I'm using an SN754410 to control a DC latching solenoid. I'm sleeping the Arduino, wake on ext interrupt, pulse the solenoid open then close, then back to sleep. The solenoid is wired like a bi-dir motor to pins 3 & 6. http://itp.nyu.edu/physcomp/images/labs/hbridge_labpinout.jpg
All is good but the idle/standby/quiescent/leakage current of the hbridge VCC1 (pin16) is around 10mA, so too much for something I want to go at least a year b4 changing batts.
My lil noob brain thinks a MOSFET could be used to control power to VCC2 so it only draws current when pin enabled by the 'duino. I just can't see how to wire it in.
Any help would be appreciated.
sorry, i don't see an upload button to show my schematic :(