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Nico teWinkel's Blog

47 posts
ntewinkel

3.3v USB adapter

Posted by ntewinkel Top Member Feb 13, 2018
I've been working on putting an old ESP-01 module to use as a remote sensor, and it requires 3.3v power. It's a very barebones board, so that power needs to be supplied to it somehow.   For the final project I want it to be battery powered, but in the meantime I wanted to just be able to easily hook it up to a cell phone charger.   So I thought I'd be clever and wire up an AMS1117-3.3 to a small micro-usb adapter board I had bought a while back. Oh and did I mention I only have the ...
Hello all!   I just received a nice TI Wireless Bluetooth Digital Multimeter to try out, courtesy of Texas Instruments and Element14 - very cool!   This is what was in the box (so hey, this is also, sort of, an unboxing blog post!). It came with a small bit of paperwork on how to use it...   Here's a closer picture of the unit. I've combined two pictures, back and front, so you can see what it looks like: As with any multimeter, it still needs a couple of test leads conne ...
You knew it had to happen one day...   I set up my Raspberry Pi (2) to play videos for my cats     -Nico ...
ntewinkel

Kitty Cam update

Posted by ntewinkel Top Member Feb 5, 2016
Further to the Kitty Cam , I now have it all tucked away into one convenient tin (a Thule tin that came with my roof rack). One big advantage of this setup is that none of the lights show, making it much less suspicious looking to any critter that might stop by.     I had to use elastics because the wires that plug onto the RPi pins have connectors that are just a little too tall to allow the lid to snap shut.   That contraption at the top is a makeshift USB extender to get t ...
ntewinkel

Kitty Cam

Posted by ntewinkel Top Member Jan 24, 2016
I’m getting closer to finishing the Kitty Cam.   This is a project I started because a couple of people in my area have lost their kitties, and are hoping to catch them again to bring them home so they can give the kitties the pampered lives they deserve (that's the birthright of all kitties, of course!).   I had been setting out game cameras around the yard for other reasons, which is why I refer to them as "critter cams" because I use them to spy on the critters that freque ...
Here is a video of Charlie trying to work the cat treat dispenser...   Will he press the button?   ...
I finished* the cat treat dispenser today!   Charlie gave it the once over to see how it works.   Here he is demonstrating the part he's most impressed with (i.e., the food)   Click the mouse button to get treats   So far he just sits there waiting for me to press the magic button, but he's getting very close to pressing it himself!   Cheers, -Nico   *Finished means it works, but I'll most likely be making improvements and modifications over time ...
Charlie finds a use for the AREXX robot arm     (ps, sorry for the poor quality - in my hurry I used the video capture of the text messaging app. Hopefully he'll pose for a better video in the future) ...
Hi All,   I thought I'd share a video of what is included in the AREXX Robot Arm kit: 28-13530 - Buy AREXX 28-13530 Online at Newark element14 There is also a "pro" version available, which is bigger and is fully made of metal, where this mini version uses some plastic in the arm.   For more information you can also visit the manufacturer's website: AREXX ENGINEERING or directly to the robot arm section: ROBOT ARM DOCUMENTATION & SOFTWARE WEBSITE   ...
A while ago I received a Raspberry Pi 2 model B - the new and improved faster version of the Raspberry Pi. I already had a Raspberry Pi B+, so it was neat to be able to compare the two.   Unboxing Here are some first impression pictures: The Pi2 (on the right) has a box that's thicker, to accommodate the new "manual", which is more or less just a whole lot of legal stuff in a whole lot of languages. I'd prefer if they had just kept that out of it and saved a few million trees instead. ...
I've been working on a data logging system for my greenhouse - basically just a way of tracking soil moisture, sunlight, rain barrel water level, and of course temperature inside and outside of the greenhouse.   I built most of it for Arduino, as I have several of them, and only one KL25z - and I have other plans for the KL25z board   But I thought I'd try the TMP36 temperature sensor with the KL25z, as the Arduino has a couple of limitations that are bugging me for the project: * ...
ntewinkel

Mbed.org on phones.

Posted by ntewinkel Top Member Jun 1, 2013
In my previous blog post I mentioned this URL: http://mbed.org/handbook/Guide-to-mbed-Compiler-on-tablet-device That website mentions the use of iOS and Android tablets to use with MBed. My iPad worked well for that, and even powers my FRM-KL25z board (using the Apple usb adapter), but sadly it doesn't let install programs onto the board, as the iPad doesn't recognize it as a USB drive.   So I bought a USB cable online to connect the FRDM board to my Android phone.   I received the ...
This is interesting: http://mbed.org/handbook/Guide-to-mbed-Compiler-on-tablet-device   And it makes sense because all you need is a browser.   I tried it on my iPad 2, and it's actually not too bad for programming on. My wife also happened to have an adapter that she bought to use the iPad with her camera, which allows a USB connection from the iPad to a camera. I tried it with the FRDM-KL25z board, and it powers it up nicely! Unfortunately, iOS doesn't set up the drive for use, s ...
For the second circuit in my quest to compare Arduino to FRDM/mbed, I decided to try CIRC-04 (Servo) of the Oomlout tutorial: http://www.oomlout.com/oom.php/products/ardx/circ-04   This one is also quite easy, as it's been done before! I was able to find something similar in the mbed.org Cookbook, under Motors and Actuators: http://mbed.org/cookbook/Servo   I then simply clicked the Import button (top right above the sample code) And viola! I have the complete program in my works ...
For the longest time, Arduino has been my favourite development environment simply because it is so easy to use.   Now, mbed.org and the FRDM-KL25z board are looking like they might become my new favourite.   The reason for that is based on my hobby needs: the board is very affordable and with mbed.org is very easy to setup and program. The fact that it's also faster and more capable and has a few extra options (LEDs and touch slider) are a nice bonus.   Those who may have read ...