ATTiny85 Raindrop LED Light

8 channel raindrop LED chaser based on ATTiny85 at 1 Mhz

Roger Rabbit

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Description

This is a fun project to build a raindrop light with am ATTiny85 and its restricted ports.
But it turned out to work pretty good.
I have ordered a PCB to hang on the X-Mas tree :)

Details

I always loved these X-Mas lights which look like a raindrop.

I just wondered, how they are working. First I thought of using a decade counter. Long time ago I build a night rider light with such a component. This time I wanted to use the ATTiny85, inspired by HAZE TECH's led chaser.

BTW: this is a different but neat way to approach the challenge:

https://tronicspro.com/rain-drop-led-chaser-electronics-project/

Files

LED_Raindrop_Fast.ino ino - 3.21 kB - 11/30/2023 at 09:54		Download
20231128_123502.mp4 MPEG-4 Video - 6.28 MB - 11/30/2023 at 09:53		Download
LED_Raindrop_v3.2.ino Ardunino code for the ATTiny85 project ino - 3.18 kB - 11/22/2023 at 10:00		Download
20231122_054238.mp4 another demo MPEG-4 Video - 1.85 MB - 11/22/2023 at 09:53		Download
20231120_161755.mp4 a small demo, how it works on the breadboard MPEG-4 Video - 347.88 kB - 11/22/2023 at 04:13		Download

Components

1 × ATTINY85-20PU Microprocessors, Microcontrollers, DSPs / ARM, RISC-Based Microcontrollers
8 × LED 5mm round yellow (through-hole)
1 × IC Socket DIL 8 (optional)
1 × Slide switch (mini) through-hole
1 × CR2032 battery holder

View all 7 components

Project Logs

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JLCPCB
Roger Rabbit • 11/27/2023 at 09:02 • 0 comments

Hope that the PCBs will arrive soon.
Latest gossip
Roger Rabbit • 11/22/2023 at 04:24 • 0 comments

I just updated the Arduino sketch. I wonder if it could be written even more efficient?