Simple to build kit uses a programmable unijunction transistor (PUT) to flash a jumbo red LED. Makes a great first kit and is useful for all types of convention badges, posters, attention getters, hats, model railroads, model planes, etc.

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Operates from one 9V battery (not included). Size of board: 1.25" x 1". Complete with all parts, PC board and instructions. Skill Level 1.