Tagged Questions
8
votes
5answers
8k views
Best way to control 75 LEDs with Arduino
I need to control 25 groups of 3 LEDs or 25 RGB LEDs. Each group will be dismissed from the uC by up to 20 cm (about 8 inches). 20 cm is very safe assumption but I think it will be 10 cm or less.
...
8
votes
2answers
454 views
Can I replace this circuit with an IC?
I moved my Arduino-logic-level-5V-to-12V-LED strip circuit off project board and onto Veroboard and I'm very proud to say everything worked first time:
(I'm not at all proud of the soldering job, ...
6
votes
3answers
508 views
Best way to control 130 - 140 LEDS with Arduino Uno 32/64 bit led drivers?
I am new to electronic prototyping and had a few questions.
I need to control 132 LEDs individually. I want to make 3 rows ( 2 rows of 60 and 1 row of 12) I think i can matrix them but i would still ...
4
votes
3answers
192 views
Why are the pins on the official arduino motor shield so long?
Here is the Official Motor sheild website.
The shield has pin connectors at the bottom that are 2x longer than on any other shield I've seen. Why is that?
2
votes
2answers
186 views
Datasheet doesn't include pinout info?
I am trying to connect arduino and usb lancard
In the datasheet, there is USB transceiver interface, containing symbol, type, pin number, description (usb D+ or D- signal).
However, the datasheet ...
2
votes
1answer
103 views
How do I know the resistance of a logic level MOSFET transistor?
I have recently gotten into the microcontroller scene, and I have been stumped with a question all day. My microcontroller's GPIO pins cannot handle more than 20ma; I want to connect a MOSFET ...
2
votes
2answers
621 views
Motor drivers and kickback diodes
I am considering buying one of the hbridge drivers referenced in the below tutorial, but when I looked at the comments underneath the second hbridges sparkfun page, kickback diodes were referenced and ...
2
votes
2answers
215 views
Choosing a MOSFET for solenoid control via Arduino
I'm trying to drive a solenoid I took off an old pinball machine with an Arduino.
The pinball machine ran on 25 V AC and I've found that the solenoid was 2 Ω online (so 12.5 A). The Arduino puts out 5 ...
2
votes
4answers
870 views
How can I drive 12v LEDs from my Arduino Nano?
Background
I am building a scale RC helicopter and ordered a bunch of 3mm LEDs to give it some nice navigation and strobe lights which I plan to drive with an Arduino Nano.
Problem is that I goofed ...
2
votes
2answers
711 views
Arduino and LEDs Power Supply Question
First, thank you to anyone taking time out of their day to read this and answer. Resources like this are incredible for amateurs like myself.
My question is based around power supplies, Arduinos ...
1
vote
2answers
101 views
Controlling a Servo with a TLC5940 (calculating PWM setting)
I'm trying to control a few servos and a bunch of RGB-LED from an arduino board. To do that I'm going to chain together a few TLC5940 chips. The issue I'm trying to resolve at the moment is what PWM ...
1
vote
1answer
192 views
Sparkfun's Quadstepmotor driver and different velocity: concurrency problem?
I'm using quadstepper motor board from Sparkfun:
with Arduino Uno / Leonardo. I can currently driver motors at the same time, but I can't change the velocity separately.
I use this code for ...
1
vote
2answers
2k views
L298 Motor Driver spinning motor only one way :/
i just made a motor driver circuit on a veroboard to use with my arduino
but the problem is l298 spinning motor only one way.
here is the code
it was supposed to spin motor forth and backwards every 2 ...
0
votes
2answers
807 views
0
votes
1answer
363 views
Arduino Leonardo doesn't get auto-detected in Windows 7 (64bit)
I recently purchased an Arduino Leonardo to control my Sumo robot. I plugged it in to my friends computer and was able to use the Arduino IDE to upload code to the board and run a simple wheel-test ...
