avatar

SFUptownMaker

Member Since: July 5, 2011

Country: United States

Profile

Role

Electrical engineer

Programming Languages

Python, C/C++

Universities

NDSU 1997-2002

Interests

Toys, tinkering

Websites

uptownmaker.blogspot.com

Some notes (and examples) to help you understand a bit more about the world of digital imaging.

Continue reading

The FreeSoC2 board is a great way to start using the incredibly powerful PSoC5LP processor line from Cypress Semiconductor.

Continue reading

As an engineer at SparkFun, I make a lot of temporary projects. The Magic Lunchbox helps me take them home to work on without damaging them.

Continue reading

Ever wonder how the Arduino IDE translates your code into instructions for the processor?

Continue reading

Radio Shack is finally declaring bankruptcy, but for many of us, it died a long, long time ago

Continue reading

FTDI's latest driver update appears to be semi-permanently disabling counterfeit FT232 chips.

Continue reading

To compare the Edison and the Raspberry Pi is to do a disservice to both.

Continue reading

In which I buy a cheap truck, planning on using my hacking skills to keep it going, and the universe calls my bluff

Continue reading

When in New York, I found a small group of hackers in as surprising place

Continue reading

Quad Fever!

Quadcopter fever is spreading through SparkFun! Of course we're going to hack them.

Continue reading

How Python makes my life easier every day

Continue reading

Technological befuddlements it took me 10 years and a college degree to understand.

Continue reading

New!

Simblee LilyPad Hookup Guide

February 4, 2016

The Simblee LilyPad lets you easily integrate Bluetooth Low Energy and mobile apps into your e-textiles projects.
New!

Simblee Concepts

February 4, 2016

The Simblee module is a powerful but easy to use Bluetooth 4.0 device which allows you to create a GUI from directly within your Arduino code!
New!

Simblee Breakout Board Hookup Guide

February 4, 2016

This guide will help you understand your SparkFun Simblee Breakout Board.

FemtoBuck Constant Current LED Driver Hookup Guide V12

December 10, 2015

The FemtoBuck board is a high-efficiency, single-channel constant-current LED driver.

SparkFun Blocks for Intel® Edison - 9 Degrees of Freedom Block

August 19, 2015

A quick overview of the features of the 9 Degrees of Freedom Block.

SparkFun Blocks for Intel® Edison - Dual H-Bridge

July 17, 2015

A quick overview of the features of the Dual H-bridge Block.

SparkFun Blocks for Intel® Edison - PWM

June 22, 2015

A quick overview of the features of the PWM Block.

Assembly Guide for RedBot with Shadow Chassis

May 28, 2015

Assembly Guide for the RedBot Kit. This tutorial includes extra parts to follow to go along with the RedBot Inventor's Kit tutorial.

Experiment Guide for RedBot with Shadow Chassis

May 28, 2015

This Experiment Guide offers nine experiments to get you started with the SparkFun RedBot. This guide is designed for those familiar with our SparkFun Inventors Kit and want to take their robotics knowledge to the next level.

FreeSoC2 Introduction

May 14, 2015

The FreeSoC2 is an Arduino-compatible PSoC5LP-based development board, produced by SparkFun in collaboration with Jon Moeller (developer of the original FreeSoC) and Cypress Semiconductor.

Wake-on-Shake Hookup Guide

March 13, 2015

A basic hookup guide for getting started with the SparkFun Wake-on-Shake.

BC118 BLE Mate 2 Hookup Guide

January 15, 2015

Hooking up and using the BLE Mate 2, which uses the BC118 BLE module from BlueCreations.

Programming the Intel® Edison: Beyond the Arduino IDE

January 7, 2015

Intel's Edison module goes beyond being just another Arduino clone. Check this tutorial for advice on how to get the most out of your Edison by writing code in C++!

Sunny Buddy Solar Charger V13 Hookup Guide

October 13, 2014

How to hookup the Sunny Buddy: a solar-powered, MPPT (peak-power tracking), LiPo battery charger.

