Toy electronic cat circuit (3)
Source: InternetPublisher:红水杯 Keywords: led Updated: 2020/02/15
Circuit working principle: IC 2 forms a simple low-frequency oscillator. IC 2 is a decimal
counting decoding integrated block. VD1 to VD4 in the circuit not only have the function of level signals at the output terminals
, but also have the function of isolating each output terminal from each other. LED 1 and LED 2 are color-changing
light-emitting diodes, and R1 and R2 are their current-limiting resistors.
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