Simulations

Interactive electronics simulations: change a part, watch the circuit respond.

• 555 astableThe capacitor sawtooth and output square of the classic astable.
• ADC quantizationHow many bits before the staircase disappears into the sine?
• ADC sampling & aliasingSample a sine too slowly and watch the alias ghost appear.
• Battery dischargeLi-ion, LiFePO4, NiMH and alkaline curves under real load.
• Bode plotGain against frequency on a log axis — where a filter actually stops working.
• Boost converterCoil, switch and diode turning 12 V into 24 V — and the input current the load never sees.
• Buck converterSwitch, coil and diode making 12 V into 5 V — watch the ripple and the CCM edge.
• Class-AB crossoverThe notch you hear at every zero crossing, and the bias current that closes it.
• Comparator & hysteresisWhy a noisy signal needs a Schmitt trigger — watch the chatter meter.
• Current mirrorOne transistor sets the current, its twin copies it — until the load runs out of headroom.
• DC motor start-upSwitch it on with the shaft stopped and nothing but the winding resistance limits the current.
• Diode I–V & load lineWhere the diode curve meets the resistor's load line — that's your operating point.
• H-bridge motor driverForward, reverse, brake, coast — watch the current thread the bridge.
• I2C rise timeThe pull-up has to charge every picofarad on the bus — watch the edge lose the race to the clock.
• Inductive kickbackSwitch a coil off without a diode and watch the spike that kills transistors.
• LC tank energyEnergy sloshing between coil and capacitor while R taxes it away.
• Logic gatesToggle the inputs and watch AND, OR, XOR and friends light up.
• Op-amp gain & clippingRaise the gain until the sine flattens against the rails.
• Op-amp integratorA square wave in, a triangle out — and the DC offset that quietly walks the output into the rail.
• PID controllerTune Kp / Ki / Kd on a live thermal loop — overshoot, settling, disturbances.
• PWM + RC filterDuty cycle through a low-pass — the DAC every microcontroller has.
• RC charge & dischargeA capacitor charging through a resistor, live, with its time constant.
• Rectifier & smoothingHalf or full-wave rectification and the ripple your capacitor leaves.
• Ripple counterFour flip-flops dividing by two — and the wrong numbers the pins show in between.
• RLC step responseUnder-, critically- and over-damped ringing of a series RLC.
• Servo pulse controlSlide the pulse width and the horn follows — 1.5 ms is centre.
• Shift registerEight bits march across the 74HC595 — but the pins do not move until the latch pulses.
• SR latchTwo NOR gates, one bit of memory — pulse S and it remembers.
• Stepper motorFull, half and wave drive — watch the coils fire and the rotor follow.
• TransformerTurns ratio in action — step the voltage up or down.
• Transistor switchDrive an NPN into saturation and watch Q slide down the load line.
• Transmission lineA step launched into a mismatched trace, bouncing until it settles — why a short track suddenly matters.
• UART frameOne byte on a wire that carries no clock — and the receiver's own timer walking off the bit centres.
• Zener regulatorIt holds the voltage — until the load asks for more than it can spare.