Comments for The Electronics Hobbyist

Comment on Arduino RGB LED Spinning Night Light by Arduino RGB LED Control for the Spinning Night Light | The Electronics Hobbyist

Tue, 27 Jul 2010 05:08:17 +0000

[...] looking at the parts list for the Arduino RGB LED spinning night light you must have noticed that current limiting resistors of different values were used for the Red and [...]

Comment on Arduino Motor Control for the Spinning Night Light by GuruSantiago

GuruSantiago — Tue, 20 Jul 2010 17:02:11 +0000

GuruSantiago really likes this circuit. Some additional info. The “Kickback” is also referred to a back EMF (electo-motive force), it is the opposite polarity of the signal applied. Hence, the diode should always be connected so that it is reversed biased.

Thank You,
GuruSantiago

Want to learn more about electronics?

The GuruSantiago can help. Checkout his videos here:

http://www.youtube.com/user/ElectronicsIsFun
And follow him on twitter @ElectronicsFun

Comment on Arduino RGB LED Spinning Night Light by Arduino RGB LED Spinning Night Light: Assembly | The Electronics Hobbyist

Arduino RGB LED Spinning Night Light: Assembly | The Electronics Hobbyist — Tue, 13 Jul 2010 05:03:25 +0000

[...] the previous post if you need to see the sketch for the Arduino RGB LED night light [...]

Comment on Arduino 2-Digit 7-Segment Display Counter: Sketch by Arduino 2-Digit 7-Segment Display with Buttons: Sketch | The Electronics Hobbyist

Fri, 09 Jul 2010 21:59:19 +0000

[...] The last part of the loop() function refreshes the display, and is very similar to the sketch for the 2-digit 7-segment display counter. [...]

Comment on Arduino RGB LED Spinning Night Light by Tweets that mention Arduino RGB LED Spinning Night Light | The Electronics Hobbyist -- Topsy.com

Tue, 06 Jul 2010 06:57:56 +0000

[...] This post was mentioned on Twitter by Arnon Katz, Natalia F. Norman. Natalia F. Norman said: New post: Arduino RGB LED Spinning Night Light http://goo.gl/fb/oCYYW #uncategorized [...]

Comment on Arduino 2-Digit 7-Segment Display with Buttons: Sketch by Tweets that mention Arduino 2-Digit 7-Segment Display with Buttons: Sketch | The Electronics Hobbyist -- Topsy.com

Tue, 29 Jun 2010 08:24:02 +0000

[...] This post was mentioned on Twitter by Arnon Katz, Natalia F. Norman. Natalia F. Norman said: New post: #Arduino 2-Digit 7-Segment Display with Buttons: #Sketch http://goo.gl/fb/q0VM0 #project #7segmentdisplay [...]

Comment on Controlling a Seven-Segment Display Using Arduino Part 4 by Arduino 2-Digit 7-Segment Display with Buttons: Sketch | The Electronics Hobbyist

Tue, 29 Jun 2010 05:34:48 +0000

[...] was used on the sketch for the single-digit 7-segment project a couple of months ago. It updates digit1 with the remainder of the division of itself by 10, which [...]

Comment on Controlling a Seven-Segment Display Using Arduino Part 1 by Arduino 2-Digit 7-Segment Display Counter: Sketch | The Electronics Hobbyist

Mon, 21 Jun 2010 16:05:19 +0000

[...] Function lightSegments was reused from the single-digit 7-segment sketch: [...]

Comment on Controlling a Seven-Segment Display Using Arduino Part 2 by João Alexandre da Silveira

João Alexandre da Silveira — Thu, 17 Jun 2010 00:58:21 +0000

Here is another sketch to show the position of a 10k potentiometer in the Arduino analog pin 0 in 0-9 digits in a 7-segments display.

