Legacy Personal Blogs

Please Note:

This blog contains the legacy personal blog posts of our members, other than our Top Members whose content has been migrated into individual blogs in this area. Our new platform does not have personal blogs so this is how we have preserved the personal blog posts of our members from the Jive platform. No new posts will be permitted in this blog. Instead, if you wish to create blog content, please post it in the blog in the most appropriate topic area.

Disabling Touch in Raspbian for the Adafruit 2.4" PiTFT

andywest

I've been working on a Raspberry Pi-based handheld that requires a 2.4" screen, so I decided to try Adafruit's PiTFT LCD. This project doesn't require touch, and I started having weird issues with the resistive input that were bogging down the CPU an...
- 30 Apr 2018
Arduino: R-2R: Setting the Signal Amplitude

jc2048

I'm back again with the resistor DAC on an Arduino Uno as a simple audio generator. I'm not clear how I came to do so many blogs on it, but this is going to be the last one. Here's the latest sketch with commands for setting the output level as ...
- 30 Apr 2018
Arduino: R-2R; "A Sweep is as Lucky, as Lucky Can Be..."

jc2048

I'm back with the test sketch and I've implemented a frequency sweep. This starts at 20Hz andcontinuously changes the frequency until it arrives at 20kHz where it starts all over again.The sweep is linear because that was what was easy to do (normall...
- 26 Apr 2018
Smart Home: Party Light Teardown

djfraz

I thought I would take a short break from studying and teardown the party ball and laser. My apologies for my desk being a bit cluttered in the pictures. I do have a short video of the lights working and roughly in place, but the video upload bu...
- 25 Apr 2018
Arduino: R-2R: Setting the Output Frequency

jc2048

I've made a bit more progress. I now have my test code connected to the SCPI parser. That was very easy to do: I simply copied their generator example, took out the lines specific to the chip they were using, and adapted it slightly to calculate ...
- 25 Apr 2018
Arduino: R-2R: "Resistance is..."?

jc2048

Another diversion - I'm going all round the houses here. Who would have thought that there could be so much to a few simpleresistors arranged in a network? This time I'm playing with the simulator. When I did the hardware in a previous b...
- 24 Apr 2018
Arduino: R-2R: "We Interrupt This Programme..."

jc2048

More on the R-2R ladder as a DAC. This time some work on the firmware. What I'm doing here is the reverse of what happens when we digitize a signal; at regular intervals I have to come up withthe value for the waveform at that moment in time rat...
- 24 Apr 2018
An Updated MQTT Client Solution using C++ Templates on the Avnet NB-IoT Sensor Shield

james.flynn

There are several MQTT solutions available for many different platforms and languages, and when you go looking for a ready-made solution to use, you may end up at https://github.com/mqtt/mqtt.github.io/wiki/libraries which provides several solutions ...
- 24 Apr 2018
Tevo Upgrades - Dual Z Axis

powderjockey

Well, I've had the Tevo Tarantula for about 3 months and by rights, I'm behind most owners in doing upgrades to the "Spider". According the Facebook page, most owners are printing and purchasing upgrades for the printer right from the start. I have p...
- 24 Apr 2018
Arduino: R-2R: Buffer, Attenuate, and Filter

jc2048

I'm still fiddling around with the R-2R ladder as a DAC on an Arduino. This time some hardware. This isn't a project to be built, instead I'm experimenting with analogue stuff; you're looking overmy shoulder as I get some things ...
- 22 Apr 2018
Blinking wearable

jeanmatthieud

I had to build a blinking device as a Proof of Value (PoV).The concept is quite simple:The device should blink in green during 2 hours,After two hours, the device should blink in red,After two more hours, the device should stop blinking,The time coun...
- 18 Apr 2018
Tevo Tarantula In Action

powderjockey

I have a short video of the "Spider" as it is referred to on the internet. The tail end of the video is a couple of still images of the finished product. I could stay up to see the printing all the way thru. https://www.youtube.com/watch?...
- 18 Apr 2018
A Java class to read ultrasonic sensor readings [raspberry pi] [HC-SR04]

chandima

I am working on an embedded systems project these days which the core program is written in java to work on a raspberry pi 3 model b in raspbian os. We needed to connect few ultrasonic sensors for that device so i have written a java class to interfa...
- 17 Apr 2018
Are you looking for your new design to contain customised components or be housed within a milled and marked enclosure?

