Product overview A set of three identical DIY chaser light soldering kits featuring the NE555 timer and CD4017 decade counter. Each kit is designed to produce a sequential LED chase pattern and to teach basic throughhole soldering and circuit concepts in a compact, handson format. Key benefits Learn by doing: Teaches practical soldering skills and basic electronics through assembling a working circuit that demonstrates timing and counting functions. Clear circuit behavior: NE555 provides a stable clock pulse and CD4017 translates that pulse into a visible LED sequence, making circuit operation easy to observe and understand. Ready for projects: Assembled or assembled kits serve as functional chaser modules that can be integrated into hobby projects, model displays, and visual indicators. Three kits included: Multiple identical kits allow simultaneous learning for small groups, repeated practice, or parallel use in multipoint projects. What makes this kit stand out Componentlevel learning: Uses wellknown ICs, NE555 and CD4017, so learners gain familiarity with standard timer and decade counter behavior. Handson practice: Emphasizes soldering of throughhole components, component placement, and circuit testing steps. Practical output: The visible LED chase pattern gives immediate feedback on assembly and circuit tuning. Key attributes Function: Generates a sequential LED chaser pattern driven by a NE555 timing oscillator and a CD4017 counter. Compatibility: Designed for standard hobby soldering tools and common throughhole components; outputs are suitable for integration into small electronic projects. Size and form factor: Compact PCB kits suitable for desktop assembly and mounting in small enclosures or project panels. Material and components: PCB and standard electronic components including integrated circuits, resistors, capacitors, LEDs, and solderable headers. Performance: Provides repeatable timing and sequencing behavior characteristic of NE555 and CD4017 circuits; performance depends on component values and assembly quality. Use scenarios Electronics learning: Ideal for classrooms, workshops, or selfstudy to learn soldering technique and the principles of timers and counters. Hobby projects: Add sequential lighting to model rail layouts, scale displays, or DIY decorative panels. Prototyping and testing: Use one or more assembled kits as visual indicators for project prototypes where a simple runninglight sequence helps identify state changes or wiring. What you receive Three identical chaser light DIY soldering kits that use NE555 and CD4017 components to produce LED chasing sequences. Each kit is intended for handson assembly and testing. Notes These kits are intended for educational and hobby use. Basic soldering tools and a suitable lowvoltage DC power source are typically required for assembly and operation.