.

Logic Analyzer in Miniature Size

This simple mini logic analyzer was designed with a hardware, software, and firmware interface which will buffer the signals sent from the parallel port of the computer to the circuit board for testing.

Construction of the Voice Shield

This Voice Shield project was created which is capable of playing audio sound bytes as it represents an analog audio shield for the Arduino.

Locater Device for Ham Radio Repeater

A ZiLOG microcomputer comprises the Ham Radio Repeater Locator which has flash memory used to store the frequencies and locations of several thousand repeaters.