DIY archive at Embedded Dreams

Jul
29

EDuino - our vision of serial Arduino

NunoDIYComments (20)

Our vision of serial Arduino

We release here our serial Arduino compatible board: EDuino!! This project consists of a few versions of serial Arduino boards. A full featured Arduino is nice to use while developing projects, but when you make lots of projects it is a bit expensive to buy an Arduino board to be permanently installed in each one of them. Some other times, you would like to have a smaller Arduino. The aim of this project was to provide cheap, compact and easy to build boards that can be built at home and permanently integrated into projects. The PCBs are all single sided and the need to drill holes kept to a minimum (not to say none at all). The boards use a few SMD components but they are not hard to solder, consisting only of a few resistors and capacitors; soldering “big” (1206 size) SMD components is something that “barks” but doesn’t “bite” :).

All of this work is licensed under Creative Commons BY NC SA. And all images are clickable for a bigger view.

Feb
25

LED bargraph series - Is it hot or cold?

NunoDIY, Tutorial, edChipsNo Comments

How’s the temperature today? Cold, good or hot? Ambient temperature can be easily measured without any special temperature sensor. You just need… a common diode! Well, actually, a diode and a resistor. Diodes change their forward voltage drop at a rate of approximately -2.3 mV per degree Celsius (ºC), so we just need to measure that voltage.

You may want to start by reading Setting up a LED bargraph. Check also our other Free Articles.

Feb
18

Article series on using a LED bargraph

NunoDIY, Tutorial, edChipsNo Comments

I’ll be writing a few articles on easy and fun things you can do with a linear LED bargraph such as our Linear bargraph LED scale module, and this 1st one is meant to show you how to make the basic adjustments. Keep on reading and stay tunned!

Feb
8

Circuito de sonido divertido y fácil de construir!

NunoDIY, TutorialComments (15)

Spanish version of our article Fun and easy to build buzzer circuit!

Me encontré con este circuito cuando tenía alrededor de 14 años y he jugado con él durante años. Este fue probablemente el circuito que más me fascinó en mis primeros años y que despertó en mí la pasión por la electrónica. Lo vi por primera vez en las revistas de electrónica brasileña, algunos de ellos ainda hoy en la prensa, pero un seguimiento de su origen a un circuito de un libro escrito en 1960 por Lou Garner - Transistor Circuit.

Este circuito es un oscilador, y es capaz de generar una onda de sonido, un tono. La frecuencia del tono (si es un sonido mas agudo o grave) es controlado por la resistencia variable. La potencia del sonido de este circuito es considerable, no ponga su oído demasiado cerca del altavoz de la primera vez !

Oct
6

Fun and easy to build buzzer circuit!

NunoDIY, TutorialComments (16)

Me and this circuit met when I was around 14 years old and I played with it for years. This was probably the circuit that most fascinated me in my early years and that awoke in me the passion for electronics. I saw it for the first time in Brazilian electronics magazines, some of them still in print today, but I tracked its origins to a circuit from a book written in 1960 by Lou Garner - Transistor Circuits.

This circuit is an oscillator, and is able to generate a sound wave, a tone. The tone’s frequency (if it’s a high or low sound) is controlled by the variable resistor. The sound volume of this circuit is considerable so, don’t put your ear too close to the speaker on the first run .