Electronic flash firecracker circuit made with KD5601

0805RGB flashing

Photocoupler

When the human hand touches the electrode P of the firecracker fuze, the human wave received by the human body and the induced alternating current signal and the like are detected and amplified by the complementary composite high-efficiency amplifier composed of BG1 and BG2, and the IC trigger terminal 5 pin is transmitted. The human positive pulse signal outputs a simulated firecracker acoustic signal with a length of about 20 seconds from the 4th foot, and filters out some unpleasant harmonic components through C1, and the sound is emitted by the horn through the R2 current limiting and BG3 power amplification. At the same time, the acoustic signal at both ends of the horn is added to the transmitting junction of BG4 via W, and after being amplified by BG4 and BG5, the red small electric bead ZD is driven to flash synchronously with the firecracker.