Pictured below is a controller we recently made for competitive air pistol shooting training.
On the shooting range there is a target connected to a motor. If the motor is powered for one second with one polarity, the target will turn to face the shooter. If the motor is powered for one second with reverse polarity, the target will turn edge on to the shooter. (Click here to see how we reverse the polarity of a motor with two relays – alternatively, we could have used an H Bridge motor controller.)
The controller has two buttons, and also screw in terminals so that external buttons can be added in parallel if the controller is to be enclosed. One button is used to toggle the target position – to edge it when it is facing, and to face it when it is edge on. The second button is used to start the training routine.
When the start timer button is pressed, the target will be turned edge on to the shooter. Then after seven seconds, the target will be turned to face the shooter for three seconds. This edge for seven seconds face for three seconds is repeated five times, and then the target is edged to wait for the next shooter.
If you need any kind of automatic timer controller board, email firstname.lastname@example.org with details of your requirements.