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.