Turn-key PCB assembly services in prototype quantities or low-volume to mid-volume production runs

Testing stepper motors with pulse generator

This is a quick portable circuit used to test stepper motors. It is based on small PIC 12f675 microcontroller. The pulse speed is changed with potentiometer. It allows smoothly variate between 20Hz and 3kHz. It has couple jumper bridges to select enable and dir pins. Servo tester is powered with four NiMh rechargeable batteries that give total 4.8V.  This circuit can also be used as general purpose pulse generator if needed. Continue reading

Arduino Based Robotic Wooden Labyrinth Game

Labyrinth is a very challenging game, where you can compete with your family and friends anytime, anywhere you want. However, if you think that it’s quite dull to play the ordinary Labyrinth, then how about this Arduino based robotic wooden Labyrinth game? This project doesn’t cost you too much, where with around $60 or less, you can build a great Arduino Labyrinth. Actually, it’s the ideal project to start with, if you want to learn about robotics. This game is using two servos and an Arduino to turn the knobs for moving the game surface. By the way, if you already have the Xbox360 game controller, then you only need to program it and modify it to suit with the Labyrinth game, instead of buying it on the market. If you decided to expand this project a little bit further, then you would like to build another Labyrinth game platform, by using stepper motors (instead of servos). It must be even more thrilling and exciting to observe the motion detection through a webcam, isn’t it? Lastly, it’s time for you… Continue reading

A Magnificent X-Y Plotter

Do you wish to have an X-Y Plotter, which it operates in two axes of motion (the ‘X’ and ‘Y’) by helping you to draw those continuous vector graphics? Since most of the standard plotters only has one control “Y” axis, this additional “X” axis will bring a big different. Today, you will have the chance to create your very own X-Y plotter, but it does need a little bit modification by yourself. If you have limited budget, you can uses those components that were salvaged from any types of old scanners, but the amount must be in a pair. Those components that needed for this project are: Belts Motors Driver boards Stepper motors When you’re combined all the above components, it will give you a resolution of 16 micrometers per step, which is a whole lot better accuracy than what you expected here. Continue reading