my recent reads..

cracking the static site SSL challenge with netlify

For the last year or so I’ve been running this blog on Github with Jekyll and Github Pages. That’s nice and easy, but the lack of SSL support for custom domains has remained stubbornly over-the-horizon.

I’m glad I tweeted my wish! With a nudge from @spencerbgibb I got to try out netlify.

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… and it is the real deal! I’ve just ported half a dozen sites from Github Pages, now all with automatically-provisioned SSL from LetsEncrypt

I’m really impressed with the static-site publishing system they’ve put together. It works just like Github Pages .. but better. Seriously, all I had to do was:

  • Sign-in/sign-up
  • Choose to add a site from one of my repos (automated with GitHub OAuth)
  • Build requirements for most of these sites were auto-detected (I had a to tweak a couple where the site target was ambiguous)
  • …and the site is deployed
  • Next, add a custom domain name
  • Switch the CNAME records

Then the only time consuming bit … waiting for DNS propagation!

Once DNS is all good, enabling SSL is just three clicks: verify DNS .. do it! .. confirm!


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LEAP#371 common emitter amplifier biasing

I am inspired once again by one of w2aew’s excellent vidoes, this time to revisit the operating classes and biasing design rules of the common-emitter amplifier.

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


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LEAP#370 TS3A5018 Digital Switch

Just a quick test of the TS3A5018 digital switch which I am looking at for an application in switching amplifier gain stages.

The TS3A5018 is a 1.8 to 3.6V device with four SPDT switches controlled from a single input, and a master active-low enable pin. It is guaranteed break-before-make (max 58ns).

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

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LEAP#369 my beeping Boldport ananas

Boldport Club Project #20 is the first designed by Ben, the new Boldporter. And it’s a beauty!

As is often the case, a small but interesting circuit is at the core of a beautiful design. The circuit is essentially four repetitions of an RC phase-shift oscillator. Like other projects such as the famous Cordwood series, the design employs multi-board symmetry and 3D construction.

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

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Here’s a quick demo (with special customisation!):


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