Footprint Projects
Browse electronics build guides with illustrated explanations, parts lists and step-by-step instructions. Bring a project's parts to BOM Studio to compare available supplier offers.
- ULN2003 + 28BYJ-48 Stepper Driver
- DS3231 RTC Clock with Arduino
- Bare ATmega328P Blink
- MCP3008 12-bit ADC Tester
- AMS1117 LDO + Brown-Out Supervisor
- MAX7219 8×8 LED Matrix Display
- TP4056 USB-C Li-Ion Charger
- Joule Thief — LED from a Dead AA
- ESP8266 IoT Button
- CD4017 10-LED Knight Rider Chaser
- IRFZ44N MOSFET LED Driver
- Arduino Relay Driver — Switching the Mechanical World
- L293D Dual H-Bridge DC Motor Driver
- 555 + LM386 PWM Speaker
- TTP223 Capacitive Touch Lamp
- 555 PWM Motor Controller
- 4N35 Optocoupler — Galvanic Isolation Demo
- PCF8574 I²C 8-LED Bargraph
- XL6009 Adjustable Boost Converter
- LM741 Schmitt Trigger
- A3144 Hall-Effect Tachometer
- LM317 Adjustable 1.25–25 V Bench Supply
- TL431 Precision Voltage Reference
- LM358 Wien-Bridge Sine Oscillator
- HC-SR04 Ultrasonic Tape Measure
- RC Low-Pass Filter Step Response
- NE5532 Low-Noise Audio Preamp
- 2N2222 Common-Emitter Audio Amplifier
- 74HC595 Shift-Register 8-LED Bar Graph
- LM358 Photodiode Light Meter
- LM35 Analog Thermometer with Arduino
- 2N3904 BJT Astable Multivibrator
- 74HC00 Quad-NAND Logic Oscillator
- ATtiny85 Dev Board
- Arduino + DS18B20 Temperature Logger
- 555 LED Blinker
- BME280 Temperature / Humidity / Pressure Node
- ESP32-S3 USB-C Dev Board
- MP1584 Buck Converter
- LM7805 USB Power Supply
- ESP32 + SSD1306 OLED Weather Display
- LDR Night Light
- LM358 Audio Amplifier
- 74HC14 Schmitt-Trigger Switch Debouncer
- TLC555 Low-Power LED Beacon
- ULN2803 8-Channel Darlington Driver
- MCP4725 I²C DAC Sine Generator
- NE555 Monostable One-Shot Timer
- L7812 12 V Fan Supply
- LM317 Constant-Current LED Driver
- DHT11 Temperature + Humidity Logger
- 74HC4017 Decade Counter LED Runner
- 74HC165 Parallel-In Shift Register Input Expander
- 2N7000 Logic-Level MOSFET LED Switch
- MAX232 RS-232 Level Translator
- MCP41010 SPI Digital Potentiometer
- SSD1306 + DS3231 Desk Clock
- 74HC393 Dual Binary Counter Clock Divider
- 74LS138 3-to-8 Demux LED Chaser
- MAX6675 K-Type Thermocouple Thermometer
- SS49E Linear Hall-Effect Field Meter
- TM1637 4-Digit 7-Segment Clock Display
- LM386 Mini Audio Amplifier
- L298N Dual H-Bridge DC Motor Driver
- NTC Thermistor Fan Controller
- ICL7660 Charge-Pump Negative-Rail Generator
- MPU6050 Tilt Indicator
- 74HC4511 BCD-to-7-Segment Driver
- BMP180 Barometric Altimeter
- TL072 Stereo Headphone Amplifier
- XL6009 5 V → 12 V Boost Converter
- HD44780 16x2 Character LCD
- LM393 Comparator Dark Detector
- WS2812B Addressable RGB Strip
- ESP32 Deep-Sleep Wake-on-Touch
- TSOP4838 IR Remote Receiver
- CD4051 8-Channel Analog Mux Scanner
- HC-SR501 PIR Motion Sensor
- LM2596 Adjustable Buck Supply
- Sallen-Key 2nd-Order Active Low-Pass Filter
- A4988 Microstepping Driver for NEMA-17
- SG90 Arduino Servo Sweep
- DRV8825 Stepper Microstepping Driver
- MAX31855 K-Type Thermocouple Reader
- CD4060 14-Stage Counter Slow Blinker
- AD9833 DDS Waveform Generator
- 555 Optical Theremin
- Persistence-of-Vision LED Wand
- Single-Transistor AM Radio
- 555 Plant Moisture Tweeter
- ATtiny85 TV-B-Gone
- Where the current splits
- The disappearing-volts divider
- The slow-motion capacitor
- The buffer that holds its ground
- Five times the small signal
- A signal gate you can measure
- The two-input disagreement detector
- A bridge that notices small changes
- A sensor signal on a knob
- Eight voltages from three bits
- RC522 RFID Card Reader
- MAX9814 Microphone VU Meter
- INA219 I²C Power Monitor
- ACS712 Hall-Effect Current Sensor
- Bourns PEC11R Rotary Encoder Counter
- Arduino tone() Melody Player
- Arduino MicroSD Data Logger
- MCP23017 I²C GPIO Expander
- TM1638 8-Digit Display + Button Module
- DS1307 + Coin-Cell RTC
- 74HC74 Frequency Divider
- RN42 Bluetooth Serial Bridge
- nRF24L01+ Wireless Link
- MCP9808 Precision Thermometer
- VL53L0X Time-of-Flight Distance Sensor
- u-blox NEO-M9N GPS Logger
- TCS3200 Colour Sensor
- MQ-3 Breathalyser
- TDA2030A 14 W Speaker Amplifier
- CD4046 PLL Frequency Multiplier
- 6N137 High-Speed Optoisolator Link
- PCF8591 I²C ADC + DAC Lab
- BPW34 Photodiode Pulse Detector
- MK24 Reed Switch Door Sensor