Multi-ground control switch circuit

This article introduces four kinds of multi-ground control switch circuits.

Multi-ground control switch circuit----circuit one

This example introduces a multi-ground control switch with a delay function that uses multiple buttons to control one illuminator. By pressing any button, the illumination lamp can be turned on, and the illumination lamp is automatically turned off in about 3 minutes. The multi-ground control switch circuit is composed of control buttons S1 to S5, a power supply circuit and a timing control circuit, as shown in the figure.

Multi-ground control switch circuit components select R1 and R2 to select 1/4W or 1/8W carbon film resistors. Both C1 and C2 are aluminum electrolytic capacitors with a withstand voltage of 25V. VD selects 1N4001 or 1N4007 silicon rectifier diode for use. The IC selects the NE555 type time base integrated circuit. UR uses 1A, 50V rectifier bridge stack. K selects JRX-13F type 12V DC relay. T selects a power transformer with 3 to 5W and a secondary voltage of 11 to 12V. S1 ~ S5 select the dynamic (normally open) type power button with contact current greater than 5A. EL selects multiple 40~60W bulbs in parallel.

Multi-ground control switch circuit----circuit two

The multi-ground control switch introduced in this example can arbitrarily turn on or off the working power of a certain part of the load (electrical equipment) in multiple places. The switch can be used for lighting control in corridors, corridors, public spaces, and industrial production (control of a production facility in multiple locations on the factory floor). The multi-ground control switch circuit is composed of intermediate relays KA1 to KA3 and S1 to Sn as shown in the figure.

Ground control switch circuit (4) If you need to control the load with high power, you can replace KA1 with AC contactor. The component selection S1 ~ Sn selects the dynamic (normally open) button. KA1 ~ KA3 select 220V AC intermediate relay.

Multi-ground control switch circuit----circuit three

The multi-ground control switch described in this example can be used to control lighting or low-power single-phase AC motors. The ground control switch circuit is composed of a step-down circuit and a control circuit, as shown in the following figure.

Multi-ground control switch circuit components select R1, R3 and R4 to select 1/4W metal film resistors; R2 selects 1/2W metal film resistors. C1 uses monolithic capacitors; C2 uses aluminum electrolytic capacitors with a withstand voltage of 16V. IC selects CD4024 type 7-bit binary counter integrated circuit. UR and VT should be selected according to the power of the load. If the lighting below 100W is controlled, UR and VT can use 1A, 400V rectifier bridge and thyristor; if control single-phase AC motor below 1kW, UR and VT The current capacity should be 6-10A.

Multi-ground control switch circuit----circuit four

In this example, the multi-ground control switch can be used to control one-way electrical appliances (such as lighting) with multiple button switches. It is suitable for hotels, hospitals, corridors, stairs, etc. where more than 3 switches are required. The multi-controller switch circuit is composed of a power supply circuit, a monostable trigger, a flip-flop and buttons S1 to Sn, a thyristor VT, etc., as shown in the figure.

Multi-ground switch controller circuit components choose R1 to select 1/2W carbon film resistor or metal film resistor; R2 ~ R4 select 1/4W carbon film resistor. C1 selects a polyester capacitor or CBB capacitor with a withstand voltage greater than 400V; C2 selects an aluminum electrolytic capacitor with a withstand voltage of 25V; C3 uses a monolithic capacitor or a polyester capacitor. VD selects 1N4007 silicon rectifier diode for use. VS selects 1/2W, 9V silicon Zener diode. VT selects 3A, 600V bidirectional thyristor. IC selects CD4013 or C043 double D flip-flop integrated circuit. S1 ~ Sn select the normally open button.

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