e14 presents blogs

OverPowering my Vacuum Cleaner so that I do not have to throw it away

GreatScottLab — Thu, 25 May 2023 12:01:32 GMT

Everyone knows the problem. Electronics get older, slower and less powerful. That also happened to my old vacuum cleaner. But instead of immediately throwing it away, I wanted to try to upgrade it. So in this video you can see my journey of making my...(read more)

Arduino, Raspberry Pi, or ??? I'm Hacking Philips Hue Lights and I need your help!

TechnoChic — Wed, 01 Mar 2023 17:03:18 GMT

Hi! It's Natasha. I'm working on my next project for Element14 Presents which involves hacking the Philips Hue Lighting System. I need your help to determine which path I should take - please watch the video for the details of the project: http...(read more)

Win a Massive Raspberry Pi to Hang on Your Wall! (Winners Announced!)

tariq.ahmad — Tue, 16 Aug 2022 15:42:00 GMT

This contest is now closed! Congratulations to norman you are the winner of the Pi Massive! In the Comments Below: Share a Photo of Where You Intend to Hang the PiMassive! Let Us Know Why You Deserve to Own the Pi Massive! Wesl...(read more)

Introducing Solas and the journey of creating my own RGB LED Board

lorrainbow — Tue, 01 Mar 2022 23:47:00 GMT

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 ...(read more)

Single Stage, Single Channel Phono Preamp With Power Supply Schematic

airbornesurfer — Wed, 16 Feb 2022 20:11:00 GMT

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...(read more)

My Califone Story (Or: Why Teachers Headcount Before Leaving The Classroom)

airbornesurfer — Thu, 13 Jan 2022 01:15:00 GMT

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...(read more)

Califone 1430K Record Player Teardown

airbornesurfer — Mon, 10 Jan 2022 06:22:00 GMT

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 ...(read more)

Project Califone: Renovating and Rewiring a Califone 1430k Portable Phonograph

airbornesurfer — Mon, 10 Jan 2022 01:39:00 GMT

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...(read more)

Converting Apple II video bitstream into HDMI (with an RP2040?)

baldengineer — Sun, 09 Jan 2022 19:38:00 GMT

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...(read more)

Apple IIgs started life named "Cortland," what does it mean and why did it change?

baldengineer — Wed, 05 Jan 2022 18:41:00 GMT

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

Using An Arduino To Drive A Geiger Counter

airbornesurfer — Sat, 04 Dec 2021 04:23:00 GMT

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...(read more)

A Homebrew Geiger Counter Circuit

airbornesurfer — Sat, 04 Dec 2021 02:22:00 GMT

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: ...(read more)

How Does A Geiger Counter Work?

airbornesurfer — Thu, 25 Nov 2021 05:21:00 GMT

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...(read more)

Small circuits - Ideas needed for my Fidget Cube!

hifromkatie — Mon, 25 Oct 2021 15:19:00 GMT

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...(read more)

E14 Presents - Ball on a Beam - Build Inside the Box 2021

aspork42 — Sat, 08 May 2021 07:49:10 GMT

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...(read more)