The HK9935 is a 12-channel LED chaser module based on a PIC microcontroller, designed to create dynamic scanning and chasing light effects.
It features 5 different programs, including effects such as Knight Rider Scanner, GhostBusters, Proton Pack Power, CYLON EYE and others, making it suitable for decorative lighting, movie props, models, and electronic hobby projects.
Program selection is done via a push button, while the effect speed can be smoothly adjusted using an onboard trimmer potentiometer.
A non-volatile memory stores the last selected program and automatically restores it after power cycling. The compact PCB is available in different versions depending on the type and color of the LEDs used.

Technical Specifications:
Microcontroller: PIC.
Channels: 12.
Number of programs: 5 + demo program.
Demo mode: automatic cycling through all programs.
Effects: Knight Rider Scanner, GhostBusters, Proton Pack Power, CYLON EYE and others.
Control:
- program selection button,
- speed control via trimmer potentiometer.
Memory: non-volatile (stores last selected program).
Supply voltage: 8 - 14 V DC.
PCB dimensions: 102 x 35 mm.

Variants
The product is available in different versions depending on:
- LED size - 5 mm and 2x5x7 mm.
- LED color - white, yellow, red, green and blue.

This product is a fully assembled module.

Video with 5mm LEDs: 

Video with 2x5x7mm LEDs: