Arrow of love arrow

Industrial Router Crystal 3.2*2.5mm 3225 26M (26.000MHZ) 12PF 10PPM 20PPM 30PPM

inductance

SMD aluminum electrolytic capacitor

Arrow of love arrow circuit

The arrow of the god of love, that is, with 10 LEDs in the form of arrows, the color from the end of the arrow to the arrow is three green, two yellow, two orange, two red, one flashing red. When the button is pressed, the LED lights up from the end of the arrow to indicate archery. Only the 10 LEDs are fully illuminated (indicating that the arrow's LED is on), indicating the arrow in the operator.
Press Sl to add the pulse output from pin 3 of IC1 to the clock input terminal 14 of IC2 (4017). The output terminal O-9 of IC2 is cycled high. Because of the number of pulses output by IC1 after S1 is released, it is unknown that one pulse of IC1 makes the output of IC2 high. Since the output of lC2 is connected with a voltage divider with different partial pressure ratio, the axis after voltage division is out. The voltage will vary.
The auxiliary voltage of the conducting diode is applied to the voltage divider of R24, RV1, and R25, and C2 is charged, and charging takes several seconds. This slowly increasing voltage is applied to pin 5 of the strip display driver chip IC3. IC3 inverts the analog voltage on pin 5, and as the voltage of pin 5 rises, the 10 outputs of IC3 go from bottom to top. As the voltage of the 5 pin increases by 0.125V, there will be one output that goes low one after another, and the corresponding two light-emitting diodes emit light.