Hi folks, I was reading about the circuit below and i am having a hard time understanding what the author was trying to say in the description about the diode. Could you please try to explain what he is trying to say about the diode? How exactly is the diode helping us out by being in the circuit ?
The author said.....
Why Diode?
The relay coil cannot change it’s current instantly, diode provides a path for the current when the coil is switched off. Otherwise, a voltage spike will occur causing arcing on switch contacts or possibly destroying switching transistors
Thanks a lot for your replies.
Image source: https://igniteinnovateideas.wordpress.com/2016/04/27/control-ac-light-using-arduino/
The author said.....
Why Diode?
The relay coil cannot change it’s current instantly, diode provides a path for the current when the coil is switched off. Otherwise, a voltage spike will occur causing arcing on switch contacts or possibly destroying switching transistors
Thanks a lot for your replies.
Image source: https://igniteinnovateideas.wordpress.com/2016/04/27/control-ac-light-using-arduino/