PhoenixContactUK

It may be a simple question however the decision of whether you use standard off the shelf products or have the components or enclosures modified in some way can seem like a daunting task. Some of the considerations you need to make are will yo...
- 16 Apr 2018
Tevo Tarantula i3 Prusa Printer – Printing – Part 3

powderjockey

So, you're all setup, the printer is built and the electrical is wired and you want to print some. The itch is really getting to you. But what does one print out and where does one get files to print. One of the best places for getting files to print...
- 16 Apr 2018
Arduino: R-2R: Sine On You Crazy Diamond

jc2048

Part one is here:https://www.element14.com/community/people/jc2048/blog/2018/04/12/arduino-r-2r-experiment I was going to do some hardware next but got sidetracked into playing with software instead. Here's a very well-known waveform being ...
- 13 Apr 2018
Smart Home Plans

djfraz

After posting about my Smart Home Movie Lighting I want to make my home smarter, or at least more interactive. I wanted to post a Short plan for what I want to install and make for use with my Openhab Server, which is currently running on a Rasp...
- 13 Apr 2018
Arduino: R-2R Experiment

jc2048

R-2R sounds like it might be a robot from the Star Wars universe (a ladder robot, maybe?),but in electronics it's the name of a resistor network that can be used to make a DAC(digital-to-analogue converter). I'm going to try doing just that w...
- 12 Apr 2018
Tevo Tarantula i3 Prusa Printer - Wires - Part 2

powderjockey

So the printer is built and all of the carriages move nice and smoothly. Now there is a wad of wires, switches and electrical parts that need to be all connected in order to make this printer, print. If you remember at the tail end of Part 1, I...
- 12 Apr 2018
Fluke PRV240FS Proving Unit Battery Consumption

three-phase

I purchased the PRV240FS proving unit around seven weeks ago now to go with the Fluke T110 voltage tester that replaced my old Kewtech unit that decided to exit the tool bag in two halves detailed in a previous blog; My new voltage probe has arr...
- 11 Apr 2018
Check out 'Storage Insights #1 - Why Not All SD Cards are Created Equal' -element14 Community

delkinindustrial

Storage Insights #1 - Why Not All SD Cards are Created Equal
- 11 Apr 2018
Sigfox sensor node

jeanmatthieud

Hi ! This is my first blog post on Element14 community.I'm french, and I discovered electronic few years ago. I try to share what I'm discovering every day with my blog. I recently created a Sigfox node. This node gets some informations fro...
- 11 Apr 2018
NTSC/PAL Video Display Shield

wolfgangfriedrich

Open ArduinoEnter Your Project for a chance to win a grand prize for the most innovative use of Arduino or a $200 shopping cart! The Birthday Special: Arduino Projects for Arduino Day!Back to The Project14 homepage Project14 Home Monthly Themes Monthly...
- 9 Apr 2018
AMS101 Evaluation Card IP (AD5065 Dual DAC)

dhmarinov

AD5065 Dual DAC AXI Introduction This article describes the implementation of the AD5065_Dual_DAC_AXI IP and the motivation behind it. The author of this t...
- 9 Apr 2018
Tevo Tarantula Prusa i3 Printer - Build - Part 1

powderjockey

I'm going to try and give the Tevo Tarantula Prusa i3 Printer a bit of a review. I was kind of looking at getting a 3D printer, but the price of them seemed out of reach. Knowing nothing about 3D printers I would read some posts around the Inte...
- 7 Apr 2018