Configurable shutdown period? - Printable Version +- BlueWave Studio forum (https://bluewavestudio.io/community) +-- Forum: Hardware for head-unit (https://bluewavestudio.io/community/forum-87.html) +--- Forum: Power Supply BWS CAR PS (https://bluewavestudio.io/community/forum-61.html) +--- Thread: Configurable shutdown period? (/thread-724.html) |
Configurable shutdown period? - mentalinc - 03-15-2019 Like this: In short, turn off the ignition, the pi turns the display off but keeps running for an hour and if the ignition isn't turned back on it turns off. If the ignition is turned on the screen comes on and you're already booted so its an "instant on". great for quick stops like the gas station or popping into the shops. Thoughts or guidance on how to make this possible? Re: Configurable shutdown period? - BlueWave - 03-16-2019 Re: Configurable shutdown period? - Hisma - 03-31-2019 Re: Configurable shutdown period? - mentalinc - 04-17-2019 Can you please explain what the relay is for between the timer and the GPIO pin? Can we not just use a step down from 12v to 3.3v something like a LM2596 for example? Re: Configurable shutdown period? - Hisma - 04-18-2019 Re: Configurable shutdown period? - mentalinc - 04-27-2019 Did you need to change the amps at all or is the drop to below 3.3v enough (but closer to 3.3 than 0v) enough? I.e. do I need to play with resistors to change amps etc?, I can't see anyone saying they needed resistors.. Re: Configurable shutdown period? - Hisma - 04-28-2019 You can do the exact same thing with a 12V ignition trigger wire. Ignition on = relay on. Ignition off = relay off, script starts shutdown timer. |