Circuit Classics: Dual LED Flasher

A rewarding first soldering project that brings one of Forrest M. Mims III's classic hand-drawn circuits to life. With just nine components, you'll build a satisfying dual LED flasher that blinks alternately — a great introduction to the analog side of electronics.

Designed by Star Simpson as part of the Circuit Classics series, this beautifully crafted PCB pairs Mims' iconic circuit designs with exquisite board artwork. It makes a perfect gift for a first-time learner, an expert tinkerer, or as a conversation piece for your desk.

Key Features

• Beginner Friendly – Only nine through-hole components to solder
• Classic Circuit Design – Based on Forrest M. Mims III's iconic hand-drawn schematics
• Beautiful PCB Artwork – Finely crafted board designed for display
• Includes Display Stand – Wooden stand for showing off your finished project
• Flexible Power Options – Use alligator clips with any battery/power supply, or solder the included SMT coin cell clip

Assembly Overview

• Assemble components from shortest to tallest: resistors first, then transistors, capacitors, and LEDs
• Use the included wooden stand to hold the board at an angle while soldering
• Attach the SMT battery clip to the reverse side as a final step
• Clean flux residue with the included alcohol pad for a polished finish

Required Tools (Not Included)

• Soldering iron
• Solder wire
• Third hands (optional, for holding the board)

Package Contents

• 1× Dual LED Flasher PCB
• 2× 2N3906 Transistors
• 2× 100kΩ Resistors
• 2× 220Ω Resistors
• 2× White LEDs
• 2× 22μF Electrolytic Capacitors
• 1× SMT Battery Clip
• 1× Red Alligator Clip
• 1× Black Alligator Clip
• 1× Alcohol Prep Pad
• 4× Rubber Feet
• 1× Wooden Display Stand