Indicator Circuits

In this article for Simple Decimal Counter Circuit instead of count in binary (0 to 1) the decimal counter count in base is 10 (0 to 9). One simple and main way to make it: Use Decade Counter IC which is good for beginners. The IC like 4017 is easy to find and can already […]

Automobile Brake Failure Indicator Circuit is backup system. It tell driver if brake system have a problem. It uses electric parts to check brake and if problem comes then it show light or make sound. This circuit work only in cars with negative grounding. It also give signal if brake switch does not work. In […]

24V Flasher Circuit can ON-OFF 24V thing like lightbulb again and again. Can use to turn signal or warning flash light. This circuit uses IC 555 is common for making timer or flasher. We can change flash speed by adding resistor and capacitor to IC 555. This way is not so flexible but easy. Also […]

Simple NAND Gate Circuit using Transistors is very important in digital logic. It work opposite of AND gate. Output is HIGH when any input is LOW. NAND gate is called “universal gate” because we can make all other gates like AND, OR, NOT using it. Circuit Working: Parts List: Component Type Description Quantity Resistors 10k […]

This project is Simple Traffic Signal Lights Circuit using IC 555. It uses 555 IC and LEDs to show traffic signal lights in sequence. The circuit is simple to build and parts are easy to find. Circuit Working: Parts List: Category Description Quantity Resistors 470Ω, 100k, 47k 1/4 watt 1 each 220Ω 1/4 watt 2 […]