Community projects
Circuits people built in the lab and shared. Open one, run it, change it, and publish your own version. Anyone can publish from the lab: File menu, "Publish to the community".
Solar floodlight: 24 SMD LEDs on three 3.2 V LiFePO4 cells
3 × LiFePO4 cell, 3 × Resistor, Small poly panel, Schottky diode
by Zen Circuit Lab · 3 days ago · 17 viewsESP32 rainbow lamp: 16 WS2812 LEDs, a speed knob and a mode button
ESP32 DevKit, USB charger / port, WS2812 LED strip, Resistor
by Zen Circuit Lab · 5 days ago · 9 viewsESP32 weather station: BME280 on an OLED
ESP32 DevKit, USB charger / port, OLED display (I²C), BME280 environment sensor
by Zen Circuit Lab · 5 days ago · 11 viewsElectronic dice with real pips: 555 + CD4017 + diode logic
11 × Resistor, 11 × Signal diode, 7 × LED, 4 × NPN transistor
by Zen Circuit Lab · 5 days ago · 5 views0–9 counter on a 7-segment display: 555 → 74HCT393 → 4511
3 × Electrolytic capacitor, 2 × Resistor, 9 V battery, 7805 regulator
by Zen Circuit Lab · 5 days ago · 9 viewsTraffic light from a 555, a CD4017 and ten diodes
10 × Signal diode, 5 × Resistor, 3 × LED, 9 V battery
by Zen Circuit Lab · 5 days ago · 6 views10-LED chaser: 555 + CD4017
10 × LED, 3 × Resistor, 9 V battery, 555 timer
by Zen Circuit Lab · 5 days ago · 5 viewsESP32 parking sensor: HC-SR04, three LEDs and a beeper
6 × Resistor, 3 × LED, ESP32 DevKit, USB charger / port
by Zen Circuit Lab · 5 days ago · 6 viewsDusk-to-dawn porch lamp: LDR switching a 220 V bulb through a relay
9 V battery, 7805 regulator, Electrolytic capacitor, Potentiometer
by Zen Circuit Lab · 5 days ago · 9 viewsLight-barrier alarm that latches: LDR + 555 bistable
5 × Resistor, 2 × LED, 9 V battery, Photoresistor (LDR)
by Zen Circuit Lab · 5 days ago · 4 viewsTwo-transistor flasher (astable multivibrator)
6 × Resistor, 2 × NPN transistor, 2 × Electrolytic capacitor, 2 × LED
by Zen Circuit Lab · 5 days ago · 5 viewsAutomatic cooling fan: LM35 + LM358 + MOSFET
5 × Resistor, LiFePO4 battery, Fuse, LM35 temperature sensor
by Zen Circuit Lab · 5 days ago · 9 viewsDC Fan with Charging
DC motor, TP4056 charger module, USB charger / port, Potentiometer
by Zen · 6 days ago · 8 viewsPublish your own
Build a circuit in the lab, then choose Publish to the community from the File menu. You get a link to share, an embed code for your blog or course page, and a key that lets you update or remove it later. No account needed. You can also import a Wokwi project and see what the lab finds in it.