Analog electronics in the browser: seven circuits you can run and measure
Seven analog projects in Velxio's simulator: Ohm's law with an LED, a 5 V linear power supply, a transistor night light, a common-emitter amplifier, an op-amp thermostat, an Arduino PWM DAC and an ESP32 fan controller. Each one runs in the browser with real meters and an oscilloscope, and every number in the article was measured in the simulator and checked against the formula.