In this tutorial we are going to build a very Simple Intercom Circuit using which you can communicate two ways locally within your house or school. This project brings in the childhood memory of using matchboxes with thread to build a simple telephone. So now let’s take it to the next level by building an electronic circuit (amplifier) to transmit voice from one end to another end.
Frequency Dividers are the circuits which divide the input frequency by n (any integer number), means if we provide some signal of frequency ‘f’ then the output will be the divided frequency ‘f/n’. Frequency dividers are very useful in analog as well as digital applications. Here we are building the circuit to divide the frequency by 2 or 4.
In this tutorial we are making a Temperature controlled DC fan using Thermistor, as it starts above the preset level of temperature and stops when the temperature return to normal condition. This whole process is done automatically.
In this project, we will use Triac to control the brightness of the AC bulb with a IR TV Remote. You can also control Fan speed with your TV remote using this Triac Dimmer circuit.
The name of the circuit itself infers the application. This circuit triggers the alarm if the door of Fridge is left open for the long time.
DIY Stun Gun
Here you can find a detailed tutorial to build your own stun gun with circuit diagram and PCB design files.
Simple LED Circuit for Beginners
Get started with electronics with this very basic circuit build on breadboard.
1W LED Driver Circuit
Design a high power LED driver circuit with current limiting using ICLM317.