August 2021 Updates
1. Updates This Month
A new page on Probabilities. Added info on it about how to generate random numbers that follow a specific distribution.
Updated the Resistors page from Markdown to AsciiDoc format.
Added a red horizontal bottom boarder to all
h2headings in the main content of each page.
Consolidated all the info on non-isolated switch-mode power supplies (e.g. buck converters, boost converters, buck-boost, SEPIC, Ćuk) into a single page. And then added more info, as well as updating the basic schematics of the various topologies to match this site’s style.
Added info on MQTT clients suitable for embedded devices.
Expanded the TOC to contain heading levels 2 to 4 (beforehand it was only showing level 2).
Added the ability to define multiple authors per page, and added an author block to all content pages. Followed a really useful tutorial at https://moonbooth.com/hugo/authors/.
Added a safe operating area (SOA) graph to the BJT page, and added information on secondary breakdown.
Added info on low-dropout linear regulators.
Updated the Ethernet page with info on serial-to-ethernet ICs.
New AWS IoT page.
New Isolated Switch Mode Power Supplies page, with info on flyback converters including basic schematics and feedback using optoisolators.
July 2021 Updates
1. Updates This Month
A new page on Gas Discharge Tubes (GDTs), with schematic symbols, designators and examples.
Added a new example of a noisy waveform to the Electrical Noise page.
Added a new page (in notes format) on Spark Gaps.
Added info on transient surge waveform specification, including a graph illustration the concept behind 8/20us and similar specifications:
Moved Zener diode info into it’s own page.
Cleaned up many of the schematic symbols on this site for a consistent look and feel:
Added a diagram showing the protection diodes common to most digital CMOS pins.
June 2021 Updates
1. Updates This Month
Combined the "Passing A C++ Member Function To A C Callback" page into the "C++ Callbacks" page. Updated the page with much more info, including worked examples which use https://replit.com/@gbmhunter for hosting, compiling and running small snippets of C++ code.
Updated the Electrical Noise page with info on the various "Colours of Noise" including graphs (in both the time and frequency domains) of white, pink, red, and blue noise.
Added info on Hakko soldering tweezers to the Soldering Irons And Stations page.
Starting testing the Asciidoc format and comparing it against the Markdown format.
Added schematics, equations, worked examples, and bode plots on Capacitance Multiplier circuits.
Removed the "Test And Measurement" section of the site. Moved the only page underneath it (the "Current Probes" page) to under "Tools" instead.
Added a new page on AC/DC Electronic Loads.
Added a new page on Line Impedance Stabilization Networks (LISNs).
The main structure of this sites HTML was updated to use Bootstrap containers and columns to create a responsive layout. At the same time, the main menu was updated from a hover-based tree view to a expandable tree view which should be more friendly towards users with touch screen devices. The Table of Contents for pages is now also added at a fixed location in a right-hand column for large screen devices.Figure 1. Before HTML/CSS UpdatesFigure 2. After HTML/CSS Updates
May 2021 Updates
Added equations/proofs involving the Wien bridge oscillator.
Added diagrams and info on coaxial cables.
Added schematics and simulation results for a JFET gain-limited Wien bridge oscillator.
Added a JFET component to the KiCad simulation library.
Added info on CAN bus mailboxes.
Added a new page on Hashes.
More info added on the MQTT Paho library.
Added a section on Ring Oscillators to the Oscillators page. Added simulation results for a three stage ring oscillator.
Added schematics on a BJT-based astable multivibrator:
Added info on noise power spectral density and noise amplitude spectral density. Added more info about thermal (Johnson-Nyquist) noise including equations and a worked example involving a
Added graphs of a simple moving average (SMA) filter’s frequency response.
Added photos of the vintage 'Micronta Transistor Tester' (a Radio Shack brand) to the BJT transistors page.
April 2021 Updates
Updates to the Python page on asyncio including info and code examples on Tasks and how they are scheduled for execution immediately.
Added info on industry standard package pinouts for op-amps.
Added Win Source Electronics and Microchip Direct to the Electronic Suppliers page.
Added an equivalent circuit model for a crystal (piezoelectric resonator).
More info on crystal resonator operating modes.
Added new page with info on JFETS.
Added info on the Wien bridge oscillator to the Oscillators page. This includes schematics:
and simulation results: