on video LED Chaser Rain Effect with Bright Trail - NE555 and CD4017 - PCB Tutorial

 LED Chaser Rain Effect with Bright Trail - NE555 and CD4017 - PCB Tutorial

This is a Rain LED circuit using a NE555 and a CD4017. I have divided this circuit into two parts, the first with NE555 generates an (adjustable) frequency which issent to the CD4017 (Pin 3 NE555 to Pin 14 CD4017) The second part of the circuit, with CD4017, manages the LEDs, making them run at a speed set by the frequency that I just told you about (from NE555). LED speed can be adjusted by a 47KΩ trimmer... and in this second version I added some electrolytic capacitors to create a small bright trail effect.

Components:

- 1x NE555 IC

- 1x CD4017 IC

- 1x 330Ω Resistor 1/4 Watt

- 2x 1KΩ Resistor 1/4 Watt

- 1x 47KΩ Trimmer

- 1x 1uF @25/50/100V Electrolytic Capacitor

- 10x 4.7uF @25/50/100V Electrolytic Capacitor

- 1x 8 pin DIP (not mandatory if you solder the IC on PCB)

- 1x 16 pin DIP (not mandatory if you solder the IC on PCB)

- 20x LED 5mm (any color)

- 1x LED 3mm (PWR LED)

- 1x 1N4007 Diode (protection against polarity reversal)

 LED Chaser Rain Effect with Bright Trail - NE555 and CD4017 - PCB Tutorial

This is a Rain LED circuit using a NE555 and a CD4017. I have divided this circuit into two parts, the first with NE555 generates an (adjustable) frequency which issent to the CD4017 (Pin 3 NE555 to Pin 14 CD4017) The second part of the circuit, with CD4017, manages the LEDs, making them run at a speed set by the frequency that I just told you about (from NE555). LED speed can be adjusted by a 47KΩ trimmer... and in this second version I added some electrolytic capacitors to create a small bright trail effect.

Components:

- 1x NE555 IC

- 1x CD4017 IC

- 1x 330Ω Resistor 1/4 Watt

- 2x 1KΩ Resistor 1/4 Watt

- 1x 47KΩ Trimmer

- 1x 1uF @25/50/100V Electrolytic Capacitor

- 10x 4.7uF @25/50/100V Electrolytic Capacitor

- 1x 8 pin DIP (not mandatory if you solder the IC on PCB)

- 1x 16 pin DIP (not mandatory if you solder the IC on PCB)

- 20x LED 5mm (any color)

- 1x LED 3mm (PWR LED)

- 1x 1N4007 Diode (protection against polarity reversal)