Search results
Results from the WOW.Com Content Network
A buzzer or beeper is an audio signaling device, [1] which may be mechanical, electromechanical, or piezoelectric (piezo for short). Typical uses of buzzers and beepers include alarm devices , timers , train and confirmation of user input such as a mouse click or keystroke.
A piezoelectric speaker (also known as a piezo bender due to its mode of operation, and sometimes colloquially called a "piezo", buzzer, crystal loudspeaker or beep speaker) is a loudspeaker that uses the piezoelectric effect for generating sound. The initial mechanical motion is created by applying a voltage to a piezoelectric material, and ...
The circuit is connected to a light or sound-emitting device of some sort, so that when the loop and the wire touch, the light-emitting device will light up, and the sound-emitting device will make a sound, traditionally a buzzing noise. In commercial implementations of the game the wire is usually bent along a single axis.
The operator dragged the wire across the crystal surface until the detector began functioning. The battery-powered buzzer circuit (B2, BZ, S1) generated a test signal to determine if the detector was functioning. Switch S1 was closed and the electromagnet-operated buzzer BZ was turned on while the detector was adjusted. The sparks at the buzzer ...
The diaphragm is attached to contact points that repeatedly interrupt the current to that electromagnet causing the diaphragm to spring back the other way, which completes the circuit again. This arrangement opens and closes the circuit hundreds of times per second, which creates a loud noise like a buzzer or electric bell , which sound enters ...
In electronics, a buffer amplifier is a unity gain amplifier that copies a signal from one circuit to another while transforming its electrical impedance to provide a more ideal source (with a lower output impedance for a voltage buffer or a higher output impedance for a current buffer).
Get AOL Mail for FREE! Manage your email like never before with travel, photo & document views. Personalize your inbox with themes & tabs. You've Got Mail!
A Class A siren is loud enough that it can be mounted nearly anywhere on a vehicle. Class B sirens are not as loud and must be mounted on a plane parallel to the level roadway and parallel to the direction the vehicle travels when driving in a straight line. [15] Sirens must also be approved by local agencies, in some cases.