Member Since: February 12, 2015

Country: United States

Now I'll use these 60 USB supplies to see if I can weld!

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Here I've got 60 USB charger power supplies wired in parallel, just to see what happens.

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This post explores how to use the power control features of the Battery Babysitter to make a product with the features we expect from portable embedded electronics.

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Our next installment in the Synth Saga fits in the palm of your hand!

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Looking to emulate modular synthesizers with the Teensy Audio platform? Read on!

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This Enginursday tests a 7805 regulator with various heat sinks.

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Here's what the combat part of AVC will look like

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Watch and learn: a video about the design process for a mobile camera

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The process of using open-source designs to get to a final product, featuring KiCad, PJRC, and Advanced Circuits.

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A look inside some common power supplies.

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This post highlights my method of creating the control system for our AVC battle arena.

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A look at implementing the Arduino blink.ino sketch as an explicit state machine. To further explore state machines, an alarm clock state diagram is drawn and implemented.

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CCS811 Air Quality Breakout Hookup Guide

April 27, 2017

This tutorial shows you how to get data from a CCS811 breakout board with the I2C interface.

Ardumoto Kit Hookup Guide

April 14, 2017

Learn how to assemble and drive DC motors using the v2.0 Ardumoto Shield.

TeensyView Hookup Guide

March 16, 2017

A guide to using the TeensyView OLED board to display text and graphics.

LIS3DH Hookup Guide

December 29, 2016

A guide to connecting the LIS3DH to a microcontroller and using the Arduino library.

Proto Pedal Chassis Hookup Guide

September 22, 2016

Prepare the Proto Pedal Chassis by drilling holes for controls and painting it.

Beefcake Relay Control Hookup Guide

June 2, 2016

This is a guide for assembling and basic use of the Beefcake Relay Control board

Shapeoko Assembly Guide

April 21, 2016

A guide for attaching the Stepoko Add-on kit to a Shapeoko Mechanical kit.

Raspberry Pi 3 Starter Kit Hookup Guide

April 11, 2016

Guide for getting going with the Raspberry Pi 3 starter kit.

RedStick Hookup Guide

January 28, 2016

Learn about the SparkFun RedStick, a USB thumb drive-sized Arduino-compatible development platform.

Shapeoko Coaster Project

November 20, 2015

A step-by-step guide to cutting and engraving a coaster with the Shapeoko.

Raspberry Pi 2 Starter Kit Hookup Guide

October 29, 2015

Guide for getting going with the Raspberry Pi 2 starter kit

Raspberry gPIo

October 29, 2015

How to use either Python or C++ to drive the I/O lines on a Raspberry Pi.

SparkFun BME280 Breakout Hookup Guide

October 22, 2015

A guide for connecting the BEM280 sensor to a microcontroller, and for using the Sparkfun Arduino library.

SparkFun Line Follower Array Hookup Guide

October 15, 2015

Learn how to connect the RedBot Line Following Sensor Bar to an arduino type microcontroller. Use the example sketches to read data from the bar, and try out a simple line following algorithm.

LSM6DS3 Breakout Hookup Guide

August 13, 2015

A hookup guide for the LSM6DS3, which features a 3-axis accelerometer, 3-axis gyroscope, and FIFO buffer.

Getting Started with the Teensy

June 18, 2015

Basic intro to the Teensy line of products, with soldering and programming suggestions.

Teensy XBee Adapter Hookup Guide

June 18, 2015

Getting started with the Teensy 3.1 and XBee. Establishing a serial link.
  • 1.2 x 2.45 inch base, 1.0 inch height

  • The static tests I did while designing shows the following steady state limits at rated voltage:

    • 1.1A for open air, no heat sink, 90°C rise
    • 1.25A for open air, TO-220 heat sink applied, 90°C rise

    I’ll see about changing the description to say ‘peak’ rather than ‘up to’. I agree that’s a little misleading, but most people aren’t trying to regulate 160W of drive continuously! I do have some plans to make that product in the future though.

    If you want the full current capacity at steady state, you’ll have to remove the heat from the IC by way of a heatsink or by forcing air (better yet, do both!) Even a light breeze helps tremendously.

    I get different results with the 100mA current test. I drive 113mA/channel and get 35°C with an 8V source, or 40°C with the full 18V source (ambient 27°C, laying flat on desk). Are you running yours from 40V for your 60° results?

  • Thanks! It’s super useful. Check out the hookup guide – there are some pictures of the assembly. The diodes also have numbers written on them as well, 1N4148 would be marked:



  • Hey, I wanted to put a few more thoughts in here. If you’re the type that ends up with random psoc dev kits, many of them can be used to flash and for debugging. For instance, I use a CY8CKIT-042-BLE kit because I didn’t have a miniprog3 handy.

    To recompile from the github repository, use cypress PSoC creator 3.3 and set the build to “release” (Code won’t fit with all the debug stuff), and you should be able to build the entire project.

  • I’d like to try that! Ran out of time on this one though. I was thinking, I have 6 banks that can do 20A each, so why not 30V and 20A? That sounds about like a welder. And then maybe I could get that pickle luminescent too

  • Don’t worry, I saved it for you. It’s on your desk

  • Thanks! But this is 2017 so it’s actually a digital coffee ring that has white sent to transparency, which was overlaid on the original. ;)

  • The ANSI Y32.2 is easy to find, thanks! I actually prefer the 1975 version, as the symbols are not space over pages and pages. I’ll keep this one around!

    I’m not sure of the legality either, but it floods the google results. I wish these standards were made with the intent to be open source to aid humanity!

  • Low was indeed intended to be high, I have fixed it. Thanks!

    The button thing is an interesting point. I’ve been drawing them that way for years and no one has said anything, but sure enough the T is supposed to go the other way, or, I should have just drawn it as a line.

  • To be honest, that one gets me too sometimes.

    OK, I think I got it a little clearer in the post now.