Tagged Questions

4
votes
1answer
44 views

analogRead(0) or analogRead(A0)

The arduino reference states that you would use the following code to read the value from analog pin #5: int val1 = analogRead(5); However to read from digital ...
10
votes
2answers
33 views

Why do some pins have `~` signs next to their numbers?

I was looking at my Arduino Uno and I noticed that symbol by digital pins 11, 10, 9, ...
1
vote
2answers
254 views

Help verify 8x8x8 LED cube circuit

I am a beginning hobbyist when it comes to electronics. I have read lots of theory but I only have a little bit of hands on experience. I would like to build an 8x8x8 LED cube and I came up with this ...
-1
votes
1answer
109 views

Mobile Server Uplink / GPS Coordinate Packet? [closed]

I'm completely uneducated when it comes to more advanced electrical engineering. I understand the very basics. I have over 12 years in software development / programming, but would like to extend my ...
1
vote
2answers
259 views

Switch hookup with relay (arduino)

Hey all i have the following 5v relay board: Please ignore the light bulb hook up. That was an example on the website that had the same relay :) And i am looking to hook one of the relays up to a ...
10
votes
1answer
880 views

Getting a large number of (~100) digital output signals from Arduino

I would like to be able to control around 100 independent LEDs using an Arduino. The problem is that the Arduino does not have nearly enough pins that can be configured for this. What would be a way ...
0
votes
0answers
41 views

Loking for help in a pov led design capable of video [closed]

Im looking for someone who has the expertise to design a pov capable of video using full color and similar to the big wheel pov for bicycle's, the one I want designed and built will have approx, 72 ...
2
votes
2answers
845 views

Arduino controlling separate traffic light

I have an arduino that can turn on 3 LED's separately. I also have this traffic light (12v with 3 plain-old lightbulbs) that, when plugged into an outlet, turns on all of the lights. What could I ...
0
votes
2answers
245 views

Analog Inputs on Arduino

Something that is confusing me on the Arduino is the Analog Inputs. Can they be used as normal I/O Digital or only I Analog?
2
votes
2answers
902 views

read 12V logic pin from arduino using an NPN transistor

I have an inductance sensor on a CNC machine that goes 12V high when triggered (open collector when not) . I want to read that input on my arduino who uses 5V logic. I was thinking I could just use a ...
0
votes
0answers
35 views

Digitally programmable switch using minimum space (without relays) [duplicate]

Possible Duplicate: How to short two nodes electronically I want to make a pcb containing about 32 switches (that do a physical connection between wires) each can be programmed digitally ...
4
votes
1answer
1k views

Measuring real and apparent power

I hope my question is in accordance with the rules of the site. I'm doing a power meter using a voltage transformer, a current transformer and an arduino, besides the components to create the ...
7
votes
6answers
3k views

How is binary converted to electrical signals?

I'm just starting off in electronics and am already fascinated. Having played with an arduino these last few days, I'm aware that binary is a representation of different voltages - such as +5V ...
2
votes
2answers
874 views

How to bring a digital input pin to high state?

This sounds really very easy, but I'm afraid to try it because I don't want to fry my microcontroller. I'll use an Arduino for an example, but it should be the same for all microcontrollers. ...