Hey.
It's regulation to keep the headlights on AT ALL TIMES where I live. This is extremely draining on the battery during ignition, as the battery is just not designed to supply that kind of amperage.
What i'm trying to do is to make a circuit which delays the headlights coming on by maybe 10 to 12 seconds. As this is a real life application, even if any components fail, it should stay on.
Right. What i've currently brainstormed is to splice a SCR gate (Something like the NTE5461 - NTE5468?) along the power lines to the headlamps (12v, 5amps), then connect the gate to the output of a frequency divider. That SCR gate should stay open until crystal to generate a clock signal, then CD406 to divide the frequency to something more maneagble at 0.1 hz. Or one pulse per 10 seconds.
That should ensure the SCR gate stays closed, and the headlights stay on - but only when the clock pulses 10 seconds after ignition
Feasable? And keeping in mind that i'm a complete newbie - so i'm modifying circuits on the internet to suit my needs. Main questions I have is about the crystal - how do you connect it to the frequency divider? One line to 12 volts and one line to the clock input? And how fragile are crystals?
I would have used a 555 timer, but according to a post I read, that would be extremely innacurate. At the 20 second range, at least.
Thanks for the feedback in advance.
It's regulation to keep the headlights on AT ALL TIMES where I live. This is extremely draining on the battery during ignition, as the battery is just not designed to supply that kind of amperage.
What i'm trying to do is to make a circuit which delays the headlights coming on by maybe 10 to 12 seconds. As this is a real life application, even if any components fail, it should stay on.
Right. What i've currently brainstormed is to splice a SCR gate (Something like the NTE5461 - NTE5468?) along the power lines to the headlamps (12v, 5amps), then connect the gate to the output of a frequency divider. That SCR gate should stay open until crystal to generate a clock signal, then CD406 to divide the frequency to something more maneagble at 0.1 hz. Or one pulse per 10 seconds.
That should ensure the SCR gate stays closed, and the headlights stay on - but only when the clock pulses 10 seconds after ignition
Feasable? And keeping in mind that i'm a complete newbie - so i'm modifying circuits on the internet to suit my needs. Main questions I have is about the crystal - how do you connect it to the frequency divider? One line to 12 volts and one line to the clock input? And how fragile are crystals?
I would have used a 555 timer, but according to a post I read, that would be extremely innacurate. At the 20 second range, at least.
Thanks for the feedback in advance.
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