motor

Usual, we just enter the voltage and DC current source to the DC motor, Makes motor can be rotated. If will modify or regulate the speed in rotation of the motor. Wewill need to enter the voltage look into pulses or periodically. Which will makes the average voltage at output is different. By the pulse voltage is high frequency will has the average voltage than the low frequency pulse. The same with the pulse has over duty cycle value, it will has the average pressure much than low duty cycle value.

The working principle.

The average voltage will be supplied to the DC motor. To control the motor rotation is slow or fast. This circuit uses the above principle. By makes the pulse generator circuit or astable multivibrator Which consists of IC1 / 1 and IC1 / 2 inverter gate with C1, R1, R2, VR1 and diode D1, D2. The signal generator has the duty cycle value that can adjustable or can rotate with VR1 there.

The pulse signal of circuit. When is adjusted to get the duty cycle too much there is a maximum of 100%.(signal has the most positive pulse.) Makes the motor it will spin the fastest. If the percentage of the duty cycle reduced, the speed it will reduced as well. The pulse output signal from IC1/2 will enter to Q1(2N3906), Q2(2SC1061) that are connected to the Darlington amplifier circuit. To extend the current pulse up. Then to drive to the the motor, connected to the output terminals of the circuit.

The Q2(H1061) acts through a direct current to the the motor. The selection will need to look in accordance with the current use of the motor. I choose to be more current, because when the motor start to draw more the current from the power supply than the normal rotation. Or not the the motor is loaded. This circuit is suitable for the DC motor with a power that is not much. Is small enough that the voltage and current not exceeding 12 volts 2 amps. Which reduces power loss to the the motor and the circuits.

Source

Expensive stereo is general often have VU meter come to and for help show max power the stereo not too much. For radio tape general plaything has will no VU Meter. I then think to seek Multi meter use can replace. By use Range 100uA and electronics equipment the other again. It have be Potentiometer 10KHZ for fine decorate the rapidity the value deviates full scale. Part diode and Capacitors perform arrange the electric current rectifier from AC to DC Current.
Read more and see circuits at source : http://www.eleccircuit.com/simple-vu-meter-schematic/

Cick to read information

The EasyDriver is a simple to use stepper motor driver, compatible with anything that can output a digital 0 to 5V pulse (or 0 to 3.3V pulse if you solder SJ2 closed on the EasyDriver). EasyDriver requires a 7V to 30V supply to power the motor and can power any voltage of stepper motor. The EasyDriver has an on board voltage regulator for the digital interface that can be set to 5V or 3.3V. Connect a 4-wire stepper motor and a microcontroller and you’ve got precision motor control! EasyDriver drives bi-polar motors, and motors wired as bi-polar. I.e. 4,6, or 8 wire stepper motors. On this version (v4.4) we fixed the silk error on the min/max adjustment.

Read more

This are a lot motor control circuits. you can click link for read contents.

1. PWM Control Speed Motor 12V By TL494
2. Stepper Motor Driver using L298 and L297
3. PWM DC motor control with SG3525
4. DC Motor Driver with L6203
5. A Simple PWM Circuit Based on the 555 Timer
6. Simple DC Motor Control Circuit
7. PWM Speed Motor Controller By IC 555
8. PWM D.C. motor drive Low loss speed control By 4093
9. Touch Motor Control by SCR and Schmitt Trigger
10. PWM Control Speed Motor 12V By TL494
11. PWM Motor Speed Controller – DC Light Dimmer by IC LM324
12. PWM Speed Motor Controller By IC 555
13. Stepper Motor Driver using L298 and L297
14. Stepper Motor Controller by ULN2003
15. Basic Stepper Motor Driver by 74194
16. 74LS194, 74LS04 drive a stepper motor
17. 4013 and IRF510 Easy drive a stepper motor
18. Driving Bipolar Stepper Motors by PIC16F84
19. Simple Stepper Motor Controller by 4027 , 4070
20. DC Motor Driver with L6203
21. RF Dual DC Motor Controller
22. Servo pulse to PWM converter by LM324
23. DC Motor Reversing with Relay
24. PWM DC motor control with SG3525
25. 12V DC Motor Speed Controller by IC 4011
26. DC Servo Motor Driver by PIC16C71
27. Slow Servo
28. Arduino temperature controlled PC Fan
29. A Simple PWM Circuit Based on the 555 Timer
30. Full-featured Dual H-bridge
31. DC Motor Control with TIP31
32. 12V DC motor for Cassette tape speed control

Often we need to use DC Motor 12V. But it is not easy to control. We see the deployment, a wide range of speed control, turn on-off, etc.

DC Motor drive
DC motor controller
DC motor controller diagram

12V DC Motor Speed Controller by IC 4011 This is circuit 12V DC Motor Speed Controller by IC 4011..It is easy circuit and easy to build Low cost too.VR1 for control speed DC motor 12V. …..

Simple DC Motor Control circuit was built to operate a small motor used for opening and closing a pair of curtains. As an advantage over automatic closing and opening systems, you have control of how much, or how little light to let into a room…..

12V DC motor for Cassette tape speed controlReverse engineered circuit diagram of a motor speed regulator out of a line powered Cassette dictation machine containing a single heafty motor for all functions. This circuit works amazingly well, keeping the motor speed constant regardless of shaft load.
Unmarked didoe are silicon so use 1N4148…..

PWM 12V DC motor speed regulator Reverse engineered circuit diagram of a PWM motor speed regulator out of an oral irrigator water pump. This circuit works quite well, keeping the speed of the small PM motor fairly constant regardless of load. No transistor heatsink is required since this is a switching regulator. The efficiency under high load would be a improved if the output transistor was made to switch faster. …

Pulse Width Modulation DC Motor Control by 4011 Often, people attempt to control DC motors with a variable resistor or variable resistor connected to a transistor. While the latter approach works well, it generates heat and hence wastes power. This simple pulse width modulation DC motor control eliminates these problems. It controls the motor speed by driving the motor with short pulses.,….