/*
potDigital
Mostra a posição de um potenciometro no mostrador de 7 segmentos
by João Alexandre da Silveira
http://www.OrdemNatural.Com
16 junho 2010
*/
#define pausa delay(1000) //define uma pausa de 1 segundo

int digito0[7]={1,1,1,1,1,1,0}; //matriz dos segmentos do digito 0
int digito1[7]={0,1,1,0,0,0,0}; //digito 1
int digito2[7]={1,1,0,1,1,0,1}; //digito 2
int digito3[7]={1,1,1,1,0,0,1}; //digito 3
int digito4[7]={0,1,1,0,0,1,1}; //digito 4
int digito5[7]={1,0,1,1,0,1,1}; //digito 5
int digito6[7]={1,0,1,1,1,1,1}; //digito 6
int digito7[7]={1,1,1,0,0,0,0}; //digito 7
int digito8[7]={1,1,1,1,1,1,1}; //digito 8
int digito9[7]={1,1,1,1,0,1,1}; //digito 9

int pinoUSADO[7]={2,3,4,5,6,7,8}; //matriz dos pinos usados no Arduino
int i=0; //contador para a estrutura ‘for’
int potPin=0; //potenciometro no pino 0
int conversor; //

void setup(){
for(i=0; i<7; i++){
pinMode(pinoUSADO[i],OUTPUT); //configura cada pino usado como saida
}
}

void loop(){
conversor=analogRead(potPin)/100; //converte a entrada 0-1024 para a faixa 0-10

switch (conversor) {
case 0:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito0[i]); //acende o digito 0
}
break;

case 1:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito1[i]); //digito 1
}
break;

case 2:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito2[i]); //digito 2
}
break;

case 3:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito3[i]); //digito 3
}
break;

case 4:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito4[i]); //digito 4
}
break;

case 5:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito5[i]); //digito 5
}
break;

case 6:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito6[i]); //digito 6
}
break;

case 7:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito7[i]); //digito 7
}
break;

case 8:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito8[i]); //digito 8
}
break;

case 9:
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito9[i]); //digito 9
}
break;
}
}

Comment on Controlling a Seven-Segment Display Using Arduino Part 2 by Natalia

Natalia — Thu, 17 Jun 2010 00:11:41 +0000

I’m originally from Brazil, too, Joao. Thanks for your input. Also, check out the final version I wrote where the segment array for each digit is bit packed and is unpacked using the bitRead function to light each segment. It just makes for shorter code and uses less memory. You can check it out here:
http://www.theelectronicshobbyist.com/blog/2010/02/controlling-a-seven-segment-display-using-arduino-part-4-of-4/

Comment on Controlling a Seven-Segment Display Using Arduino Part 2 by João Alexandre da Silveira

João Alexandre da Silveira — Wed, 16 Jun 2010 23:53:12 +0000

I write a new version of this sketch for a common catode dispay. The comments are in portuguese, I am from Brazil. Here it:

/*
Digitos0a9
Mostra a cada segundo os digitos 0 a 9 no mostrador de 7 segmentos
*/
#define pausa delay(1000) //define uma pausa de 1 segundo

int pinoUSADO[7]={2,3,4,5,6,7,8}; //matriz dos pinos usados no Arduino
int i=0; //contador para a estrutura ‘for’

void setup(){
for(i=0; i<7; i++){
pinMode(pinoUSADO[i],OUTPUT); //configura cada pino usado como saida
}
}

void loop(){
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito0[i]); //acende o digito 0
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito1[i]); //digito 1
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito2[i]); //digito 2
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito3[i]); //digito 3
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito4[i]); //digito 4
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito5[i]); //digito 5
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito6[i]); //digito 6
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito7[i]); //digito 7
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito8[i]); //digito 8
}
pausa;
for (i=0; i<7; i++){
digitalWrite(pinoUSADO[i],digito9[i]); //digito 9
}
pausa;
}

Comment on Controlling a Seven-Segment Display Using Arduino Part 4 by Natalia

Natalia — Wed, 16 Jun 2010 20:48:42 +0000

Argh, somehow your comment slipped out of my radar. Sorry Emily for not replying before. You may have already gotten your answer somewhere else, but you can also check my post from June 1st 2010, 2-digit 7-segment display counter:
http://www.theelectronicshobbyist.com/blog/2010/06/arduino-2-digit-7-segment-display-counter/