Voltage drop when using relay - Motors, Mechanics, Power and CNC - Arduino Forum

Hi! I'm having a issue using arduino, relay and sensors. Everything works as expected from the logic point of view: sensor reads, relays close/opens, etc. The problem is the current draw of the relay and the voltage drop in the microcontroller, which impacts on the sensor readings drastically. When the relays are closed i see almost 5.1V on arduino vcc pin. If I turn on the relay, the VCC voltage drops to 4.3 v I'm learning about electronics so the questions are: what is the best elect

Overkill for dust collector - Build Logs - Avid CNC Community

Use Relays to Control High Voltage Circuits with an Arduino

Voltage Drop in Servos - Motors, Mechanics, Power and CNC - Arduino Forum

Possible improvements on this circuit with 11 relays to control water pumps, LEDs, motors - Motors, Mechanics, Power and CNC - Arduino Forum

setting up the spindle enable circuit with an arduino relay for plasma cutting · Issue #1568 · grbl/grbl · GitHub

XY Plotter - Wiring help needed. CNC shield, 2 stepper motors, 1 solenoid - Motors, Mechanics, Power and CNC - Arduino Forum

motor controller not powered from a relay - General Electronics - Arduino Forum

Tutorial: How to Configure I²C Sensors with Arduino Code

How to handle power supply voltage drop? - Motors, Mechanics, Power and CNC - Arduino Forum

fan speed affected by relay - Motors, Mechanics, Power and CNC - Arduino Forum

Automatic MOSFET load switch - Motors, Mechanics, Power and CNC - Arduino Forum

Level System Control - Motors, Mechanics, Power and CNC - Arduino Forum