good evening I'm building a mini drone based on the eachine H8. I'm using 4 of these motors KH8C-005, two l293d, one bluetooth module and an arduino uno. My problem is how to connect a voltage source to power the motors correctly. What I did is basically set up the motors in this manner for the first l293d driver Imgur: The magic of the Internet ,for the second driver instead of connecting pin 8 to another battery I connected pin 8 to vcc from the breadboard. When I turn all the motors only three of them turn on at the same time. I also connected a 9v battery to the arduino with a battery adapter and nothing changed. I couldn't find any datasheet for the motors however I found the characteristics of the battery used for the eachines sold on websites.
Item Name: Lipo Battery
Capacity: 3.7V 150mah
Length of output line: 30mm
Charging Time : About 20 min
I was wondering if two 9v batteries are enough to power these motors at max speed? I was also wondering if it would be better to use the lipo battery above to power my drone and how would i do it?should I just connect two wires to the lipo battery and then connect it v+ and v- on my breadboard? any help would be appreciate it.