Dc Motor Driver | Electronic Project Circuits

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Basic Stepper Motor Driver by 74194

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 CLOCK pulses that are fed to PIN 11 of the SN74194 integrated circuit.
#Each time the CLOCK pulse goes HIGH (positive) the HIGH state at the SN74194′s OUTPUT terminals, (PIN’s 12, 13, 14, 15), is shifted either UP or DOWN y one place. Refer to the “Stepper Motor Driver Waveforms” diagram.
The direction of this shifting is controlled by switch S2. When S2 is in the center OFF position the HIGH output state will remain in its last position and the motor will be stopped.

View example about Stepper Motor Driver kit. It is build very easy and inexpensive.

When the base of Q6 is LOW the shifting will be PIN 12 – 15 – 14 – 13 – 12 .etc.
When the base of Q7 is LOW the shifting will be PIN 12 – 13 – 14 – 15 – 12 .etc.
The direction of the pulse shifting determines the direction of motor rotation.
#The pulses from the OUTPUT’s of the SN74194 are fed to four segments of the ULN2003 Driver. When the input of a segment is HIGH, its darlington transistor will turn ON and its OUTPUT will conduct current through one of the motors coils.
#As the coils of the motor are turned ON in sequence the motor rotates to follow these steps. Refer to following diagrams

Read More Source:http://home.cogeco.ca/~rpaisley4/Stepper.html
Thank you.

Be the first to comment - What do you think? Posted by admin - March 19, 2008 at 6:17 pm

Categories: Electronic Control, Motor controller Tags: dc motor driver, drive stepper motor, TTL digital circuit

H-bridge motor driver by TIP120,TIP125

This circuit drives small DC motors up to about 100 watts or 5 amps or 40 volts, whichever comes first. Using bigger parts could make it more powerful. Using a real H-bridge IC makes sense for this size of motor, but hobbyists love to do it themselves, and I thought it was about time to show a tested H-bridge motor driver that didn’t use exotic parts.

Read More Source:http://www.bobblick.com/techref/projects/hbridge/hbridge.html
Thank You.

Be the first to comment - What do you think? Posted by admin - February 22, 2008 at 11:35 pm

Categories: Electronic Control, Motor controller Tags: dc motor driver, H-bridge, motor controllers

Simple Miniature Motor Controller by LM317

I got this from a dosing pump control circuit.
we use cool IC is no. lm317 circuit, It can uses with power supply source 24VDC and adjust voltage output 1.25V to 24V for DC motor 24V.
It is really simple motor control circuit. because there are a few parts and easily to build.