I need a bit of newbie handholding as I try to properly power with a wall power adapter my simple setup using a preassembled Micro Maestro for a single Hitec HS-7980TH (7.4 V) Servo.
From information I found on ServoCity’s product page for that servo, it looks like the current draw could be as much as 6A at stall when running at 7.4V. So you will probably need a power supply that can handle that much current. Additionally, you might consider using a power supply with a voltage that is within the voltage range of the servo (4.8-7.4V). Then you would not need to use an additional regulator to drop the voltage down from 9V like you would with the power supply you referenced.
This says that @ 7.4V, my stall current is 9 Amps!
Am I SOL in finding the right wall power supply that can do this?
Are there any rules of thumb where I can choose some power supply that’s close to the specs it shows? 6V operating / 7.3A stall current or 7.4V operating / 9A stall current? If I can get close enough, that’ll do for now just to get started.
I wanted to avoid the battery route because I didn’t want to be forced into a situation that would cause me to recharge (and possibly completely discharge) the battery for such a simple task. My project is not a model airplane or RC rockcrawler. I need to rotate a ~15lb LED monitor 90 degrees and back again on command. The (overkill) high torque is for overcoming inertia. This would be eventually enclosed after mock-up and testing and charging a battery, in this instance, would be a pain in the patushka!
If there’s a way to use a wall power adapter for this application, I am open to any suggestions!
It looks like the battery pack you linked to has a maximum discharge rate of 9A, so that would probably work. The AC adapter might work if you are careful to not stall the servo. Please note that with servos that draw as much current as those do, you should power the servo separately from the Maestro board. However, be sure you still connect a ground from the servo power supply to the Maestro.