Strobe Light and Sound

Snap Circuits® uses electronic blocks that snap onto a base grid to build different circuits. These blocks have different colors and numbers on them so that you can easily identify them. Build the circuit shown by placing all the parts with a black 1 next to them on the clear base grid first. Then, assemble parts marked with a 2. Connect the white LED (D6) using the red & black jumper wires as shown, with red wire to “+” side. Install three (3) “AA” batteries (not included) into the battery holder (B3).

Turn on the slide switch (S1). The white LED should be flashing. Move the lever on the adjustable resistor (RV) to adjust the flash rate a little.

Note: In rare cases the circuit may not work at all settings of RV. If this happens, move the RV lever to the side near the strobe IC (U23), and only move the RV lever over a small range.