ABOUT THIS PROJECT
Flashing circuits are very interesting. They grab your attention and can be used in many applications.
They consume very little energy and a single cell can last as long as 12 months.
You can flash globes, LEDs and pulse all types of devices such as motors, solenoids and piezo diaphragms.
They can be adapted for other applications – but to do this you have to know how they work. This is not easy as most of them are quite complex. In fact oscillator circuits are one of the most difficult circuits to understand. But if you read the text, everything will become clear.
YOU WILL NEED :
- 1x – PCB
- 1x – SPDT slide switch
- 1x – 9V battery clip (6f22)
- 9x – 1N4148 or any other general purpose diode
- 6x – LED (whatever color/parameters)
- 1x – 100nF capacitor
- 1x – Potentiometer 500kΩ linear
- 1x – 10 kΩ resistor
- 1x – 2.2 kΩ resistor
- 1x – 8 pin socket
- 1x – 16 pin socket
- 1x – NE555
- 1x – 4017
You can even use a Normal PCB.
This circuit can work on voltages 4.5V to 16V
The integrated circuit NE555 is wired in an astable mode(oscillator) and is used as a clock signal for 4017. The 100nF capacitor(C1) with the potentiometer(R2) wired as an adjustable resistor set the frequency of the oscillation.
The IC 4017 is a 5-stage johnson counter. This may not tell you much so I will try to explain. With each oscillation of the NE555 the counter proceeds to next outup and so on. Just look at the gif and you should Immidiatelly understand.
The LEDs can use just one resistor(R1) because only one LED will be lit at a time.
YOU MADE IT ! 🙂