FTDI SmartBasic Hookup Guide

October 3, 2014

How to use an FTDI SmartBasic Board to program an Arduino and access another serial device over the hardware serial port, without unplugging anything!

MiniGen Hookup Guide

May 22, 2014

Using the MiniGen, SparkFun's Arduino Pro Mini signal generator shield

Understanding the BC127 Bluetooth Module

January 31, 2014

SparkFun has two boards using the BC127; here's what you need to know to use them.

Digital Logic

October 3, 2013

A primer on digital logic concepts in hardware and software.

MiniMoto DRV8830 Hookup Guide

September 19, 2013

MiniMoto is an I2C-based low-voltage DC motor driver.

Getting Started with the AutoDriver

September 9, 2013

SparkFun's AutoDriver is a powerful tool for controlling stepper motors. Here's how to use it.

PicoBuck Hookup Guide

August 30, 2013

The PicoBuck board is a high-efficiency three-channel constant-current LED driver.

Using GitHub to Share with SparkFun

August 19, 2013

A simple step-by-step tutorial to help you download files from SparkFun's GitHub site, make changes, and share the changes with SparkFun.

I2C

July 8, 2013

An introduction to I2C, one of the main embedded communications protocols in use today.

Leap Motion Teardown

June 27, 2013

Let's see what's inside the amazing new Leap Motion input device!

Programming the pcDuino

March 12, 2013

With great power comes great complexity. This tutorial will teach you some of the basic concepts needed to get the most out of programming your pcDuino.

pcDuino Hookup Guide

March 8, 2013

pcDuino is SparkFun's single-board hardware-hacker based mini PC. It comes with Linux pre-installed, has all the hardware functionality of an Arduino Uno, and can be programmed almost as easily as an Arduino!

Light

February 7, 2013

Light is a useful tool for the electrical engineer. Understanding how light relates to electronics is a fundamental skill for many projects.

Connector Basics

January 18, 2013

Connectors are a major source of confusion for people just beginning electronics. The number of different options, terms, and names of connectors can make selecting one, or finding the one you need, daunting. This article will help you get a jump on the world of connectors.
  • There are examples with the library. For now, we wanted to focus on the core functionality that we feel most of our customers will use, which is the SimbleeForMobile library.

  • Should be fixed now. Sorry about that!

  • Not yet, although I’d imagine that’s a likely future upgrade.

  • You can do this, but it’s not recommended. You’ll need one low resistance (1-2 ohm) high power (1-2W) resistor per leg, to provide a resistive element allowing the strands to have different LED forward voltages.

    It’s best if the LEDs on all branches are the same; the more different the forward voltages of the strings of LEDs are, the worse the balancing is.

    When you do this, the drive current will be more or less evenly shared between strings.

  • You can hookup as many to one power supply as the supply can handle. They’re about 95% efficient, which is to say, power out (Iout * Vleds) ~= 0.95(VsupplyIin). Solve for Iin.

  • How do you know 20% light output corresponds to 1 count PWM?

    Light output behaves in a non-linear fashion; the output of this is linear, that is, the current varies from 0 to 350mA in equal steps as you go from 0 to 255. Here’s a StackExchange article about correcting for that.

  • I haven’t tried it; I’m curious as to whether it would work or not, though. I feel like it might do some weird stuff; the fact that the two (or more) devices wouldn’t be synchronized in frequency or in phase might mean that you’d get weird currents flowing in odd places.

    That said, if your lamp specifies 24W at 12V, it is almost certainly not a bare LED, but a lamp designed to be attached to a 12V power rail. If that’s the case, you don’t need a buck driver, just a 12V power supply.

  • Yes. They are, in fact, designed to be connected in this way.

  • Wow, that’s really nice! Have you recorded any video, yet?

  • I’m afraid I don’t, other than to suggest maybe adding subdirectories to the path variable?

    I’ll say this: I have only jre7 on my machine, and I’ve been able to run this SDK with no trouble. Although I haven’t tried in a few weeks.