LED — Volts and Bytes

Sure Electronics Matrix Display Test

November 2, 2010 By Jer 7 Comments

Few weeks ago, I purchased a 32×8 LED matrix board from Sure Electronics. It was a very nice board and I was really excited to use it in one of my projects.

This board is composed of four 8×8 LED matrix modules and HT1632 LED matrix driver. It can be powered by a 5VDC supply and at least three microcontroller pins are needed to control the board.

I tested the board using my 28-pin AVR breakout board and ATmega8 microcontroller. It was not very complicated to use but, to make things easier, I am planning to write my own library for this board.

Here’s the video of the test.

Hey, take a look also at my project about 8×8 LED matrix board using an AVR microcontroller.

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Filed Under: Articles, Trials and Reviews Tagged With: ATmega8, LED

tinyPOV – Yet Another AVR POV Project

October 2, 2010 By Jer 18 Comments

This microcontroller project is another version of a persistence of vision or POV toy. It has 8 LEDs and it is powered by ATtiny2313 (AVR microcontroller by Atmel) operating at 2 x AA batteries. This is a tiny toy and it can be carried easily inside your pockets.

[Read more...]

Filed Under: Projects Tagged With: AVR, LED, Persistence of Vision, POV

Breakout Board Collection

September 22, 2010 By Jer 4 Comments

I make a lot of breakout boards that I usually use in my hobby projects. Most are input/output devices but some are microcontroller breakout boards.

Let me share them with you.

1. 4×4 Keypad Matrix

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Filed Under: Projects Tagged With: AT89C2051, AVR, Breakout, Breakout Board, Buzzer, DIP Switch, Keypad Matrix, LED, MAX232, micro SD, PIC, PIC16F88, Potentiometer, power supply, Push Button, RGB, RGB LED, RS232, SD card, seven segment display, TTL

DIY Digital Thermometer 2

August 31, 2010 By Jer 13 Comments

Few months ago, I published my first DIY digital thermometer. However, like any simple projects/prototypes, that project needs some improvements. Previously, I used a voltage regulator that has a 100mA rating. Though it was able to source current to the whole circuit, it gets too hot easily. Another problem with that was that the voltage regulator was very close to the sensor. Since the voltage regulator heated up easily, it always affected the temperature reading of the digital thermometer.

To solve those problems, I came up with a second version of digital thermometer. [Read more...]

Filed Under: Projects Tagged With: ADC, ATtiny26, AVR, LED, LM35, Sensor, seven segment display, temperature, thermometer

I/O Led Monitor

July 11, 2010 By Jer 2 Comments

A light-emitting diode (LED) is a semiconductor diode that emits light when an electric current flows through it. It is a very useful device used in electronics. LEDs can be used for lighting, indicators, and even data communications. They are also very power efficient and they are used instead of traditional electric lamps because they can be as bright as lamps while consuming less power than the lamps. [Read more...]