Arduino based circuit diagrams and general Arduino projects

Note that all these links are external and we cannot provide support on the circuits or offer any guarantees to their accuracy. Some circuits would be illegal to operate in most countries and others are dangerous to construct and should not be attempted by the inexperienced. For paid software / firmware / hardware design and consulting work please see Professional software development and electronic design in Hobart, Tasmania who also serves international clients. For pre-built LoRaWAN IoT sensors with a turnkey web-based IoT monitoring platform please see Telemetry2U LoRaWAN IoT platform.

There are 54 circuit schematics available in this category. Click here for all circuit diagrams. The Last circuit was added on Saturday, January 28, 2023.Please note some adblockers will suppress the schematics as well as the advertisement so please disable if the schematic list is empty.

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Circuit	Category	Date Added	Votes
Interfacing a DSLR Hotshoe to an Arduino	Arduino	Mar 27, 2024	6
Arduino Mega 2560 schematic (PDF) - Arduino R3	Arduino	Jul 21, 2024	-1
DIY DC Amp Volt Watt Meter using an Arduino and ZXCT1010	Arduino	Jun 14, 2024	0
DIY Infrared Thermometer using Arduino Nano and MLX90614	Arduino	Jun 14, 2024	-1
Arduino RC car (Android control via Bluetooth)	Arduino	Jun 14, 2024	-2
Arduino based motion triggered camera using a PIR sensor	Arduino	Nov 13, 2024	-3
Traffic light controller using an Arduino microcontroller	Arduino	Aug 26, 2024	-2
Arduino UNO based CW decoder	Arduino	Jun 24, 2024	-1
Arduino MIDI interface (Arduino MIDI Drum Kit and Spooky Sound Trigger)	Arduino	Aug 26, 2024	-1
Simple 10 bit DAC for the Arduino using TLC274 opamp	Arduino	Jun 07, 2024	-1
Lightning shutter trigger for a camera using an Arduino	Arduino	Nov 13, 2024	-1
Circuit and Arduino sketch for interfacing to a DS18B20 1-wire temperature sensor	Arduino	Jul 21, 2024	-2
Circuit to connect a rotary encoder to a Arduino UNO	Arduino	Jul 21, 2024	-1
Solderless Breadboard Arduino Clone for Arduino prototyping	Arduino	Oct 12, 2024	-1
Ethernet shield for Arduino (Xport)	Arduino	Oct 12, 2024	-1
GPS / Datalogging shield for Arduino microcontroller	Arduino	Oct 12, 2024	0
Arduino based controller interface for servo motors, stepper motors and DC motors	Arduino	Oct 12, 2024	0
Arduino microcontroller prototyping system	Arduino	Oct 12, 2024	-1
Wave (Audio) shield for Arduino microcontroller	Arduino	Oct 12, 2024	0
Laser Modem with an Arduino Microcontroller	Arduino	Nov 13, 2024	-2
Online thermometer based on an Arduino	Arduino	Jun 20, 2024	-2
PS/2 Keyboard Or Mouse based on an Arduino	Arduino	Jun 20, 2024	-1
RFID Access Control System based on an Arduino	Arduino	Jun 20, 2024	0
Oscilloscope / Logic Analyzer based on an Arduino	Arduino	Jun 20, 2024	-2
Arduino Based Security / Automation Sensors	Arduino	Jun 20, 2024	1
Arduino speech sythesizer	Arduino	Jun 20, 2024	-2
Arduino based Time-Lapse Camera Controller	Arduino	Jun 20, 2024	-1
Interfacing an LCD touch control panel to an Arduino	Arduino	Jun 20, 2024	0
Vehicle Telemetry Platform based on an Arduino	Arduino	Jun 20, 2024	-1
Virtual USB Keyboard based on an Arduino	Arduino	Jun 20, 2024	-1
Arduino based water flow guage	Arduino	Jun 20, 2024	-3
Water Tank Depth Sensor based on an Arduino	Arduino	Jun 20, 2024	-2
Weather Station Receiver based on an Arduino and 433MHz RF receiver module	Arduino	Jun 20, 2024	-1
Arduino LFO Waveform Generator V2	Arduino	May 19, 2024	-1
The WB0RIO 28 Mhz FSCW Beacon using an Arduino	Arduino	Nov 30, 2024	-1
Arduino 7 Segment LED Display and Counter	Arduino	Apr 30, 2024	-1
Arduino alarm clock using 16x2 LCD module	Arduino	Apr 30, 2024	-1
Arduino based distance sensor	Arduino	Apr 30, 2024	-1
DIY wattmeter with an Arduino	Arduino	Apr 30, 2024	-1
Realtime GPS+GPRS Tracking of Vehicles Using Arduino	Arduino	Apr 30, 2024	-2
GSM Home Security Alarm System with Arduino	Arduino	Apr 30, 2024	-1
Arduino based line following robot in 10 minutes	Arduino	Apr 30, 2024	1
Arduino High speed Oscilloscope with PC interface	Arduino	Apr 30, 2024	-1
Arduino LCD digital clock using a DS1307 RTC	Arduino	Jun 28, 2024	-1
Arduino RF power meter that measures - 43 dBm to - 3 dBm, 1 MHz to 10 GHz using AD8319 and TMP101	Arduino	Jul 03, 2024	-1
Microphone preamplifier using an LM321 for interfacing an electret microphone to Arduino	Arduino	Jul 03, 2024	-1
AD9833 Micro Waveform Generator for an Arduino	Arduino	Jul 03, 2024	-1
ARDUINO/Genuino 'Pocket Calculator' Shield	Arduino	Jul 03, 2024	-1
Countdown timer using an Arduino	Arduino	Jul 03, 2024	0
Arduino based environmental datalogger system	Arduino	Jul 03, 2024	-1
Arduino precision voltage reference based on a REF102 reference source	Arduino	Jul 03, 2024	-1
Arduino shield to make a transistor curve tracer	Arduino	Jul 03, 2024	0
Arduino Scalar Network Analyzer, 60 MHz, 80 dB	Arduino	Jul 03, 2024	-1
Arduino Flame Sensor Interface	Arduino	Sep 14, 2024	-1