IR XOR Halo
Break a virtual beam, flip a 12-bit LED mask, then compare AVR register code with Arduino sketches.
Open labHands-on workbench
Buildable sensor and control labs.
The labs lane consolidates the old tutorials and bench pages into one place: parts, wiring, sketches, checkpoints, and remix ideas.
Aurora Pulse Orb
Use a NeoPixel ring and BME280 sensor to display humidity and temperature as flowing light.
Open labHydro Guardian Mini
Combine a capacitive soil probe, OLED display, and MOSFET-switched pump.
Open labPhoton Theremin
Use a time-of-flight sensor and tone generation to perform by hand distance.
Open labStandard lab shape
- Parts list with substitutions.
- Pin map and wiring table.
- Sketch or firmware with checkpoints.
- Expected readings, serial output, or visual result.
- Troubleshooting table and extension ideas.
Course-lab candidates
Next physical bridge from the Electronics path.
The next lab selection is source-backed in the docs. These are candidates, not finished route pages: each one still needs verified component values, a predict-before-measure task, and a bench-safe parts list before promotion.
Bench Divider Calibrator
Design a 24 V divider with 9 V and 12 V outputs, then load it with a meter and explain why the reading moves.
R-2R DAC Ladder
Flip binary switches, measure the voltage staircase, then compare unloaded and loaded outputs.
RC Delay And Sample-Hold
Predict threshold timing, blink two LEDs in sequence, and freeze one instant of an analog signal on a capacitor.
Night-Light Logic Window
Use an LDR threshold for a dark detector, then classify digital levels as valid or inside an illegal window.
Rectifier And Clipper Bench
Measure diode turn-on, ripple, clipping, and load sag with the scope before turning it into a smaller public lab.
555 Pulse And PWM
Build a 5 kHz astable timer, vary duty cycle, then use pulse width to encode a changing input.
Coil Inductance From A Scope
Drive a coil with a ramping current and calculate inductance from the measured voltage response.
Zener Regulator Load Test
Build a reference, vary input and load, and decide whether line regulation or load regulation is the limiting behavior.
Task spine for these labs
- Sign, units, and power direction before any bench work.
- Divider and current-split predictions before meter readings.
- Node, mesh, superposition, and Thevenin checks before network builds.
- Capacitor energy, time constants, and threshold crossings before timing labs.
- Phasor, impedance, and power-factor tasks before AC transfer labs.
- Bench report loop: predict, measure, explain mismatch, then name the next probe.