R_C_SERVO_SWEEP_DRIVER_CIRCUIT

Published:2009/7/13 3:37:00 Author:May | From:SeekIC

The circuit shown produces a ramp that can be used to modulate the threshold of another 555 timer, which is configured to generate the pulse signal to drive the R/C servo. In this way, the servo can be slowly moved through a desired angle. Note that for long time constants, R6 and R7 will be large. Therefore, C2 should be a low-leakage capacitor, or a CMOS timer (7555) can be used to permit larger resistances and smaller capacitors to be used.



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