Four-way flashing light string circuit (1)

It is a four-channel flashing LED controller composed of digital circuits, solid-state relays and other components. It has
a large output power and the driving power of each channel can reach 600W.
    Time base circuit Al (NE555) and R-, R. , RP and C. It forms an ultra-low frequency oscillator, and its ③ pin outputs
a square wave clock pulse, which enters the decimal counter. The CP terminal of the pulse distributor A2 (C:D4017) is the @ pin.
A2 starts counting and its output terminals Qo-Qr) sequentially output high level. When QO-Q3 output high level in sequence,
solid-state relays SSR1-SSR4 are triggered and turned on in sequence, driving the colored lights
to light up in sequence F1, E2, E3, E4 ; when Q4 outputs high level, because the Q4 terminal of this circuit Not connected, SSRl - S.SR4 have no
trigger signal and are in the off state, so all the colored lights are extinguished and do not light up: when Q5 outputs island level, the pulse signal
directly enters the clearing and complexing
terminal R from the Q5 terminal, so that AZ is cleared and the circuit repeats
the above process. After the necessary power is turned on, the four colored
lanterns can light up and shine in sequence. Adjust
the LU positioner RP to change
the pulse frequency of the Al input II1 so as to adjust
the cycle rate of the lighting string of colored lights. The cycle lighting time
can be continuously adjusted within () 5~65 s.
    LEr)lI,F:L)4
Depending on the hobby, red or green LEDs are used.
They are used as four-way output status indicators in the circuit
, and their flashing is in conjunction with the colored lights El~F. 4 synchronous, SSRl - SSR4 collapsible SP11]O'< solid state relay
, its on-state output current can reach 3A (effective value), so the controllable maximum power of each lantern
is 600W. WH5 type small synthetic carbon film potentiometer for RP . R. -R, it is best to use Ri 1,/,iw type metal film resistor. There are no special requirements for other
components. In order to obtain a better visual effect when the light string flows, Canzhong EJ can use red
bulbs; E2 uses green bulbs; E3 uses blue bulbs; ]: 4 uses yellow bulbs.