Storj Storage Node Docker-Compose file

Storj V3 is now in BETA and recruiting Storage Node operators. Since V3 of Storj, Docker is used exclusively to wrap up creating a new Storage Node into a simple, manageable container. You’ll need to see the official docs for creating your identity certificates, but when it comes to creating your docker environment it couldn’t

Apache Traffic Server (ATS) Returning 403 For DELETE HTTP Requests

Here is a quick snippet which solves an issue I ran into today. I’ve recently set up Apache Traffic Server to reverse proxy requests to various Docker containers. It all works great and runs itself in Docker. One thing, however, with a default install of Apache Traffic Server is that it doesn’t allow DELETE HTTP

Mysql Data Types and Sizes for String/ Text

MySQL or MariaDB has several data types for handling text-based characters. There are several data types for handling smaller strings such as CHAR and VARCHAR data types. For larger text-based strings there are BLOB based data types such as TEXT. It’s worth noting at this point that the below-quoted sizes do not necessarily represent the

Docker Compose yml for Gitlab and Gitlab Runner

Create a new directory and save the above file inside it as docker-compose.yml. You’ll need to replace the field hostname with the external URL that you’ll use to access your Gitlab instance. Run docker-compose up -d to fetch the images from the docker hub and create your Gitlab instance. You’ll be able to access Gitlab

Dockerfile for Apache Traffic Server (ATS)

Apache Traffic Server is an enterprise-grade proxy and caching server initially developed by Yahoo, then later made open source and managed by the Apache Foundation. The below code is a Dockerfile that will download and build ATS on the latest Ubuntu base image. Currently, we’re using Apache Traffic Server version 8.0.5, but if you’d like

Install Docker-Compose

Docker-compose is a utility used to create and manage multiple Docker containers together to form a service. It relies on Docker being installed on the same host so make sure that Docker is installed on your system beforehand. Once you have docker installed and tested you’re ready to begin. It’s worth noting that docker-compose is

How to test your Docker install is working

Testing Docker, thankfully is one of the easiest things you can do – something you’d expect from Docker. With a simple one-liner you can test if your docker instance can reach the central repository, download images and run the image on the local machine. If you haven’t installed Docker yet, see the installing Docker blog

Docker Compose yml for WordPress

Create a new directory and save the above file inside it as docker-compose.yml Run docker-compose up -d to fetch the images from the docker hub and create your wordpress instance. You’ll be able to access wordpress from a browser on port 8000.

LEAP now has its own feed

For a couple of years I have been using this blog to post snippets about new projects in the Little Electronics & Arduino Projects (LEAP) GitHub repo.

This was mainly a way to have a project link I could use as link bait;-) … but it was also a chore I could do without!

A little while back I revised the Jekyll static web site generator that runs over the LEAP repo and is responsible (more...)

LEAP#465 Mr BiJuT

Mr BiJuT is what I’m calling my freeform realisation of a simple NPN/PNP transistor testing circuit.

This is a nifty little design that I found in the Radio and Electronics Cookbook. It is one of those circuits that is the height of simplicity but is also quite tricky in it’s own way! Whether you immediately “get” how it works depends very much on how you draw the schematic;-)

As always, all notes, schematics and code (more...)

LEAP#461 The Goblin

I remember lusting after an Ibanez Tube Screamer back in the day - they really were the stuff of legend. The most famous is perhaps the TS-808. After researching the original circuit and examining how it works in detail. I decided to build one with only a few modifications to the original circuit. I’m calling it The Goblin, owing to the custom stippled-green paint job I gave the 1590B enclosure.

As always, all notes, schematics (more...)

LEAP#460 The CANary

Wilf’s Bird is a pretty famous “bird chirp” sound effect by Wilf Rigter. I last saw it used in Kelly Heaton’s wonderful bird sculpture, a Hackaday Circuit Sculpture contest winner.

The CANary is my little experiment with the sound effect.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub


LEAP#456 Pease-out Audio Voltage Probe

The Boldport Pease-out is another tribute to Bob Pease and the classic LM331. As the last of the “classic series” monthly projects, it fittingly takes us full circle to compare and contrast with first project - “Pease”.

the Boldport Club continues - just not at the harrowing pace of 1 a month for the past few years (I seriously don’t know how Saar does it!).

The standard circuit in this kit demonstrates a stable (more...)

LEAP#451 Arc Lighter

A “High Voltage Arc Kit” perhaps attracts the kind of person liable to make it go up in smoke, which is probably why this kit ships with redundant parts.

The circuit is an interesting demonstration of a step-up transformer using a feedback winding to control the main power circuit. It is the same circuit used in commercial “plasma lighters”, confirmed by another great teardown by bigclivedotcom.

As always, all notes, schematics and code are in (more...)

LEAP#449 Parrot Sound Effects

The Parrot is a reproduction of a “bird chirp” circuit I found referenced in background research materials for Kelly Heaton’s amazing bird that was one of the Hackaday Circuit Sculpture contest winners.

This circuit is an interesting combination of two LC elements - one modulating the other - around a single transistor.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub


Here’s a clip from the (more...)

LEAP#447 Measuring Capacitance with Digital Logic

Capaci-meter is a Boldport remix of a classic capacitance measurement circuit designed in high school by Jez Siddons of Peak Electronic Design.

The device takes a very interesting approach - rather than trying to measure the actual capacitance or charge time, it uses a derivitive function (the capacitor’s effect on the frequency of a 555 timer) to infer capacitance.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo (more...)

LEAP#446 RGB Joule Thief Night Light

I recently got hold of some 5mm RGB Flashing LEDs from a seller on aliexpress - some slow and fast flashing varieties just out of curiosity. Here I’ve put one the slow-flash kind in a “night light” circuit.

I decided to power from a little 1.5V CR1216 coin cell. To boost the voltage sufficient to power the LED, I’ve attached a toroidal joule thief circuit. The oscillating voltage produced by the joule thief is (more...)

LEAP#442 Boldport ResPot

As any good electronics hobbyist must have done, I’ve already built a decade programmable resistor box - see LEAP#414 - but this is one with the Boldport twist. Yes, real pots.

A decade box is an old-fashioned bit of test equipment, allowing an arbitrary resistance to be dialed up to order.

As always, all notes, schematics and code are in the Little Electronics & Arduino Projects repo on GitHub


rclone Systemd startup mount script

rclone Rclone is a command line utility used for reading and writing to almost any type of cloud or remote storage. From Google Drive to Ceph, rclone supports almost any cloud-based remote storage platform you can think of. You can perform upload, download or synchronisation operations between local storage and remote cloud storage, or between remote storage

gitignore file for Go Projects

This is a gitignore file for a Go project to ensure temporary files and build files are not added to git repository commits. [crayon-5bbdc2270ee85958079321/]