18650 powered servo to rotate a shaft 90 degrees?

Off-topic Chatter
1

I would like to use a cheap servo to rotate an 18” long 1/4” steel shaft about 90 degrees. If possible I would like it battery powered using 18650 cell(s) and remotely operated up to 100 feet.

I don’t know much about servos! But am sure there are smarter people here who can point me to some of the necessary parts. Here’s what i want to do:

attach small steel targets to this shaft so my son can shoot them with his pellet gun and they fall backwards, rotating out of sight. The target will be made such that it has a collar that he shaft slides through to allow the target to rotate about the shaft. I’ll make the shaft such that rotating it 90 degrees raises the target back upright. Then power shuts off the servo and the shaft is free to rotate back if needed the next time a target is knocked down. The targets are small…maybe less than 1.5”x1.5” so the servo doesn’t have to have much torque at all.

Alternatively, I don’t have to rotate the shaft at all. I guess I could find a servo that will pivot an arm 90 degrees and I could incorporate that into the design instead.

Anybody fool with such equipment?

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Arduino is usually the go to way for beginners to do such things. For the remote control part you could just try an IR remote. I’ve never really checked the range possible. You just add an 38 kHz IR receiver to the arduino. See the ardunio forums for code to run servos and process IR commands. They also have really cheap RF modules that you can use with an arduino. You could even control it with a smartphone using a cheap ESP8266 wifi module.