(3) with a paperclip do contact Q, the book clip pad, with tape, lead wires, such as circuit connected graph.(4) adjust the distance between the M and the P (by moving the box) so that the electromagnet can attract the shrapnel, adjust the distance between the contact and the shrapnel, so that they can happen to be in contact, and the buzzer can be heard when the power is switched on.
(1) M: in the preparation of the electromagnet iron bolt length of about 6 cm around the 100 ring wire line end, leaving 5 cm leads, with transparent tape to stick to the coil coil, loosen the tape and then stick it in a box, the electromagnet is ready.(2) prepare shrapnel P: cut a long iron sheet about 2 cm wide from the iron can box, bend it at right angles, attach a lead wire to the shrapnel, and then attach the shrapnel to the board with adhesive tape.
The electronic buzzer buzzer is an integrated structure, using the DC voltage power supply, are widely used in computers, printers, copiers, alarm, electronic toys, automotive electronic equipment, telephones, timers and other electronic products for sound device. Buzzer is mainly divided into piezoelectric buzzer and electromagnetic buzzer two types. The buzzer is represented in the circuit with the letters "H" or "HA" (the old standard uses "FM", "ZZG", "LB", "JD", etc.).Product categories: active buzzer and passive buzzerConstruction principle: electromagnetic coils and magnets periodically vibrate and soundDrive circuit: use triode to enlarge current
