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This article covers the 3 main types of motors which are used in robotics namely the DC motor , Stepper motor and the Servo motor. The article also gives various circuits which can be used to drive the motors . This article is a must for all those starting out or are confused about motors .
Nearly all the robots we make have motors be it servo , stepper or some other unless you are using stuff like pneumatics , synthetic muscle etc . Any way coming back to the point there are mainly 3 types ...

I wanted a single sided motor shield which would allow me to control a few servos and 2 DC Motors. All this while allowing easy sensor interfacing. The shield had to be single sided and DIP for DIY.

The shield given below is the result for the same.



Some Features -

• Dual DC Motor support with PWM
• Servo motor support
• DIY Single sided PCB
• Easy sensor interfacing
• Stackable

Ideas for improving it are ...

Tags: arduino, arp, motor, riduino, servo, shield

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Piezo speakers are quite fun components. They can play as well as detect frequencies. The basic idea behind making them play tunes is to send a "Square wave" of the corresponding frequency. By Square wave, I mean , the HIGH and LOW time should be equal.

How do we get the high and low time out of note frequencies?
High time = Low Time = 1/(2*NoteFrequency)

For Example, a basic C note (western musical notation) is 261 Hz. (http://www.phy.mtu.edu/~suits/notefreqs.html) ...

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I remember the technical fest at NIT calicut some years ago. must be two or three. I checked out the robot soccer competition. I was not very surprised, every one had the same old toy gear set, ripped off from the famous 'earth mover' toy, wire controlled. I could hardly find ANY electronics. It was not a good sight at all. Something is terribly wrong. Somewhere. One of my students, i think the same year, made a painfully slow line follower cum obstacle avoider. I remember ...

What is PID?

Ok so what is this PID and why is it much talked? Well, PID means proportional–integral–derivative and it is a control feedback method applied in different control systems, its main task is to minimize the error of whatever you are about to control. It is superior quality error control feedback mechanism and the general industry standard. Speaking simple it takes in the inputs ...