Source: https://mokxi.com/templates Updated: 2026-09-27 Projects # Every built-in project, in one grid Each one is a real project, ready to run: pick a board or a kind of lesson and open it in the editor. Teachers hand any of them to a class as the starter. Shared by people Blink and press A pushbutton and a 2 Hz clock, no processor in sight. Built in ●○○ First steps Hello, breadboard A switch, a resistor and an LED: the first circuit, with the whole loop in view. Built in ●○○ First steps MOSFET switch A 2N7000 switching an LED from a slide switch, with no gate resistor anywhere: the switch a board pin reaches for. Built in ●○○ First steps Zener regulator A 1N4733A holding 5 V out of a 12 V supply, with the load line that says where it settles and what the load costs. Built in ●●○ First steps 555 tone A 555 astable drives a piezo straight from the output pin, no board and no button. Built in ●●○ Logic Gate lab Two buttons drive an AND, an XOR and a NOT, so the truth table lights up as you press. Built in ●○○ Logic Binary counter Two 74HC74s ripple-count on four LEDs, four steps a second, no microcontroller. Built in ●●● Logic Display Decade chaser A 555 astable clocks a CD4017 decade counter and ten LEDs take turns to light, with no microcontroller. Built in ●●○ Logic Switch shifter A 74HC165 loads an 8-way DIP switch at the press of a button and clocks the byte out one bit a second onto an LED. Built in ●●○ Logic BCD display Four DIP switches set a number in binary and a CD4511 shows it as a digit on a seven-segment display. Built in ●○○ Logic Display Decoder chaser A 74HC14 oscillator clocks a 74HC161 counter and a 74HC138 decoder lights one LED of eight at a time. Built in ●●● Logic Up/down counter A slide switch and a 74HC02 steer a clock into a 74HC193, which counts up or down in binary on four LEDs. Built in ●●● Logic ESP32-C3 blink An LED on GPIO 8, driven by real firmware. Built in ●○○ ESP32-C3-DevKitM-1 First steps ESP32-C3 knight rider An ESP32-C3 sweeps a bright dot back and forth along six LEDs, one GPIO each. Built in ●○○ ESP32-C3-DevKitM-1 Display ESP32-C3 Ring Simon Simon on a sixteen-LED ring with a rotary encoder: turn the knob to the color you were shown and press the shaft. Built in ●●● ESP32-C3-DevKitM-1 Game Display ESP32-C3 OLED dice A die tumbling on a 128x64 OLED, thrown by holding an arcade button and slowing to a stop when you let go. Built in ●●○ ESP32-C3-DevKitM-1 Game Display Uno OLED pong Pong on a 128x64 OLED with a thumb stick for the paddle: where the ball strikes sets the angle it leaves at. Built in ●●● Arduino Uno R3 Game Display ESP32-C3 OLED pong The thumb-stick pong, on the other board: a twelve-bit ADC moves the paddle and the score is drawn in digits. Built in ●●● ESP32-C3-DevKitM-1 Game Display ESP32-C3 thumb stick A thumb stick on the ESP32-C3 ADC: the raw axes go to the serial monitor and how far the stick is pushed sets how brightly the LED on that side is lit. Built in ●●○ ESP32-C3-DevKitM-1 First steps Uno snake on two matrices An 8x16 play field on two MAX7219 modules, steered with a thumb stick: eat the apple, grow, and do not hit a wall or yourself. Built in ●●● Arduino Uno R3 Game Display ESP32-C3 Stacker The arcade stacker game on two cascaded MAX7219 matrices: the row slides, the button drops it, the overhang is cut off. Built in ●●● ESP32-C3-DevKitM-1 Game Display ESP32-C3 rainbow strip An ESP32-C3 runs a hue wheel along sixteen WS2812Bs, bit-banged to the datasheet pulse widths. Built in ●●○ ESP32-C3-DevKitM-1 Display ESP32-C3 OLED shapes The same 128x64 SSD1306 demo on the other board: one driver, two pin numbers changed. Built in ●●○ ESP32-C3-DevKitM-1 Display ESP32-C3 Simon Four LEDs flash a growing sequence, four buttons play it back. Built in ●●● ESP32-C3-DevKitM-1 Game Uno traffic light An Uno runs a pelican crossing, with a 74HC04 lighting the WAIT lamp straight off the button. Built in ●●○ Arduino Uno R3 Logic Uno reaction timer The Uno lights a lamp at a random moment and prints how