Abstract:
A filter disc rotator has been designed and developed in the electronics laboratory of UPSO for photometric observations. A stepper motor is used to rotate the filter disc in the forward as well as in the reverse directions. A start signal is required to drive the stepper motor to rotate the filter disc. As the filter comes in front of the diaphragm, its position is sensed by the photosensors and diaplayed on the observer panel and simultaneously a stop signal is generated to stop the motor. The observer can select the required filter at any time and may control the disc rotator remotely.
