Electronics

Review: Adjustable 30V/10A DC Power Supply

I recently received the LongWei 30V/10A (Model: LW-K2010D) power supply from to review. Full disclosure - it was sent to free for this review. That said, I'm transparent about my views on things and don't sugarcoat. The below review is my first impression of this unit doing some basic validation of it's functions. In the coming months I'll drop back in and update as I get more experience with this PS. The review is broken…
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3D Printing

3D Print: Electronics Soldering 3rd Hand

After years using my reliable PanaVise, it was time to step it up with some extra help for soldering and electronics work.  I had this idea over a year ago, and pick-up some 3rd hand arms. They then sat on my   Now that the weather is cooling down, there's more time for hobbies.   That, and my eyes are not what they used to be, so this has become somewhat of a necessity.   Given MCUs…
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3D Printing

How To: TFT LCD with TouchUI on Raspberry Pi OctoPi Rig

I recently ventured into adding a " TFT to my LulzBot Mini.  I already have OctoPrint running via all my mobile devices, but there are times (usually during filament failure events) I need to directly control the printer (heat the filament, move axis motors etc).  After 3 painful days of messing around withe different tutorials, I found failure.  Well, I finally figured it out and it works dammit!  I haven't found a single source that has…
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3D Printing

USB Dial

This is another one of those "did it because I can" projects.  It's a USB dial that uses a Teensy Arduino unit at it's core and allows me to emulate my mouse.  I use TinkerCAD avidly to design my 3D printed models.   I wanted to have both this and my mouse at the same time.  The mouse would be used for some activities ( object selection/rotation/editing) while the dial would fill in to perform rotate/zoom in/out…
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HiTech HS-225BB LEGO Servo Mate

I'm looking at alternate steering options for BluCrawler as the LEGO PF servo motor doesn't cut it, and I'm not satisfied with other LEGO-based approaches I've tried.  So, I'm headed into unconventional territory that may cause my AFOL brethren to shiver.   I'm looking at integrating a HiTech HS-225BB Servo to manage steering.  If it works, I'll add one to the front and rear to give me the throw I need for a tight turning radius as well…
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Arduino

BTBox – LEGO Power Functions Bluetooth Controller

I've been on a bit of a LEGO Technic/Mindstorms hiatus for a while - ok, it's been 7 years!   I have an I've been spending much of my hobby time making my own DIY projects / IoT stuff all while mastering Arduino.   That changed a few weeks back when I came across THIS.  I've been thinking of getting an RC crawler for some time, but it struck me that I have 95% of the…
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Arduino

BluCrawler – LEGO Rock Crawler with BTBox Bluetooth Controller

First I want to give a shout-out (and credit) to PunkTacoNYC as BluCrawler is based off his Chilli Crawler - this is his creation. I'm  just taking it down another path.     You can also find published instructions if you want to build it yourself.  For some time, I wanted to get an RC crawler, but they can be $$$.  When I came across PunkTacoNYC's Chilli Crawler, that was I figured I had 90% of the…
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Electronics

WiFi Bot Control – Using NodeMCU (ESP8266)

WiFi Bot Control was built back before the ESP8266 came out, so WiFi options were limited and the ability to directly stream data over WiFi to the same MCU that controls a robot was next to impossible.  That changed with the intro of the ESP8266.  I'm going to show you how to streamline WiFi Bot Control and remove the need for a separate webserver.  We'll also look at options to streamline the IP camera connection.…
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Arduino

Nextion TFT LCD – Why you need one!

I'll start this by stating that I don't work for iTead, and nor am I getting any sort of   I just really like this TFT LCD.  I stumbled upon the Nextion (which is a slick easy-to-use TFT LCD with a HMI editor) when they had their first crowdfunding campaign a year or so ago.   I ignored it as there was not a lot of documentation, and frankly, I really didn't understand the concept of…
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