LED roulette wheel kit - SMD version

This simple little kit uses a 555 timer IC to drive a 4017 IC to light one of 10 LEDs in sequence. Note that this is a new smaller version using SMD ICs and other components (with through-hole LEDs, switch etc). You will need a fine tipped soldering iron and reasonably good soldering skills to build this kit.

Press the button and the LEDs start cycling in a circle quite quickly. Release the button and the cycle speed steadily decreases until it stops and a random LED remains lit.

Note: These kits are supplied without instructions, all the info you need to build it is printed on the PCB. Please do not ask for instructions as we don't have them, the kits are supplied by a Chinese manufacturer that only supplies Chinese instructions. However, an approximate circuit diagram appears below, but please use the labels on the PCB for component placement.

Basic specs:
PCB: 40 x 40mm
Supply voltage: 3-5VDC