Connection Of Diode Ina Relay
The diode protects switch or relay contacts and other circuits that may be sensitive to voltage spikes. When the relay control circuit is opened turned OFF current stops flowing through the coil causing the magnetic field to collapse. Pin On Dessin Technique The diode acts like a short circuit with a small forward volt-drop and with the resistance of the relay maybe 100 ohms it will delay the relay de-activating a few extra milli-seconds. Connection of diode ina relay . Note that the placement of the diode does not prevent a voltage spike from travelling to some downstream load. Why is there a diode connected in parallel to a relay coil. A relay is commonly used to drive large electrical loads. A de-spiking clamping diode is connected in parallel with the relay coil. The reason for the diode is to shield the microcontroller from a high voltage spike that the relay coil can create. This allows the coil field to collapse without the voltage spike that would otherwise be gene...