Filter playground
A place to experiment with cutoff, bandwidth, and what filters do to a signal.
Notes
Field notes and small experiments for exploring signals, circuits, and radio.
Sampling & aliasing
See how changing the waveform and sample rate affects what you can reconstruct from its samples.
4-variable Karnaugh map
Fill a K-map with 0, 1, or don’t-care cells to see the simplified Boolean expression and its groups.
LTI systems, impulse response, and convolution
A short field note on analog and digital LTI systems, impulse response, and convolution, with visual explanations.
24 hours in the soil
A running plot of the basil plant’s latest soil and environmental readings, with each hourly report saved by the bridge.
On the drawing board
Spectrum viewer
An interactive look at tones, noise, and the frequencies hiding inside a waveform.
Impedance matcher
A visual way to explore matching networks and find your way around a Smith chart.
Link-budget calculator
A little workbench for adding up gain, loss, and distance in a radio link.