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42V 2.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current - 11/26/13 EDN-Design Notes Measure inductance & capacitance over a wide range. The LT8610 and LT8611 are 42V, 2.5A synchronous step-down regulators that meet the stringent high input voltage and low output voltage requirements of automotive, industrial, and communications applications. To minimize external components and solution size, the top and bottom power switches are integrated in a synchronous regulator topology, including internal compensation. The regulator consumes only 2.5μA quiescent current from the input source even while regulating the output. Design by Hua Walker Bai
555 stepper pulse generator - The 555 Stepper Pulse Generator kit will help you with the pulse required to drive your favorite stepper Motor driver. This kit uses the populer 555 timer IC for generating the Stepping Pulse. it has two range low frequency and high frequency __ Designed by © 2008, Leiterplatten Zubehör und Reflow-Kit Beta LAYOUT
68HC11 Read Encoder - The encoder is connected to PORTA PA0 and PA1 -- The board must be in BOOTSTRAB MODE (tested with Loggyboard) __ Designed by Ludwig Orgler-Fachingenieur Elektrotechnik
68HC11 stepper Motor control - Simple circuit with 16-pin Nitron chip 68HC908, easy analog setting, source code with IC C08. New s-record for 8-pin 68HC908QT2! __ Designed by Ludwig Orgler-Fachingenieur Elektrotechnik
68HC11 Synthesizes Accurate Sine Wave - 09/02/96 EDN Design Ideas: You can use a 68HC11 and a 12-bit serial DAC (Figure 1) to generate accurate sine waves without using floating-point arithmetic. Figure 2 shows a block diagram for this sine-wave generator. You can easily analyze the generator's behavior by writing state equations in the z domain. You can also write equations in the
domain. The location of the two poles Design by Mika Maaspuro, Espoo, Finland
6-transistor H-bridge - This issix transistor "Tilden style" H-bridge; while not as old asoriginal "basic H-bridge, " this goes "way back, " and is sbasis for many BEAM driver circuits __ Contact Bruce Robinson
80C31 Stepper Motor Controller - The MD4 is a stepper motor driver design utilizing the 80C31 microcontroller. The design is very similar to the MD-2 stepper motor driver board except that this board has an on-board +5V regulator so it does not require a dual voltage power supply to run. it uses two Allegro UDN2540B ICs to driver the stepper motors. The U1 is 8031AH microcontroller which can be replaced with any 80C32, 87C51, 87C52 or flash base microcontroller 89C51, 89C52 families. __ Designed by www.wzmicro.com
A worked Stepping Motor Example - Perhaps some of the most commonly available stepping motors, for the experimenter, are the head positioning motors from old diskette drives. These can be found at electronics swap meets, in computer surplus outlets, and even in trash dumpsters. in addition to a stepper, a typical full-height 5.25 inch disk drive includes a 12 volt DC motor with tachometer and motor control circuit board, two microswitches, and a matched LED-photosensor pair (schematic design 6/06) __ Designed by Douglas W. Jones
Astable Multivibrator Lights LED From a Single Cell - 08/21/08 EDN Design Ideas: A classical multivibrator drives a step-up inductor to power an LED from a single cell Design by Luca Bruno, ITIS Hensemberger, Monza, Lissone, Italy
AT89c2051/4051 Stepper Motor Interface - M1 is a stepper taken from an old disk drive. There are five pins, i. e. , common, coil 1, 2, 3 and 4. Resistance measured between common pin and each coil is about 75 Ohms. Driving current for each coil is then needed about 60mA at +5V supply. A darlington transistor array, ULN2003 is used to increase driving capacity of the 2051 chip __ Designed by Wichit Sirichote
Basic Stepping Motor Controls - This section of the stepper tutorial deals with the basic final stage drive circuitry for stepping motors. This circuitry is centered on a single issue, switching the current in each motor winding on and off, and controlling its direction. The circuitry discussed in this section__
BEAM Stepper - 74AC240-based circuit to drive small bipolar stepper motors (e. g. , ones in floppy drives) __ Designed by Wilf Rigter
BEAM Stepper drive - The 74AC240 stepper driver works by alternately enabling each half of the buffer. Only one half can be enabled at a time. Let's assume that the top half of the driver is enabled. U1A & U1B along with R8, C1, and the input protection resistor R7 form a square wave oscillator. The outputs of U1A & U1B directly drive one coil of a bipolar stepper motor. __ Designed by Duane Johnson and Wilf Rigter
Bipolar Stepper Motor Control - First, we want to explain how such a controller works and what’s involved. A bipolar motor has two windings, and thus four leads. Each winding can carry a positive current, a negative current or no current. This is indicated in Table 1 by a ‘+’, a ‘–‘ or a blank. A binary counter (IC 1) receives__
