LEAP#371 common emitter amplifier biasing

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

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

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 (more...)