Hello,
I have attached AC fan as load to my SainSmart 8 Channel DC 5V Relay Module.
The relay board is supplied with external power supply(5V,1Amp).The relay board is controlled by MCP23017(gpio expander ic connected to my raspberry pi).
The fan is with Regulator.Sometimes when i change speed from regulator the ic is reset and relays stop working.
I would like to inform you all that a capacitor across vdd and vss has helped .
. slight voltage spike upto 2-3v is observed but its not resetting the mcp anyways. thanks to everyone who contributed ,specially John Wiltrout sir as you suggested the capacitor.
further i would like to ask is there any effect of the voltage spike on relays in future?. I read it somewhere that this spike eventually damage the relay .
I would like to inform you all that a capacitor across vdd and vss has helped .. slight voltage spike upto 2-3v is observed but its not resetting the mcp anyways. thanks to everyone who contributed ,specially John Wiltrout sir as you suggested the capacitor.
further i would like to ask is there any effect of the voltage spike on relays in future?. I read it somewhere that this spike eventually damage the relay .
