Simple to build kit creates a tone which varies depending on the amount of light you allow to strike on a CDS cell. Kit features IC circuitry and small speaker to create this unusual effect. In total darkness the unit emits clicks or is silent. As light increases the kit emits faster clicking sounds then with more light a continuous tone. Operates from one 9V battery (not included). Size of board: 1 1/4” x 1”.
Complete with all parts, PC board and instructions. Skill Level 1.