How to control (cut off/turn on) laptops PSU by ignition - help needed
last couple of days trying to figure out how to cut off/turn on laptops psu, mean ignition on-> psu gets 12v, ignition off-> no 12v for psu.
the best (ideal) solution here is mp3car's uSDC20D but ...as I'm Ireland based postage costs is more than controller itself :( (can't justify paying 100$ for it) so looking for simpler solution, DIY like :).
no need here for remote laptop's power on function as I'm using one of 'adopted' oem radios remaining buttons as laptops power button, just simply circuit which doing simply 'thing' hooked up between car's battery and laptop's psu ....
by any chance, have you guys schematic or link to ?
any help and ideas more than welcome