many milliseconds you took. Built in ●●○ Arduino Uno R3 Game Uno electronic dice A button rolls a die and an Uno tumbles the number onto a seven-segment display. Built in ●●○ Arduino Uno R3 Game Uno Pong console An Uno, a 240x320 TFT, a thumb stick and a piezo: a paddle game in the window an Uno can repaint. Built in ●●● Arduino Uno R3 Game Display Uno metronome The Uno clicks a beat on a piezo and two buttons walk the tempo between 40 and 240 bpm. Built in ●○○ Arduino Uno R3 Sound First steps Uno night light A lamp fades up when the sensor pin goes dark, with a pushbutton standing in for the light sensor. Built in ●○○ Arduino Uno R3 First steps ESP32-C3 Morse sender An ESP32-C3 sends a word in Morse on a lamp and a piezo at once, and a button picks the next message. Built in ●○○ ESP32-C3-DevKitM-1 Sound First steps Uno reaction duel Two buttons, three lamps and a piezo: the Uno lights the middle lamp and the first press wins. Built in ●●○ Arduino Uno R3 Game Sound ESP32-C3 dice A button rolls a die and an ESP32-C3 tumbles the number onto a seven-segment display. Built in ●●○ ESP32-C3-DevKitM-1 Game Display ESP32-C3 binary clock An ESP32-C3 writes the hours, minutes and seconds as three rows of binary lamps on a 128x64 OLED. Built in ●●○ ESP32-C3-DevKitM-1 Display Logic Uno joystick bar graph A thumb stick moves a bar along eight LEDs, and pressing the stick swaps the bar to the other axis. Built in ●●○ Arduino Uno R3 Display Uno shift-register bar An Arduino Uno runs a bar and a bouncing dot along eight LEDs through a 74HC595. Built in ●●● Arduino Uno R3 Logic Display Uno matrix ball An Arduino Uno bounces a dot around an 8x8 LED matrix on a MAX7219, three wires and eight registers. Built in ●●○ Arduino Uno R3 Display Game OLED on an Uno A 128x64 SSD1306 over bit-banged I2C: titles, shapes, a bouncing ball and a counter. Built in ●●○ Arduino Uno R3 Display Uno Snake Snake on a 240x320 TFT with a thumb stick: eat the apple, grow, and repaint only the squares that moved. Built in ●●● Arduino Uno R3 Game Display Two boards, one wire An ESP32-C3 pulses a number down one wire and an Arduino Uno counts it back out on the serial monitor. Built in ●●● Arduino Uno R3 Logic 555 blinker A 555 astable blinks an LED, and a slide switch swaps the timing resistor from 1.4 Hz to 7.4 Hz. Built in ●●○ Logic Doorbell A pushbutton lifts the 555 out of reset and a 4 Hz astable beeps the buzzer. Built in ●●○ Sound Logic ESP32-C3 plasma panel Three sine waves drift across a 16x16 WS2812B matrix, 256 LEDs on one wire from an ESP32-C3. Built in ●●● ESP32-C3-DevKitM-1 Display ESP32-C3 Pong The same TFT paddle game on an ESP32-C3, full screen at forty frames a second, played with two buttons. Built in ●●● ESP32-C3-DevKitM-1 Game Display Pico chaser A dot sweeps back and forth along six LEDs on GP2 to GP7, one GPIO each. Built in ●○○ Raspberry Pi Pico Display STM32 chaser The same six-LED sweep on the Black Pill, wired to PA1 through PA6. Built in ●○○ STM32F411 Black Pill Display Dimmer A potentiometer on A0 sets the brightness of an LED on pin 9. Turn the knob while it runs. Built in ●○○ Arduino Uno R3 First steps ATtiny85 dimmer A knob on PB2 dims an LED on PB0, out of an eight-pin chip in the breadboard. No board, no USB, just the chip and its two rails. Built in ●●○ ATtiny85 First steps Night light A light-dependent resistor in a divider fades a lamp up when the room goes dark. Drag the slider on the sensor. Built in ●●○ Arduino Uno R3 First steps Lux night lamp A BH1750 light meter on I2C and an LED on a PWM pin: the darker the room, the brighter the lamp, with the reading in lux on the serial monitor. Built in ●●○ Arduino Uno R3 First steps Dosing pump A peristaltic pump on an encoder gear motor and an L9110S: press the button and it pumps exactly 5 ml, counting the encoder's pulses and slowing for the last turn. Built in ●●● Arduino Uno R3 Machines Line-following cart A five-channel line tracker, a TB6612FNG and two gearbox motors on a 2S 18650 pack: the cart steers