I believe I am trying to stretch my power source too far, but I wanted to check with the more informed before strapping another unwanted battery to my project(s).
I am attempting to power a Mega88, a TI SN754410 Quad Half-H Driver, 2 IR detectors and 2 IR (LED) Emitters, and 2 small Mabuchi DC motors (which I am dumping 9v into) off of a single 9v battery.
The H Driver takes 5v for circuitry on VCC1 with a seperate VCC2 to power the motors. I tried using a 7805 to feed 5V to the circuit and LEDS and then fed a straight 9V to the VCC2 from the same source.
The result is an erratic circuit with obvious problems. When I connect a seperate 9v battery to VCC2, it works fine.
My problem in this case is weight. The motors are not geared and require the full 9V to operate well in my application. I am wondering if there is a way to fix this situation without the extra battery, or if I am just asking too much of a single one?