Bipolar Stepper Motor Control - in this circuit, a potentiometer controls both the speed and direction of a small bipolar stepping motor like those found in many 5 1/4" floppy disk drives. Note that the bipolar motors are distinguished from "unipolar" types, in that bipolar units have two coils instead of four, and four wires instead of five. With the potentiometer at the extreme counterclockwise position, the motor runs counterclockwise at the maximum speed. Rotating the potentiometer toward the center slows the motor, until it stops. Continuing potentiometer rotation clockwise, the motor starts to run clockwise, increasing in speed to the maximum clockwise position __ Designed by Arthur Harrison
Cheap Stepper Motor Driver - Schematic only, no circuit description included __ Designed by Tom McQuire
Circuit Controls Isolated 12V Stepper Motor - 09/26/96 EDN Design Ideas: Allows full direction and step control of a12V, four-phase stepper motor from a5V, TTL/CMOS
-compatible logic controller. Design by Martin O'Hara, Newport Components Ltd, Milton Keynes, UK
Circuit Controls Slew for Stepper Drive - 03/14/97 EDN Design Ideas: The circuit in Figure 1 provide as slewing control for stepper motors that you use in sophisticated applications, such as monochromator movements in optical experiments. The LM331 VFC plays a vital role in this circuit. The constant 10V dc from the IC 9596 voltage reference routes to the VFC through the DG303 CMOS
switch. The DG303's Design by J Jayapandian, IGCAR, Tamil Nadu, India
Circuit controls stepper-motors - 01/08/04 EDN Design Ideas: Stepper motors are useful in many consumer, industrial, and military applications. Some, such as personal-transportation systems, require precise speed control. Stepper-motor controllers Design by Noel McNamara, Analog Devices, Limerick, Ireland
Circuit Smoothly Drives Stepper Motors - 05/28/09 EDN Design Ideas: Adding an analog switch make the motor bidirectional - The circuit in This design idea drives low-power, unipolar stepper motors using only a shift register, a few resistors, and low-power transistors. Adding an inexpensive 4053 an Design by Uwe Schüler, Institute of Physiology, Tübingen, Germany
Control Isolated 12v Stepper Motor - 09/26/96 EDN Design Ideas: Allows full direction and step control of a12V, four-phase stepper motor from a5V, TTL/CMOS
-compatible logic controller. Design by Martin O'Hara, Newport Components Ltd, Milton Keynes, UK
Control Slew for Stepper Drive - 03/14/97 EDN Design Ideas: The circuit in Figure 1 provide as slewing control for stepper motors that you use in sophisticated applications, such as monochromator movements in optical experiments. The LM331 VFC plays a vital role in this circuit. The constant 10V dc from the IC 9596 voltage reference routes to the VFC through the DG303 CMOS
switch. The DG303's Design by J Jayapandian, IGCAR, Tamil Nadu, India
Control Stepper Motors In Both Directions - 03/18/10 EDN-Design Ideas:Logic signals turn motors on and off and change direction. Design by Vladimir Rentyuk, Modul-98 Ltd, Zaporozhye, Ukraine
Control stepper-motors - 8-Jan-04 EDN Design Ideas: Stepper motors are useful in many consumer, industrial, and military applications. Some, such as personal-transportation systems, require precise speed control. Stepper-motor controllers can be simple (Figure 1) , but they require a variable-frequency square wave for the clock input. The AD9833 low-power DDS (direct-digital-synthesis] IC with an on-chip, 10-bit DAC is ideal for this task, becaus Design by Noel McNamara, Analog Devices, Limerick, Ireland
Controller for Stepper Motor using 4027 flip-flop & 4070 XOR gate - I found this circuit in my files. I don't know where it came from, but it looks like I photocopied it from somewhere years ago. I have been told that it came from "The Robot Builder's Bonanza", by Gordan McComb. Anyway, I thought that it should be fairly useful, so I decided to post it here. The circuit is very simple and inexpensive. This is good thing because most commercial stepper motor controller ICs are quite expensive. This circuit is built from standard components and can easily be adapted to be controlled by a computer. if you use cheap surplus transistors and stepper motor, the price of the circuit can be kept to under $10. __ Designed by Aaron Cake
Controlling a Stepper Motor using a Rotary Encoder - Presented here is a project to control a stepper motor using an incremental rotary encoder. it consists of a Raspberry PI (Raspi) board, 5-pin rotary encoder, 5V stepper motor and an...__ Electronics Projects for You
Controlling Stepper Motor with a Parallel Port - This is an easy to build stepper motor driver that will allow you to precisely control a unipolar stepper motor through your computer's parallel port. With a stepper motor you can build a lot of interesting gadgets such as robots, elevator, PCB drilling mill, camera panning system, automatic fish feeder, etc. if you have never worked with stepper motors before you will surely have a lot of fun with this project. __ Designed by Electronics-DIY
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