12v speed controllerdimmer
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Dc-motor-drive-with-fixed-speed-control
The NE5561 provides pulse-proportional drive and speed control based on DC tachometer feedback. This simple switching circuit consists of a 2N4920 PNP transistor with a commutation diode, which is used to deliver programmed pulse energy to the motor. A frequency...
Pwm-motor-controller
The PWM controller utilizes complementary half-H peripheral drivers SN75603 and SN75604, featuring totem-pole outputs rated at 40 V and 2.0 A. These drivers effectively configure the motor in a full-bridge setup, enabling bidirectional control. Timer U1 operates in astable mode...
Direction and speed control for series-wound motors
The circuit can control the speed and direction of rotation of a series-wound DC motor. Silicon controlled rectifiers Q1-Q4 are arranged in a bridge configuration and are triggered in diagonal pairs. The selection of which pair to activate is managed...
Light dimmer
This dimmer is designed to adjust the brightness of incandescent bulbs from zero to maximum. It achieves regulation from zero using a double delay circuit. The circuit is connected with two terminals, allowing for installation into a switch box without...
Speed-controlled-reversible-dc-motor-drive
The figure illustrates a reversible DC motor drive application with adjustable speed control. The D inputs for these drivers are complementary and can be tied together and driven from the same logic control for bidirectional motor drive. The enables are...
12V DC power supply circuit
12V DC power supply circuit. A typical 12V DC power supply circuit includes a transformer that converts mains voltage to the required 12V AC output. It features a full-wave rectifier and a capacitor filter. The circuit typically incorporates a series...
12V Speed Controller/Dimmer
This circuit functions as a speed controller for a 12V motor with a continuous rating of up to 5A or as a dimmer for a 12V halogen or incandescent lamp rated up to 50W. It adjusts the power to the...
12V Auto-Powered Circuit For Cassette Recorders
A regulator enables the powering of a 7.5-V cassette recorder or other devices from a 12-V DC automotive system. The circuit can provide approximately 600 mA of current. Q3 requires a heatsink due to its potential to dissipate up to...
pulse width modulated (PWM) controller for high current
The second 555 timer was configured as a monostable circuit, commonly referred to as a one-shot since an output pulse only occurs if there is a trigger on the input. When this timer is triggered, the potentiometer in the RC...