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by ejukated
Sat Dec 03, 2005 1:32 am
Forum: General Discussion
Topic: 555 Spike protection
Replies: 2
Views: 991

555 Spike protection

Hi, Ive been building a circuit to replace the Fuel pump relay control output from my FI ECU. I've been having problems with the 555 ic either emitting a puff of smoke and dying or melting :eek: Since it happens after repeated cranking and starting, i'm thinking its a voltage spike thats killing the...