Stepping motor Driver Circuit

This circuit is a continuation of easy to build desk top 3-axis CNC milling machine as soon as you go along time.
So it’s time to take the bikes. And here I was a track that I think is the absolute cheapest and easiest way to stepper motors with step and direction control signals received. It works with many free or inexpensive software to the step and direction signals through the parallel printer port to produce. I’ll explain how it works, but for those of you who just want to work … The_Next_Step

But I suggest that you are not using circuits to do it on a breadboard (see photo). In this way, can easly correct any errors and try different things.

This scheme is only one engine so you should check for the mill of those three counties and three engines.
From left to right and from top to bottom. I’m trying to plan such that positive voltages are up and pull on the ground or negative, followed by down. Inputs on the left side and outputs on the right. Fist of the voltage you will use the engine to run needs to be strengthened and opted for the logic chips. I used a 6.2 volt Zener do this because the low enought for logic chips on the signals of your printer port and a high enough power to drive to get many of the standard power FETs, it may not be the logic of FETs as the schedule shows are used. So the resistance R1, the voltage regulating Zener diode to 6.2 volts and the capacitor C1 filters out any noise from the engine, and this voltage powers of the two ICs.
The first IC (CD4049) is called an up / down counter. A signal from the printer port will show the counter to count up or down and the other signal, called step increases or decreases the counter by one count. Now there were only two exits to the counter Q1 and Q2. This binary counting, only four combinations of the output of the counter: 00, 01, 10 and 11 These lines are routed to the inputs A and B of the other IC (CD4017), which decodes these combinations to 4 seprate outputs.
I have a trick by the C function as input enable input. When the switch (optional) is connected to the parallel port and the computor it says all outputs of the FETs in the vicinity go low (off). So the four outputs of the decoder driving the FET transistors and FETs drive the four poles of the motor.
Now everyone wants to know the lamp is on. It’s not whether you are a lamp or a heating element, a lamp, which comes with an AC outlet. You can base bulbs from 1 watt to 20 watt wedge. Start with perhaps a 4-watt light bulb, and if you are a bit more beef, you simply pull out and a 10 watt light bulb. It is really convenient. And I found that it is good to get some voltage loss is as a kind of ballast for the motor windings. The diodes to capture a share of power that comes from the engine every time the AC FET transistors. The diode current that feeds back into the offer.
If you track and runs on a diet that really need more stress than you shall find and then change light bulbs that are smooth. Some of my stepper motors have 5 or 6 volt and some are 12 volt, but it all works.

Fan speed control circuit

speed motor for fan or other equipments.

The simple concept project is use IC CD4017 to control 4 relays which connect each pole.

IC CD4017B which is counter-cum-1kHz decoder and the signal is divided into ten equal intervals,  Which can be programmed, via the single location, 10-mode. According to the late publication of the duration of the interim period,  the corresponding output of the CD4017 inhibits counter CD4017 (per pole of rotation and diode D6), and fires the triac.
Here transistor T2 acts as a driver transistor. Pin by 4017, with zero at the output of the sensor for the switch to 0(zero detect output) each pass through zero.
Remark. The current wave forms of certain positions of the rotary switch, as stated in EFY Lab are in the picture 1.
The circuit is able to apply for a controller in the energy lighting equipment, hot air, oven singal Universal AC motor, heating, etc.

stepper motor controller circuit

I had immediately into my document. I do not know where it came from, but it seems that I photocopy a few years.

I think it should be very helpful, so I decided it here. The circuit is very simple and inexpensive. It is a good thing, since most lines step motor controllers are very expensive. The circuit is made of standard components and can easily be adjusted by a computer. If you cheap surplus transistors and stepper motor, the price of the circuit can be less than $ 15.

     This stepper controller circuit shown here can used to control the unipolar stepper motor,
which has 4 coils . The stepper controller circuit can drive for a motor current of up to about 500 mAmp/Winding by suitable heat sinks for the SL-100.
      In higher currents power transistors seem 2N3055 can be used as darlington pair along with SL-100. All diodes are used to protect back current the transistor from transients.

*** Remark ***

• You may be able to substitute any standard (2N3055) power transistor for Q1-Q4 or

get IC type UL to modify for transistor.

• Every time in move the motor put signal the STEP line is pulsed, the motor moves one step.
• Switch S1 for changes the motors direction