Digital Tube Calculator Electronic Soldering Practice Kit with Type-C Power

Colour Ring Calculator DIY Kit This electronic production kit gives you everything needed to build a working digital tube calculator with a difference. Alongside standard addition, subtraction, multiplication and division, the finished unit also converts colour ring resistance values, making it a genuinely versatile tool for electronics enthusiasts. The kit is built around a dedicated circuit board, digital tubes, a microcontroller and push buttons, offering stable performance and dependable long-term use. Power and Setup The calculator accepts power through a Type-C interface with a DC5V supply, or you can use button batteries instead. A small hole on the side of the battery compartment makes removal straightforward, so changing power sources is quick and hassle-free. Learning and Practice This kit is well suited to welding exercises, electronic training and classroom experiments. Assembling the board gives hands-on experience with soldering and component handling, while the finished calculator provides a practical reward for your work. It is an ideal project for DIY enthusiasts looking to build something useful while sharpening their electronics skills.