to keep the tape under its middle sensor and stops at the finish bar. Built in ●●● Arduino Uno R3 Machines Pocket gaussmeter A 49E linear Hall sensor on A0 and a 16x2 I2C LCD: the field in gauss, which pole it is, and the strongest seen since power on. Built in ●●○ Arduino Uno R3 First steps Display Secret knock lock An SW-420 vibration sensor on the door listens for a secret rhythm, three quick knocks and one after a pause: the right one opens the servo bolt, anything else flashes red. Built in ●●● Arduino Uno R3 Machines Touchless soap dispenser An FC-51 infrared obstacle sensor and a pump on a transistor: hold a hand under the spout and it pumps one dose, then waits for the hand to go away. Built in ●●○ Arduino Uno R3 Machines Thermometer A TMP36 on A0 and the temperature on a 16x2 LCD in four-bit mode, with the high and low on the second row. Built in ●●○ Arduino Uno R3 Display Parking sensor An ultrasonic ranger and a buzzer that beeps faster as the wall gets closer. Drag the slider to move the wall. Built in ●●○ Arduino Uno R3 Sound D-pad pong A TFT, a console pad and a piezo on an Uno: paddle game, arrow keys or clicks, A to serve. Built in ●●● Arduino Uno R3 Game Display Tilt alarm Tip the tilt switch and a buzzer and a lamp sound off until the arcade button on pin 3 resets them. Half-size board. Built in ●○○ Arduino Uno R3 Sound First steps Servo fader A slide potentiometer on A0 sets the angle of a servo on pin 9. Push the fader and the horn follows. Built in ●●○ Arduino Uno R3 First steps Motor on a transistor A DC motor driven from pin 9 through a 2N2222, with a flyback diode across it. The PWM ramps up and down and the shaft follows. Built in ●●○ Arduino Uno R3 Logic Motor both ways An L293D H bridge turns a DC motor forward and back from three Uno pins, and shows what braking does that coasting does not. Built in ●●○ Arduino Uno R3 Logic Robot car drive Two gearbox motors on an L298N module from six Uno pins: forward, a turn, a spin on the spot and reverse, with the speed on ENA and ENB. Built in ●●○ Arduino Uno R3 Machines Obstacle-avoiding car A 2WD robot car on an L298N with an HC-SR04 on the front. It drives ahead, and when something comes within 25 cm it backs up, turns and carries on. Built in ●●○ Arduino Uno R3 Machines L9110 motor by hand An L9110S module, a motor, a four-AA pack and two switches, no board: each output follows its input, and equal inputs brake. Built in ●○○ Machines TB6612 robot drive Two gearbox motors on a TB6612FNG from a four-AA pack, with the SparkFun library: forward, half speed, a spin, reverse, a brake and standby. Built in ●●○ Arduino Uno R3 Machines Bumper car A 2WD robot car on a DRV8833 with two lever microswitches for bumpers. It drives until a bumper is hit, then backs off and turns away from that side. Built in ●●○ Arduino Uno R3 Machines Robot arm with joysticks A four-servo desktop arm on four Uno pins, steered by two joysticks with the Servo library: base and shoulder on one stick, elbow and claw on the other. Built in ●●○ Arduino Uno R3 Machines Pick and place arm on a PCA9685 A four-servo arm on a PCA9685 servo board with the Adafruit library: it picks a part up on one side, sets it down on the other and goes home, over and over. Built in ●●● Arduino Uno R3 Machines Stepper turntable A photo turntable on a 28BYJ-48 and its ULN2003 board with AccelStepper: press the button and the plate turns a full circle in eight stops, flashing the camera LED at each. Built in ●●○ Arduino Uno R3 Machines Touch climate display An AHT20 and a 16x2 I2C LCD on the same two wires, and a TTP223 touch pad that flips the reading between Celsius and Fahrenheit. Built in ●●○ Arduino Uno R3 Display Heat, magnet and wheel An LM35 on A0, an A3144 Hall switch on pin 2 and a slotted photo interrupter counting a 20-slot wheel on pin 3, read on the serial monitor. Built in ●○○ Arduino Uno R3 First steps Steppers on A4988 and DRV8825 STEP and DIR into an A4988 and a DRV8825, each turning a NEMA 17. The same pulses to