Mô Tả Sản Phẩm
Product use:
Program-controlled switches, photocopiers, washing machines, refrigerators, cameras, sterilized cupboards, door magnetism, window magnetism, electromagnetic relays, electronic scales, liquid meters, gas meters, water meters, etc. are all well used.
Module features:
- use of imported open reeds
- the comparator output, clean signal, good waveform, strong driving power, over 15 ma.
- working voltage 3.3v-5v
- output form: digital switch volume output (0 and 1)
- fixed bolt holes for easy installlation
- small plate pcb size: 3.2 cm x 1.4 cm
- wide voltage lm393 comparator
Characteristics of reeds:
The dry reed is a short term for dry tongue reed, a contactless electronic switch element with the advantages of simple structure, small size and easy to control. its shell is usually a sealed glass tube with two iron elastic reed plates and an inert gas called metal rhodium.Normally, two reeds made of special materials in the glass tube are separated.When a magnetic material is near a glass tube, two reeds in the tube are magnetized to contact each other, and the reeds suck together to connect the circuit at the junction.When the external magnetic forces disappear, the two reeds are separated by their own elasticity and the line is diskonnected.Therefore, as a circuit switch device controlled by magnetic field signals, the reed can be used as a sensor for counting, limiting, etc. (mainly for door magnetism, window magnetism fabrication in security systems), and is widely used in various communication devices.In practice, permanent magnetic iron is usually used to control the connection of the two pieces and is therefore also known as "magnetic control tube."
Description of the use of the module:
- dry reeds need to be used in conjunction with magnets, which will be in a conductive state when a certain magnetic force is detected, modules output low-level, non-magnetic, diskonnecting state, output high-level, and the induction distance between dry reeds and magnets exceeds insensitive or non-triggered phenomena within 1.5 cm;
- module do output can be directly connected to the i/o port of the single chip, through which the trigger state of the reed can be detected;
- module do output terminal is connected to relay in terminal, which consists of a high power reed switch, which directly controls the high voltage.