Indicator Circuits

Digital Dice Circuit is small electronic like thing. It work like real dice and shows number from 1 to 6. It uses lights and buttons which is no need to throw. This circuit is good for games and fun. Circuit Working: Parts List: Component Type Value Quantity Resistors (All resistors are 1/4 watt) 1k 2 […]

This for Low Battery Indicator with Buzzer Circuit is very simple and uses basic idea and few parts. Buzzer make sound when battery is low and warn us. It help us to know when to change the battery so device do not stop suddenly. Circuit Working: Parts List: Component Type Value Quantity Resistors (All resistors […]

This Simplest Blown Fuse Indicator Circuit shows if fuse is good or bad without checking it by hand. If fuse is okay then green LED turns ON. If fuse blows then green LED goes OFF and red LED turns ON. That means fuse is bad and needs to change. Circuit Working: Parts List: Component Description […]

Reed switch is small switch which works with magnet. When wire is near it has current and it makes magnetic field. This magnetic field make reed switch turn ON or OFF depends how it is made. It help to know if current is there. Circuit Working: Parts List: Component Type Description Quantity Resistor 470Ω 1/4 […]

This Simple LED Voltmeter Circuit is like small battery checker but with cool lights. Not like phone bar this one is used in many tiny lights like LEDs to show how much battery is still there. More lights turn ON when battery is more full and each light become ON at different voltage. It also […]

This Simple Water Level Indicator Circuit using IC ULN2004 work like small helpers for our water tank. It uses one special chip named as ULN2004 to control many things together. This chip can work with big electricity but here it only control lights. The lights show how much water is inside the tank. So with […]