both, and the DRV8825 turns half as far. Built in ●●● Arduino Uno R3 Machines Music box A tune on an 8 ohm speaker through 100 ohms, a continuous-rotation servo turning the drum, and a coin vibration motor on a transistor buzzing on the beat. Built in ●●● Arduino Uno R3 Sound Machines Relay board A four-channel relay board chasing four lamps from pins 2 to 5. Active low, so LOW is on, and the pins are written HIGH before they become outputs. Built in ●●○ Arduino Uno R3 Machines Relays reverse a motor Two motors turned both ways by relays: one on a two-channel board wired as an H bridge, one on a bare DPDT relay switched by a transistor. Built in ●●● Arduino Uno R3 Machines Claw machine controller Move a two-motor gantry with the joystick, then press Drop to lower, grab, lift and release with a winch motor and servo. Built in ●●● Arduino Uno R3 Machines Game Door alarm A reed switch and a magnet on pin 2: open the door and a buzzer and a lamp latch on until the arcade button resets them. Half-size board. Built in ●○○ Arduino Uno R3 Sound First steps Motion light A PIR module, a transistor and a lamp, no board. Click the dome and the light holds for two seconds after the movement stops. Built in ●○○ First steps Comparator boards An MQ-2, a flame sensor and a TCRT5000, each lighting a lamp from DO with no board. The same LM393 under three sensors, and DO goes low. Built in ●○○ First steps Squeeze and bend A force-sensing resistor lights a lamp harder the harder it is pressed, and a flex sensor climbs from 25 k on a multimeter as it bends. Built in ●○○ First steps Thermometer on an I2C LCD A 10 k NTC bead in a divider on A0, the temperature on a 16x2 character LCD over its PCF8574 backpack. Four wires to the display. Built in ●●○ Arduino Uno R3 Display Weather station A DHT22 on one wire and a 16x2 I2C display on two. Forty bits and a checksum, a first reading that fails, and a sensor that will not be hurried. Built in ●●○ Arduino Uno R3 Display Air quality monitor An SGP30 and an SHT31 on one I2C bus with a four-digit LED display: CO2 in ppm, then temperature and humidity, and a red LED above 1000 ppm. Built in ●●○ Arduino Uno R3 Display Color sorter A TCS34725 color sensor looks at each candy and a servo swings the chute to its bin: six colors, and an empty chute it waits on. Built in ●●○ Arduino Uno R3 Machines Scoreboard A MAX7219 eight-digit display driven with LedControl: home score, a ten-minute game clock and the guest score, with a button for each team and one for the clock. Built in ●●○ Arduino Uno R3 Display Round watch face An analog watch face on a GC9A01 round display: hour, minute and second hands from a DS3231 clock, redrawn each second. Built in ●●○ Arduino Uno R3 Display E-paper name badge A 2.13 inch SSD1680 e-paper badge driven with GxEPD2: the name drawn once, a button that swaps the bottom line with a partial refresh, and a picture that stays with the power off. Built in ●●○ Arduino Uno R3 Display Clap switch A KY-038 sound sensor: clap and the lamp toggles. A clap is a burst of pulses on D0, and A0 barely moves, because there is no amplifier. Built in ●○○ Arduino Uno R3 Sound Kitchen scale A bar load cell on an HX711, read with the HX711 library: tare, a scale in counts per gram, and grams on the serial monitor. Built in ●●○ Arduino Uno R3 Machines Plant monitor A soil moisture sensor, a rain sensor and a water level sensor on three analog pins. Two read lower when wetter and one reads higher. Built in ●●○ Arduino Uno R3 Machines Desk clock A DS3231 over I2C and a TM1637 on two wires that are not I2C. BCD registers read in one transfer, a colon that blinks every second, and a logic analyzer on the bus decoding every byte. Built in ●●○ Arduino Uno R3 Display Community ## What people are building The shared projects with the most hearts on them. Every one opens in the editor. ### Yours could be the first Build something and make it public. It shows up here for anyone to open and heart. Share a project Browse every shared project