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Reading a 12v pulse sensor with Arduino - Sensors - Arduino Forum

Intervalometer for DSLR - Exhibition / Gallery - Arduino Forum

What Adurino do I need for Meccanoid? - #78 by goodinventor - Robotics - Arduino Forum

Replace crystal on arduino Nano or downclock to 8Mhz possible

Measure battery Voltage 4V using optocoupler and read voltage

MPU9250 randomly stops working - Sensors - Arduino Forum

Timed release of relay - Project Guidance - Arduino Forum

Can you help me with the connections of an Arduino UNO to an

i2c lcd problems :C - Programming Questions - Arduino Forum

Fried arduino - IDE 1.x - Arduino Forum

Trying to use multiple voltage sensors to trigger a motor

No current through circuit, but LED is still on - General Electronics - Arduino Forum