Here's a simple project I've been brainstorming on...
I have a 3.5" external hard drive. The problem with it is that it doesn't spin down when the device it is attached to (via USB) is turned off.
I want to make the drive shut off when it no longer detects 5V on the USB's line.
The external drive enclosure has a manual rocker switch that cuts the 12V, 2A (from a wall-wart) to the HDD and some other power supplies (5V, 3.3V, 1.8V).
Can anyone recommend an SSR or other device I could use to switch the 12V line with the 5V from the USB?
The only limitation I have is space (only have about 1"x1").
I have a 3.5" external hard drive. The problem with it is that it doesn't spin down when the device it is attached to (via USB) is turned off.
I want to make the drive shut off when it no longer detects 5V on the USB's line.
The external drive enclosure has a manual rocker switch that cuts the 12V, 2A (from a wall-wart) to the HDD and some other power supplies (5V, 3.3V, 1.8V).
Can anyone recommend an SSR or other device I could use to switch the 12V line with the 5V from the USB?
The only limitation I have is space (only have about 1"x1").