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Initial Ideas Over 3 years ago I really wanted a single RGB LED controlled by a microcontroller. I didn't want to add LEDs to a microcontroller, solder them, chain them, wire them up! I just wanted an RGB LED connected a microcontroller. And, as far ...

As I explained in the How Hard Could It Be? video, the first objective in getting sound out of a record player is amplifying the phono-level signal from the tonearm (about 5mV) up to line-level (1V). This pre-amplifier stage uses a low-noise operatio...

The Califone 1400 Series record players have always held a special place in my heart because they were my first experience with phonographs. This particular model that I've been working on for Project Califone happens to come from the school syst...

The Califone 1400 series record players were built like tanks: able to be thrown across a classroom, climbed upon by kindergartners, and still keep playing! Let's take a peak inside and see just how it was built! https://youtu.be/mGkZpxZJ1Ls The big ...

If, like me, you're of a certain age and grew up in the American educational system, you'll probably recognize this beast: A Califone 1403k "stereo compatible" portable phonograph. Built from the 1960s until the early 1990s, this ma...

In the Mini IIe project, I need video output. The Rev 1 shown in the project video relied on the analog video circuit from the IIgs. So I copied and pasted it from the IIgs schematic. (Well, in KiCad 5, you had to copy the file and then edit the sche...

The original name for the Apple IIgs was Cortland. This type of apple has a deeper meaning to the nature of the IIgs.

Traditionally, a Geiger counter like the CDV-700 series is a completely analog device--the device output is driven entirely by the analog electronics. Electrical pulses passing through the Geiger-Müller tube during ionizing events are run throu...

As discussed previously, a Geiger counter is a fairly simple circuit that takes a high voltage and runs it through the switch-like Geiger-Müller tube and into the meter mechanism. To build a Geiger counter, we need to look at three basic parts: ...

If there is one piece of technology that is uniquely associated with the Cold War aesthetic (apart from the atomic bomb itself), it is the handheld radiation survey meter depicted in civil defense and popular fiction of the era. The survey meter--typ...

Hi all!I'm currently working on an element14 presents project, to make a electronics/engineers fidget cube. What do you think, good idea? My original aim was to make a 1" cube with small circuits on each side, but fairly quickly I realised this was g...

Greetings Earthicans! For this write up, I present my project for "Build Inside the Box." This contest was designed to give various makers a "random assortment of components and have them create a project with them. This is somewhat in the style...

Hi, everybody! First of all, thanks a lot to the organisers who gave me the opportunity to participate for free!Second, I failed to get it done it time. The box was delivered two weeks ago and it coincided with my exam session in college (actual...

Welcome to my build log for the Build Inside the Box Challenge! This is my first blog/writeup/build on here, so if you have any feedback, please leave a comment!Here are the contents of The Box:- Arduino MKR Zero – Neat little development board, uses...

Thank you Christopher Stanton and element14 for the opportunity to Build Inside The Box!  It was great fun. Getting the box was a moment of great joy and great panic as the reality of "I've got to build something!" really hits home.  I...

I so want to start showing off my talent to create. And my skills being a maker.

Greetings fellow Earthlings!In this living blog post, I will be documenting the build of my project for Build Inside the Box. See the section headers for the updates as they come. I'm planning to leave any previously-posted stuff alone; otherwise mak...

Probably that will get tiresome after a while, but dang that was a good movie. And whoo boy after starting looking, I think I might know more about what to do with a severed head than this  Mostly it seems that the MKR Zero uses different l...

After a brief departure onto a couple of other projects, I'm back to complete Project Mego--my 2XL-Google Assistant conversion--and I needed to come up with a way to change the voice from one of the stock Assistant voices to more of a robotic sou...

One of the first challenges with restoring the 2XL at the heart of Project Mego is repairing and restoring the malfunctioning 8-track player mechanism in his belly. This particular unit has a few broken pieces and a misaligned head, so I'll point...

This segment was cut from the completed project video, but I thought it interesting to have a look inside one of these cheapo voice changer toys that retails for way more than it should. I'm certainly nota531016, but I like to pretend every so of...

After studying the Velleman MK171 Voice Changer kit that I assembled in a previous video, I wanted to play around with some elements of the circuit to see if I could customize it. In this video, I'll walk through the circuit schematic and explain how...

When you're building a project that has multiple modules with different voltage requirements, you may need to build a 5V buck converter. This video walks through the process to build a converter that will take up to 40V input down to 5V at up to 5A, ...

****EPISODE TITLE****element14 presents  |  AirborneSurfer's VCP Profile |  Project Videos Arduino sketch://Project ColorTyme //Hexadecimal Color Code Clock //CC-BY-SA Matthew Eargle //element14 Presents http://element14.com/pres...

****EPISODE TITLE****element14 presents  |  AirborneSurfer's VCP Profile |  Project Videos In a previous project, we looked at how to attach a TFT LCD screen to a Raspberry Pi to build a small-form-factor project. But what if you...