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PWM and power control circuit diagrams
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August 8, 2010
PWM waveforms are commonly used to control the speed of DC motors. The mark/space ratio of the digital wave-form can be defined either by using an adjustable analogue voltage level (in the case of a... [more]
circuit from:http://www.extremecircuits.net/2010/05/discrete-pwm-generator-circuit.html
August 8, 2010
This circuit takes advantage of the voltage drop across bridge rectifier diodes to produce a 5-position variable voltage supply to a DC fan or other small DC motor. It is not as efficient as a... [more]
circuit from:http://www.extremecircuits.net/2010/05/dc-motor-speed-controller.html
August 8, 2010
This handy circuit can be used as a speed controller for a 12V motor rated up to 5A (continuous) or as a dimmer for a 12V halogen or standard incandescent lamp rated up to 50W.... [more]
June 26, 2010
A pulse width modulator (PWM) is a device that may be used as an efficient light dimmer or DC motor speed controller. The circuit described here is a general purpose device that can control DC... [more]
June 22, 2010
The automatic pump controller eliminates the need for any manual switching of pumps installed for the purpose of pumping water from a reservoir to an overhead tank. [more]
June 22, 2010
A DC motor reversing circuit using non latching push button switches. Relays control forward, stop and reverse action, and the motor cannot be switched from forward to reverse unless the stop switch is pressed first. [more]
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