UNI-T Learning Library
Interactive explainers for test and measurement
The concepts behind every meter, scope, analyzer, and thermal camera, built so you can change the inputs and watch the result. No sign-up, no downloads. Each explainer runs in your browser.
Circuit basics
Ohm's law
Change voltage and resistance and watch current and power respond.
Open explainer → 2Series vs. parallel
Rewire three resistors and compare current, voltage, and equivalent resistance.
Open explainer → 3Kirchhoff's laws and voltage dividers
Follow every volt and every milliamp around a circuit.
Open explainer → 4Constant voltage vs. constant current
How a bench power supply decides which limit to obey.
Open explainer → 5Linear vs. switching power supplies
Ripple, noise, efficiency, and weight: what each design trades away.
Open explainer →Multimeters, explained
Counts, digits, and resolution
What 3½ digits and 6,000 counts mean, and why 6.001 V costs a decimal place.
Open explainer → 2Reading an accuracy spec
Turn ±(% + counts) into the band the true value lies in.
Open explainer → 3True RMS vs. average-responding
Change the waveform and watch one meter read wrong.
Open explainer → 4CAT ratings
Which measurement category your meter needs, from the outlet to the service entrance.
Open explainer → 5Input impedance and ghost voltages
How a meter loads a circuit, and why a dead wire can read 70 V.
Open explainer →Signals and oscilloscopes
Frequency, period, and amplitude
Where a sine wave comes from, and how to read it off a scope screen.
Open explainer → 2Sample rate and aliasing
What happens when a scope samples too slowly for the signal.
Open explainer → 3Bandwidth and rise time
Why a 100 MHz scope rounds off a fast edge.
Open explainer → 4Probes and probe compensation
1× vs. 10×, loading, and tuning a probe on the calibration square wave.
Open explainer → 5Impedance matching
Send a pulse down a cable and watch a mismatched load reflect it back.
Open explainer →Oscilloscope specs, explained
8-bit vs. 12-bit resolution
Digitize the same signal both ways and zoom in on the detail.
Open explainer → 2ENOB: effective number of bits
Why the bits on the label and the bits you actually get differ.
Open explainer → 3Memory depth
How memory, sample rate, and capture time trade against each other.
Open explainer → 4Capture rate and Sequential Mode
How fast a scope re-arms decides how quickly it catches a rare glitch.
Open explainer →Frequency domain
Buses and decoding
Thermal imaging
UNI-T Learning Library. Design. Debug. Deploy.™