Community labs
Every public lab in one place. Open one, play with the circuit, run the sketch. Press Fork and the whole thing becomes yours to remix.
Blink
The hello-world circuit: 9V battery, 330Ω resistor, LED, ground. Fork it and try a 3V battery, or a 100Ω resistor to watch the LED burn out.
ExoSynk0031h ago
Voltage divider demo
Two 10kΩ resistors in series across a 9V battery. The tap in the middle sits at 4.5V. Try different R1/R2 ratios.
ExoSynk00110h ago
RGB color fader (Arduino PWM)
Arduino drives a common-cathode RGB LED through three 330Ω resistors. Code cycles R, G, B via analogWrite — classic PWM color mixing.
ExoSynk00010h ago
7-segment counter (0-9 on Arduino)
Seven Arduino digital pins drive a common-cathode 7-segment display. A shared 330Ω resistor limits current to ground. Code counts 0→9 in a loop.
ExoSynk00010h ago
Dark-activated night light (LDR + NPN switch)
Classic analog circuit — no Arduino. An LDR forms a voltage divider that drives an NPN base. LED turns on only when ambient light drops. Four parts, one transistor, zero code.
ExoSynk00010h ago