How to control the 220V AC relay with the output of the single chip microcomputer I.O., and what kin

First of all, the load you control is 220V AC, but the relay is DC driven, (unless the load is particularly heavy, to use AC contactor, then add a relay relay), the general lantern (small bead string) power is not too large, directly use the 12V power supply (6V can also be) the relay, the contact load is greater than 1 amperere. There are generally two points to consider:1

The primary current (or power consumption) of the relay is generally about 1W. 2.The contact load of the secondary reed, its rated working current (also the resistive inductive current), here the lantern as the load, so it is "resistive", this current value x 220 = the total driving power you want (preferably some margin).

For example, if the total wattage of 10 colored lights (parallel mode, connected to 220V) is 10 x 20 (wattage of a single bulb) = 200W, then the contact load current should be greater than or equal to 200 220 = A, and 1 ampere can be used. If it is an inductive load (such as an electric motor, induction cooker, transformer, etc.), it is necessary to make 3 times the margin.

Also pay attention to the rated current of the relay, too small the relay will burn out. In addition, if the current is large, it is necessary to do a good job of relay discharge protection to prevent the relay from ignition.

Use a triode to drive, and a diode should be used to protect the relay.

Relays, lagging behind, you check the information on how to use IGBT.

<> microcontroller is an integrated circuit chip, which uses ultra-large-scale integrated circuit technology to integrate the best processor CPU, random access RAM, read-only memory ROM, a variety of IO ports and interrupt systems, timer counters and other functions (may also include display drive circuits, pulse width modulation circuits, analog multiplexers, AD converters and other circuits) A small but complete microcomputer system integrated into a silicon wafer, which is widely used in the field of industrial control. From the 80s of the last century, from the 4-bit and 8-bit single-chip microcomputers at that time, to the current 300m high-speed single-chip microcomputer.

In fact, the input-output characteristics of the relay are based on his working principle, the relay characteristics of the relay, the input signal x of the relay continuously increases from zero to the action value xx when the armature begins to engage, and the output signal of the relay immediately jumps from y=0 to y=ym, that is, the normally open contact from off to on. Once the contact is closed, the input amount x continues to increase, and the output signal y will no longer change. When the input amount x drops from a value greater than xx to xf, the relay begins to release and the normally open contact is disconnected.

We call this characteristic of the relay the relay the relay characteristic, also known as the input-output characteristic of the relay. Reference.

The ratio of the release value xf to the action value xx is called the feedback coefficient, i.e. The ratio of the control power PC output on the KF=XFXX contact to the minimum power P0 absorbed by the coil is called the rolling coefficient of the burn-control difference of the relay skin, that is, KC=PC Qingru P0

It should be a relay, A2 A1 is the coil A1 is positive A2 is negative 11 12 13 14 is two pairs of contacts Then 11 13 is a point It should be a common point You use a multimeter to measure it to see which one is normally open Which is normally closed You know, it should be 12 normally open 14 normally closed, may I ask where you use it You can add me Q