Lighting

Power Pic RGB with voltage control 

Power Pic RGB with voltage control, is yet another circuit with a power RGB led. Its color and intensity are selected by two independent voltages.

Power Pic RGB with a Prolight 3W RGB LED and remotely controlled 

This project is another evolution of Pic RGB using a powerful LED combined with an infrared receiver, allowing a person to select the desired color on a remote control using SIRC encoding. The firmware was rewritten to allow the colors to be selected on an HSV color space.

Power Pic RGB with a Prolight 3W RGB LED 

This project is an evolution of Pic RGB using a powerful LED. The original circuit was revised to use a Prolight 3W LED inside a full size globe lamp. The firmware is the same (version 3a) of project Pic RGB.!

Pic RGB color generator 

This project is based on an idea from the portuguese edition of Elektor magazine issue of Jul/Aug 2007.
The original project uses a ATMEL Tiny microcontroller and assembly code. This version uses a PIC 12F629 and C code!

Candle simulator

This is a small circuit I built in December 2006 for Christmas holidays. It simulates the waving effect of the light of a candle when the air flows through it.

PicPOV - Persistence of View


PicPOV is a project based on 'persistence of vision'.  A PIC microcontroller blinks 8 LEDs on and off so that when waved through the air, a message appears to float in front of the viewer.

Robotics

Tiny Remote for iRobot Roomba 

The Tiny Remote is a very compact infrared remote control with only two buttons to control an iRobot Roomba. It is built mostly using SMD components to reduce its size, nearly to the size of a keychain and is powered by a CR2032 coin battery.

Small Virtual Wall for Roomba 

Small Virtual Wall for Roomba, is a circuit that emits the same infrared pattern as a iRobot Lighthouse, preventing Roomba vaccum cleaner robots from crossing their infrared beams, acting as virtual walls. The software also sends other commands to the robot, on demand.

Device Drivers for microcontrollers

Interrupt driven SIRC decoder (device driver)

Interrupt driven SIRC decoder, is my Sony SIRC infrared decoder.  It is the infrared decoder of the Power Pic RGB infrared project and was developed to be integrated on any project that requires a decoder that doesn't block the program's main loop.

General Electronics

LM3914 Battery Monitor

This is a bar-graph voltmeter for a 12V battery based on the well known LM3914 IC. It was developed mainly because it gives a nice look to the UPS, with its red, yellow and green leds. It is also easier to read than conventional digital or analog voltmeters.

A front panel for the D945GCLF Intel Motherboard

This is a simple circuit with two buttons and two LEDs to control the d945gclf Intel motherboard.

Microcontroller programmer / SCHAER Programmer

This is my implementation of the SCHAER+ parallel port programmer.

Audio projects

Pic Sound Player

Have you ever heard a PIC microcontroller speak? No? Then this project is for you.
Using a PIC 18F1320 and some sound samples it is very easy to make it reproduce them using just one pin.

Analog audio preamplifier with tone equalizer

Very very old project from 1994. The preamplifier is based on an old TDA1524 stereo tone/volume control circuit. It also includes a stereo VU-meter based on the LB1403N.

Analog audio 2x12W Stereo Power Amplifier

Power amplifier that complements the audio preamplifier from 1994. It's based on the TDA2616/N1 from NXP(external link). It is able to drive two 8Ω speakers with a single supply voltage of 12V or more (Max 22V at full output power).