Multi-function electronic controller circuit schematic

Shunluo Inductance Power Inductor SWPA Series First Class Agent

Photocoupler

As shown in the figure, the discharge time of the circuit is much shorter than the charging time, that is, the pull-in time of the relay J is longer than the release time, and the fan is blown out by the gust. Adjusting RP2 changes the spacing of the gusts. IC2 (CD4022) is an octal count/pulse splitter that combines with C2, R6, R7, etc. to form a counting circuit. At the moment when the power is turned on, the C2 voltage does not change, and the CD4022 reset terminal R (15 feet) adds a high potential, causing the Q0 terminal (2 feet) to be at a high level, VT2 to be turned on, and the "0" position indicator LED 2 to be issued. Green light indicates that it is ready for operation. Press AN1, CP terminal (14 feet) is inherently high level, so that the circuit is in the counting state, Q0 is reset, Q1 (1 pin) is high level, which causes VT3 to be turned on, so that SCR1 triggers conduction. The fan turns to the "l" file, and then presses AN1, and a CP pulse is input. Q2 (3 feet) is high, VT4 and SCR2 are turned on, and the fan is running at "2". The "3" file is the same as above. If AN2 is pressed, it is equivalent to inputting a reset pulse, and the fan stops.