This project is a full and half wave stepper motor controller based on Sanyo STK672-110. A switch controls the rotation direction of the motor and pulses input on pin 9 is required to make the motor run. Also there is a pin for selecting the mode as full or half step. Chech schematic on the link below.
Full and Half Stepper Motor Controller with the Sanyo STK672-110 – [Link]
SEGFAULT is a balancing vehicle with a 100% hardware stability controller. Not a single line of code runs to keep the vehicle upright. An analog complementary filter implemented with operational amplifiers combines the outputs of an accelerometer and rate gyroscope and passes it to a proportional-integral (PI) compensator.
The output of the PI compensator has a steering offset differentially added to it. The resulting analog voltage is the input to two custom 24 volt, 30 amp locked-antiphase H-bridge drivers (Class D amplifiers), which control the two 27:1 geared, 500 watt drive motors.
The vehicle frame is waterjet-cut aluminum and diamond-plate aluminum, and features a tiltable handlebar for steering input. Lastly, the P, I, and K controller gains are accessible and tunable by the user through a set of knobs on the handlebars.
Segfault – analog balancing scooter – [Link]
This project shows how to implement an Electronic Speed Control (ESC) for controlling brushless DC motors. The design is based on an Arduino Duemilanove. To make a Brushless DC motors to work you have to use a motor controller to produce a three phase DC square wave. The test circuit uses 6 2N2222 transistors and six LEDs to help you notice which transistor is switched. Check details on the link below. [via]
This project is a temperature controller that is able to control a fan according to temperature. It’s a simple design and uses simple components. Check schematic and PCB on the link below.
0C to 150C Temperature controller – [Link]
This project shows how to build a cold coffee (frappe) Machine using plain build materials. On the pages below “Giorgos Lazaridis” describes the procedure of building the coffee/sugar tanks, the raising/lowering mechanism that will blend the coffee and the rotaing glass table. He has to overcome many challenges to achieve his goal and he describes all them in his website. This project is under development.
Instant Cold Coffee Machine – [Link]
This project is an analog PWM servo control. It details the design of an op-amp based, analog oscillator that can produce hobby servo control signals based on any analog input (be it a potentiometer, DAQ card, or something else). Check details on the link below.
Pure Analog Servo Control – [Link]
Follow this wiki to learn how to build your own CNC milling machine with cost less than 100$.
3-axis CNC milling machine for 100$ – [Link]
The project is “Motorized Curtain” with Remote control. It is made up of MCU ATMEGA328 with Arduino BootLoader, motor driver L293D ( i used L293B with external diodes, because i couldn’t find L293D ), IR Receiver TSOP 1738, DC Motor from an old printer and other small parts.
Motorized Curtain with Remote control – [Link]
This project is a servo tester based on PIC16F690 and with code written in C. The timing loop is a crude one relying on a simple tight loop, so the pulses are not massively accurate.The board has four modes of operation, selected using TACT switches with the status indicated on LEDS built into the switches .
Servo Tester Module – [Link]
This article discuss the way to control a Stepper Motor using the Parallel Port of the PC. The parallel port signal is controlling the speed, the direction and the step size of the motor. [via]
If you are interested in robotics, motion control, or just want to learn about this widely used motor in almost every electronic gadget like floppy drives, printer, scanner, robots, every device; then you should try building this versatile stepper motor control.
Stepper Motor Control through Parallel Port – [Link]