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A GSM module and Arduino based dog feeder circuit is discussed in this post. The system can be used for operating a dog feeder mechanism through the owner’s cellphone whenever it may be required. The idea was requested by Mr. Allan Guillermo through one of his comments Introduction Although all domestic animal species are lovable, … Read moreCellphone Controlled Dog Feeder Circuit
You will find this LED resistance calculator very useful for calculating the exact value, power, dissipation of a resistor for the selected LED. This tool will also allow you to calculate the resistor for many LEDs in series by assessing its total forward voltage drop value. The software will also enable you to calculate resistors … Read moreLED Resistor Value and Wattage Calculator Software
In this post we learn how to build a homemade LED driver with dimmer and charger circuit for illuminating a 3D moon from a 5V USB source. The idea was requested by Mr. John Sweden. Circuit Objectives and Requirements I’ve been a visitor to your website for many years and wonder if I may ask … Read more3D Moon-Sphere LED Driver with Charger and Dimmer Circuit
In this post we are going to construct a car robot which can be controlled using a joystick on 2.4 GHz wireless communication link. The proposed project is not only made as a RC car, but you can add your projects such as surveillance camera etc. on the car. Overview The project is divided in … Read moreJoystick Controlled 2.4 GHz RC Car Using Arduino
In this post we are going to construct a circuit which can detect color and trigger respective assigned relays. This project is accomplished using TCS3200 color sensor and Arduino board. Color Sensing by TCS3200 If you haven’t read the previous article, please go through it where we have discussed the basics of color sensing using … Read moreColor Detection Controlled Relay Switching Circuit
In this post we are going to construct a password based mains ON/OFF switch circuit, which can turn ON and OFF the AC mains supply, only when correct password is entered. This prevents the danger of electrocution of the technician who might be currently working with the high voltage lines and equipment. Password Protection for … Read morePassword Controlled AC Mains ON/OFF Switch