WARNING: This video contains rapidly flashing LED lights.
This video shows me assembling a 81 LED Chasing Light Kit (CHA-81). Kits are available from AliExpress for between £2.50 and £3.
www.aliexpress...
The kit is powered by a USB cable at 5 V and uses two CD4017 decade counters and two NE555 timers to scan across a matrix display made up of 81 LEDs.
CD4017 datasheet: www.ti.com/lit...
NE555 datasheet: www.ti.com/lit...
The counters control the LED display by means of 18 transistors. By clocking the counters at different rates interesting patterns can be produced on the LEDs. The X and Y axes can be controlled independently using a combination of switches and rotary potentiometers.
353 connections. One take. No cuts. But lots of acceleration!
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n.b. In the video I incorrectly refer to the 220 ohm resistors as 220 K.
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