A simple yet effective infrared based remote controlled fan dimmer circuit can be built using a couple of IC s and triacs, the following articles explains the details.
Sep 28, 2016
This circuit will allow the user to lock his car ignition using his phone Bluetooth, meaning the ignition can be locked/unlocked only through a specific code from the user's cellphone Bluetooth.
Sep 22, 2016
The post explains a simple low cost solar pocket LED light circuit which could be used by the needy and, underprivileged section of the society for illuminating their houses at night cheaply. The idea was requested by Mr. R.K. Rao
The post explains how to make a chasing "WELCOME" display circuit sign board, which illuminates each alphabet sequentially until all the 7 alphabets are lit and then the whole display shuts off, the cycle continues permanently as long as the circuit is powered.
Sep 21, 2016
In this article we are going to learn how to interface air quality sensor MQ-135 with Arduino. We will see overview of the sensor and construct a project which detects LPG gas leakage and see some relevant readings in serial monitor.
Sep 20, 2016
The post details how to make a simple transformer winding counter circuit using ordinary LEDs and also through an advanced digital display circuit. The idea was requested by one of the dedicated readers of this blog
Sep 14, 2016
In this article we are going to construct a GSM fire alert circuit system using Arduino and DHT11 sensor, which will alert the user via text message (SMS), regarding a fire hazard within the premise where it is installed.
Sep 11, 2016
In the previous post we elaborately learned how to design an induction heater circuit, continuing ahead here we learn how to calculate induction heater LC resonance frequency, and its wire current handling capacity.
Sep 8, 2016
The post explains how to use Bluetooth technology for transmitting PWM wirelessly, the circuit application could be used for controlling various appliances such as motors, lights, RC gadgets etc using your Android phone.
Sep 7, 2016
In this post we are going to construct a password security lock circuit, which can be accessed by a 6-digit password. To be more precise it is alpha numeric password.
Sep 5, 2016
In this post we are going to learn how to interface a 4x4 keypad with Arduino. We are going to see what is a keypad, how it is constructed and a how to program the Arduino to receive keystrokes form the keypad and print them in serial monitor.
Sep 4, 2016
Generating electricity from piezo could be as easy as making a flick with your finger..... curious to know how? Let's learn more about this amazing device called piezo, which can be used for generating music as well as electricity.
Sep 3, 2016
In this post we learn how to make a LM317 variable power supply circuit with push buttons for enabling digitally controlled voltage selection. We eliminate the use of mechanical pot and replace it with a couple of push buttons for the up/down selection of the desired voltage levels.