LED is small light. It uses less power and gives more bright. There are many type LEDs like normal, high power, RGB, SMD. Each type are used in different place like TV, torch, display and decoration. Today LED is very important in human life. Working Principle of LEDs: LED work on semiconductor principle. Inside LED […]
Transistors Based Megaphone Circuit
Transistors Based Megaphone Circuit uses transistor like amplifier. Take weak sound from MIC and makes loud sound in speaker. It is used in public talk, sports, rally anywhere we need loud voice. The circuit have two TIP32 transistor in push-pull to boost sound. It work with 12V battery or 12V DC power. Circuit Working: Parts […]
Adjustable Thermostat Circuit using IC LM56
Electronic adjustable thermostat control temperature and it is used in heating or cooling system. This Adjustable Thermostat Circuit using IC LM56 is a low power chip which switches temperature in two ways. It controls outside transistor for output load. IC LM56 give reliable, precise temperature control. It is good for many uses like check temperature […]
Simple 555 Timer Based Animal Repeller Circuit
Simple 555 Timer Based Animal Repeller Circuit is small device to keep animals away. It make high sound which animals do not like and humans mostly do not hear it. Main part is IC 555 timer which make high frequency sound. Sound is around 15 kHz to 120 kHz (ultrasonic). This circuit is easy to […]
Timer Based Mosquito Repeller Power Saver Circuit
Mosquito repellers are popular to keep bugs away. They use ultrasonic sound or chemical spray. But if it is always ON then they use much electricity. To fix this a Timer Based Mosquito Repeller Power Saver Circuit is made. It turns repeller ON and OFF at set times by saving power. This also keeps repeller […]
Simple LED Alert for Telephone Off-Hook Detection Circuit
This Simple LED Alert for Telephone Off-Hook Detection Circuit shows when phone is in use by turning ON the LED. It checks voltage change when handset is lifted means off-hook. Circuit is good for old phones with no light alert. It is very useful for shared phones and stops call interruptions. Circuit runs on simple […]