Like in previous post on Automobile Engine Overheat Alert Circuit using LED, where driver gets indication through LED, but in this circuit, driver gets alert through sound and this sound comes from IC 555, which works as astable multivibrator and generates sound signal, also we can adjust temperature level for alarm using variable resistor which […]
Indicator Circuits
Random LED Number Generator Circuit
This circuit is for simple Random LED Number Generator Circuit using IC CD4017 decade counter and IC CD4011 NAND gate. It works on 9V power supply and the LEDs in the circuit represent the numbers. When we press the switch, one LED remains ON, because the counter runs very fast and the final LED looks […]
Simple Over-Temperature Warning Indicator Circuit
This circuit is for Simple Over-Temperature Warning Indicator Circuit using an LED. It is very simple and is with low cost as it uses few easily available components. The circuit turns ON an LED when temperature rises above a set level like 45°C – 55°C. Therefore, it is useful for basic thermal warning. This circuit […]
Transistor Based Water Level Alarm Circuit
Sometimes water tank gets full which is a common problem But we forget to switch OFF the motor, because of this water gets wasted. So, this simple Transistor Based Water Level Alarm Circuit is useful. It gives sound alert when water reaches a level. Moreover, the circuit is cheap and easy to build as it […]
Transistor Based Coin Toss Game Circuit
Sometimes we need to make a quick decision but choosing is not easy, so we flip a coin. Now imagine doing the same with electronics. This Transistor Based Coin Toss Game Circuit works like a real coin toss and it gives random result every time. When power is applied, no one knows the result. One […]
Digital Dice Circuit using Arduino Uno
Want to roll dice without touching it? Make Digital Dice using Arduino Uno and with a LCD screen. Press the button to get random number 1 to 6. It works like real dice but uses electronics. This is a simple and easy circuit. Its a fun project for beginners. Arduino Coding: Circuit Working: Parts List: […]