TroyDowling
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Hey there, this is my first post here and I'm also just a hobbyist with electronics, so bear with me if I'm coming across as a complete newbie. Here's my situation: I'm trying to mimic the way an LED flashes on an automobile engine immobilizer. It flashes once every five seconds or so, and only for only a fraction of a second. I understand that for the most part, a timer such as the NE555 cannot have a duty cycle of less than 50% but I have found this resource that says it is in fact possible. The only problem I have then, is that the low time between the pulses is very short! The LED would blink at a very high frequency that way. My question is, what resistor/capacitor combo would allow me to have a low time of about 5s and a high time of one-tenth a second (approximately) for every cycle? Or, if there is a completely different way I could do this, what would that be? I'm trying to keep this simple and inexpensive because it's just a gag-gift for a friend who's obsessed with his car. :roll: Thanks in advance!