rbt56
Small tools built for school or for a side project.
Analog circuit design
Work out real component values from a specification, with the derivation shown and an LTspice file to simulate before building.
- 02 Open
Active Filter Design
Low-pass, high-pass, band-pass or band-stop: order, transfer function, real components from the values actually in stock, a Bode plot and an LTspice schematic.
- 03 Open
AM Modulator / Demodulator Design
Design AM circuits: a JFET voltage-controlled-resistor modulator in two cell topologies, a diode plus resonant-tank modulator, and a precision-rectifier envelope demodulator.
- 06 Open
Sine Oscillator Design
Five ways to make a sine wave from op-amps: Wien bridge, phase shift, buffered, Bubba and quadrature, with amplitude stabilization, distortion, the gain-bandwidth ceiling and which one to build.
Audio and signals
Make, measure and manipulate signals in the browser, using the sound card as the instrument.
- 01 Open
Stereo L/R
Two tracks in, one stereo file out: the first on the left channel, the second on the right. Either channel can also be a generated waveform or a modulated carrier.
- 05 Open
Signal Generator
A live two-channel function generator on the audio output: sine, square, triangle, ramps, noise, AM and FM on left and right, up to what the sound card can hold, a frequency sweep for checking filters with a multimeter, and a scope.
Component guides
How each kind of part works, its basic circuits running live in a simulator, and the datasheet lines that matter when building with it.
- 07 Open
Transistor Guide
Every kind of transistor, bipolar, JFET, MOSFET, IGBT, GaN, SiC and UJT: how each works, curves to play with, basic circuits running in the Falstad simulator, design rules, and real datasheets with their pinouts.
Digital logic
Boolean minimization and the gate circuits that come out of it.
- 04 Open
Karnaugh Map Solver
Minimize a Boolean function of 2 to 4 variables on a Karnaugh map: groups, prime implicants, the minimal expression with every step, and the two-level gate circuit.
Study notes
Interactive study notes, in French.
- FR Open
ELE2307 Study Site
Statistical thermodynamics, lectures 1 to 6: the theory with interactive demos, a quiz per lecture, exercises with worked solutions and a commented formula sheet.
- FR Open
INF1010 Study Site
Object-oriented programming in C++, modules 1 to 10: step-by-step execution demos, a quiz per module, exam-style exercises with worked solutions, a midterm review and a printable cheat sheet.
More to come.
Misc
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