ACC wire is off when the engine is cranking, do you know?
If you tie the inverter to ACC wire, it will be off-on-off-on when you start the engine.
The ON-wire (when I said "ignition 12V" in the above postings, I meant the ON-wire, not the ignition cranking wire) has 12V even when you are cranking. I recommend you use the ON-wire to signal the TR-7 which drives a relay to power the inverter from an a constant 12V.
If I understand your situation correctly, your laptop doesn't have a working battery and powering up the inverter AND the pulsing the momentary button at the same time doesn't really turn on the laptop (because the laptop doesn't respond to a pulse when it has no power) and you need to delay the "pulsing the momentary button" 5 sec or so? I think TR-7 Feature #18 does allow a programmable delayed pulse and it was suggested above.
Again, you use the TR-7 to drive a relay which will open or close a circuit. You don't want 10A current to go thru the TR-7.
I will see if I have time to draw up the schematic. I don't have the right program to draw. Maybe I will draw by hand.
BTW, why an inverter, there should be a 12V car adapter/charger for your particular laptop. 12V DC to 19V DC instead of DC to AC to DC which is highly inefficient.
Here is a hand drawn one. Any comment welcome and even better if someone can do a bench test on it.
nserpa9248, if we can grab the 12V off the laptop, not the power supply, then the problem is solved. Somehow we need a signal that is on IF AND ONLY IF the laptop is powered up, be that in BIOS mode, or Windows rebooting, or loading drivers, etc..
Can the com port give that signal? Does it "pulse" when Windows does a reboot?
The original setup looks great and is almost just what I need. I'm not good at reading schematics and I was wondering how I could modify it for my needs. I need the momentary power switch to be 'pressed' when a on/off switch (similar to that on the back of some ATX power supplies) is clicked to 'on'. I'm also unsure about the parts that are needed. I'm new to the 'making your own hardware' category and I'd appreciate the help. I have a Dell Inspiron 600m that I need to turn on with a on/off click switch as the momentary power switch will be inaccessible in it's final permanent location, so I don't need to be able to disconnect it and reconnect it.
This thing is just going to have to have an IC timer.
I was using an AC/DC Inverter for my laptops power supply which was causing a delay. Due to the transformers charging for a few seconds before it would allow power to the power supply for the laptop.
Now I have a dc-dc converter. But the issue is the same for a different reason and as I can imagine most everyone probably has this issue as with any radio or 12v device in a car when you go to crank the car the battery is drained for a second or two as the starter turns the engine and only leaves a very small amount of amps left and the 12v device goes dead for a second or two.
Since the switch uses very little amps it switches yet the power converter (or even a inverter) is not supplying power to the laptop thus the switch is not seen.
The press has already happened and the bios ignores the consistent press the 12v relay is supplying. Since the 5v from the usb has not disengaged the 12v relay.
There needs to be a IC timer and we need to come up with one with a "variable pod"
This way anyone can adjust the delay for the switch timing depending on their car and laptop needs.
An IC can also eliminate the issues with turning the laptop on and off when it shouldn't be doing so.
Whether we come up with it or not I have to because I am about to my ends with this crap. The Pac is nice and has it's place but after much research I just don’t seeing it being a all in one solution that we or at least I need and doubt ably for everyone’s common general issue we are all having for the most part.
This new device needs to solve these common issues, be simplistic in design and installation and be reasonably inexpensive.