Posts Tagged 'Hardware'

The ESR electronics Tricorder: Update

In case anyone is wondering, the ESR project isn’t dead, I’m just waiting for some small OLED displays to show up. I ordered these a while back (in December), and they have yet to arrive. The plan is to use some of the empty space on the front panel next to the display already slated to go there. Here’s what it looks like:

oled_disp_crop

It has a 128 x 32 display space with an I2C interface. You can find this OLED display on eBay, and they go for around $4 each.

It was originally slated to arrive by the 3rd of January, and the tracking info says it’s supposed to show up today, so we’ll see.

 

Distributed Control and Sensing with USB

Distributed I/O systems are a key element in many industrial processing settings, distributed environmental controls for buildings of all sizes, vehicles large and small, scientific research settings like large telescopes and particle accelerators, and in laboratories with equipment connected to a central data collection and processing system. Multiple microcontrollers units (MCUs) provide the sensing and control to automate systems for improved efficiency, better data collection, and enhanced safety. Without MCUs, modern life as we know it could not exist.

There are multiple ways to connect an MCU-based device to a host computer system, ranging from industrial serial interface protocols like RS-485, CAN, or ProfiBus, to conventional Ethernet or wireless protocols. USB is also a possibility, but it seems to be largely confined to small-scale and consumer type applications. But does USB have what it takes to be used for applications other than just connecting a printer to your PC? Can it be used to collect data from an automated test system, or control the various components in an industrial process?

Continue reading ‘Distributed Control and Sensing with USB’

1000 mW Laser Engraver

A while back I bought an Neje DK-8-KZ 1W laser engraver. It was on sale, and I was curious about it. At only 1W (1000 mW) I knew I wasn’t going to be cutting anything except paper with it, but I was looking for another way to create engraved labeling on plastic enclosures. Well, it can do that, with some limitations, and it works pretty well on wood, but my biggest aggravation has been just getting it to actually put the engraving where I want it to go, and also deal with the automatic scaling it employs.

Continue reading ‘1000 mW Laser Engraver’

Clever Arduino Case

One of the challenges that seem to keep coming up when working with an Arduino is where to put it so that it won’t get banged up on the workbench or tossed off the dining room table to make space for dinner. I’ve written about using wood, and my books give examples of various types of enclosures (everything from PVC tubing to pro-grade test instrument enclosures), but what other options are available? Is there an off-the-shelf solution? Turns out there is, if you have an R2 or R3 type Uno (or Duemilanove), and best of all it’s inexpensive.

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New series: Arduino Test Equipment

The ESR electronics Tricorder, Part 1

In this article I describe the beginnings of a device that I like to think of as a Tricorder for electronics. This is the first of a three part series in what will (hopefully) be the start of a series of articles that describe ways to use Arduino boards and AVR microcontrollers to build useful, low-cost test, measurement, and control devices.

For additional details and definitions be sure to check out my books “Practical Electronics: Components and Techniques” and “Arduino: A Technical Reference“. Both are available from O’Reilly, Amazon, Barnes and Noble, and numerous other places where fine books are sold.

Continue reading ‘New series: Arduino Test Equipment’

C.H.I.P: The VGA test setup

Here are some images of the CHIP test setup I cobbled together. It’s not pretty, but that’s not important for right now. It works, and it demonstrates one way to assemble things and get a working single-board Linux system up and running. Continue reading ‘C.H.I.P: The VGA test setup’

More CHIP computer notes

After getting the VGA “DIP” add-on PCB installed and running I’ve been playing around with the CHIP a bit more. Between the day job and a couple of books in progress I don’t have a whole lot of spare time, but I did find out a few interesting things. Continue reading ‘More CHIP computer notes’


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Little Buddy

An awesome little friend

Jordi the Sheltie passed away in 2008 at the ripe old age of 14. He was the most awesome dog I've ever known.