Circuit Project Electronic

T1 steps down AC voltage from 115VAC (or 220VAC) to about 8VAC and is then rectified via bridge rectifier BR1 to about 11.52Vdc. C1 filters off the AC ripple. If you find the circuit output too noisy add another electrolytic capacitor over the output terminals. Value can be between 10 and 100uF/25V. The output voltage [...]

The following diagram is for the main circuit of the motor driver. A testing version is shown later on this page. The testing circuit is laid out differently and shows the SN7474 in logic block form and LED’s are used to indicate the motor coils being switched.
#The 555 astable oscillator produces a series of [...]

A Servo Motor is a small device that has an output shaft which can be positioned to specific angular positions by sending the servo a Pulse Coded Modulation signal. As the coded signal changes, the angular position of the shaft changes. DC servo motors are used in radio controlled airplanes, radio controlled cars, robots and [...]