Free online simulators by RAPTI — build circuits, program microcontrollers and PLCs, and practice right in your browser.
CKT Simulator
Real-time analog, digital and mixed-signal circuit simulator with 520 components, oscilloscope, multimeter, Bode plots and SPICE export.
Open Simulator →Write Arduino code, wire up LEDs, sensors and motors, and watch your sketch run — no board needed.
Coming SoonPractice ladder logic with inputs, outputs, timers and counters, and test industrial control programs step by step.
Coming SoonLearn Raspberry Pi GPIO programming with Python — control LEDs, buttons and sensors in a virtual Pi.
Coming Soon