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22 Threads found on edaboard.com: Relay 220
Sparking can be minimized by placing series connection of 100ohm resistor and 10n-100n capacitor accross relay contacts.
Hi all, I was design a intelligent relay board using microcontroller AT89C52, array NPN transistor(ULN2003) and optocoupler(MCT6). but that is fail design, because relay that already ON, can OFF randomly. any bodhy here help me, to show circuit or a way to design a good relay board for controlling a inductive lamp (Neon)