Soldering Practice Kit DIY 7-Digit LED Display Electronics Calculator

DIY Soldering Practice Kit: 7-Digit LED Calculator

Build a working 7-digit calculator while practicing through-hole soldering. The transparent acrylic case shows off the circuit, oversized buttons keep operation simple, and once assembled the calculator handles continuous calculations with decimals and negatives, plus resistor color-band decoding.

• 7-digit LED display
• Transparent acrylic case
• Through-hole components; roughly a 1-2 hour build (basic soldering skills recommended)
• Continuous calculations with decimals and negatives
• Built-in resistor color-band decoder
• Powered by two AA batteries
• Illustrated assembly manual and step-by-step video tutorials

Designed for ages 12 and up:

• Ages 12-14: STEM science kits for teens
• Ages 15-16+: intermediate soldering projects
• Adults, students, makers, and hobbyists: professional skill-building

A hands-on soldering project for STEM classrooms, students, and makers.