Free Simple Circuit Diagram
This alarm siren circuit give continuous frequency sweep, a warbling sound. The warbling period is about 6 seconds, 3 seconds for frequency sweeping up and 3 seconds for frequency sweeping down. You can change the warbling frequency of this alarm siren by changing the C1 capacitor value. You can vary the value between 10 uF to 47 uF and get […]
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Dimmer Switch Introduction Dimmer switch can be used to replace your electrical switch for lamps, heaters, or some types of electric motor. Dimmer switches will control the electricity not only for on-off operation, but they are capable of operating somewhere between “on” and “off”. Dimmer switch actually works by switching the electricity on-off rapidly, and the proportion of on and […]
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Sawtooth signal is used in many application, such as in PMW modulator or oscilloscope sweep circuitry. This sawtooth wave generator gives not only the sweep signal at out 1, but also a synchronization output at out 2 when the sawtooth fly back and begin sweeping. The frequency formula of this sawtooth wave signal is: f=R3/(2CR4(R1+R2)) Remember that the real frequency […]
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What is a PLL oscillator? PLL stands for phase locked loop, and this means a control method by comparation of the controlled plant or system to a reference clock or oscillator, that the plant is controlled to synchronize the clock. PLL has been widely implemented in motor control application, to make the motor rotates at very precise speed, even at […]
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