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]
This article discuss how to implement a Brushless DC Motor Controller. It’s not complete yet but gives some literature on the topic. It talks about what a BLDC motors is and what are the methods of controlling such a motor. There will be updates on the progress.
Implementing a Brushless DC Motor Controller – [Link]
This project shows how to build a DIY laser CNC machine using parts from old printers and a CD-ROM. The laser diode using is rated at 1W. With this machine you are able to:
- Cut paper
- Engrave wood and cardboard
- Engrave plastic
- Engrave PCBs etc
DiY: How to build a homemade Router Laser CNC – [Link]
Pulse Width Modulation is the most common way to control the speed of a DC motor. This project describes how to use the hardware PWM built inside PIC12F683 for motor speed control. The PIC12F683 reads analog voltage output of a potentiometer and accordingly changes the duty cycle of PWM wave to set the speed of the motor. Since the PWM duty cycle input is 8-bit and ADCs in PIC12F683 are 10 bits, only the 8 most significant bits from ADC output are used. This gives 256 different speed levels. The software is written in mikroC.
DC Motor Speed Control using Pulse Width Modulation (PWM) – [Link]
Th1, the 50K thermistor, is a standard type. Mine was a bar or rectangular looking thingy. Available from Tandy/Radio-Shack. Almost any type will do. I experimented with different models from 22K to 100K
and all worked fine after replacing the trimmer pot. The one used in the above circuit diagram was a 50K model. This 50K was measured at exactly 25 °C and with 10% tolerance.
Automatic Fan Controller – [Link]