This is running LEDs circuit which use timer ID NE555N and logic IC 4017N. IC 555 act as a multivibrator and generate frequency to be […]

This is a sound generator based on general purpose timer IC 555. A flip-flop circuit is included, so this circuit will give sound output and […]

This is the circuit diagram of dancing LEDs which consists of 10 units LEDs. The 10 dancing LEDs circuit works like a audio level meter. […]

Here the analog flip-flop circuit which built based on 2 transistors work as switch. This is very easy made and very cheap circuit. You can […]