Battery Status Indicator Circuit using Flashing LED is an easy to make project. Circuit uses BC547 and BC557 transistor, some resistors, capacitors, one diode and one LED. LED show battery condition by blinking light. It work with 6 to 12V battery and it is easy way to know battery health and it ensures it works […]
Indicator Circuits
Simple Audio Level Indicator Circuit using IC LM3915
Simple Audio Level Indicator Circuit using IC LM3915 show sound strength with lights. Its display driver is good for sound visual circuits. It takes analog voltage and can light up 10 LEDs, LCDs or other displays in line. Here LED VU meter is used. Music lovers like it because it show sound level with lights. […]
Simple Decimal Counter Circuit
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
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
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 […]
Logic NAND Gate Circuit using Transistors
Logic 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. Truth Table for Logic NAND Gate: Input A Input B […]