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.

light adjustable circuit with IC 4017

The IC-556 works as a pulse generator and feeds the clock pulses to IC 4017th IC 4017 is the heart of this circuit.

 It works like a switch and gives the output after every 10 pulses. It pushes the transistor, which in turn fire the triacs. The triac provides sufficient current to the load.

9 Sec. Timer control Relay circuit

IC 555 timer output at pin 3 will be high and the voltage at pins 6 and 2 of the timer will be a little less than the lower trigger point, or about 3 Vdc. 

That time the switch is opened, the transistor in parallel with the timing capacitor (22uF) is shut off allowing the capacitor to begin charging and the IC 555 timer circuit to produce an approximate one second clock signal to the decade counter. The counter advances on each positive going change at pin 14 and is enabled with pin 13 terminated low. When the 9th count is reached, pin 11 and 13 will be high, stopping the counter and energizing the relay. Longer delay times can be obtained with most capacitor or most resistor at pins 2 and 6 of the IC 555 timer