Ultrasonic-transceiver

Hear with Ultrasound Using Flanagan Neurophone

By mixing an audio signal with ultrasound, you can hear the audio as if it's inside your head... even if the 'headphones' are nowhere near your ears. Patrick Flanagan invented the "Neurophone" over 40 years ago. His original patent (US3393279) was basically a radio transmitter that could be...

20Khz-arc-welding-inverter

The Class A series resonant inverter portrayed is well-known and respected for its high efficiency, low cost, and small size, provided that operating frequency is greater than about 3 kHz.

Doppler Ultrasound Transmitter Circuit

The 2.25-MHz.osciJlator Ql drives amplifier Q2 and XTAL1, an ultrasonic transducer. The transducer is a lead zireonate-titanate type.

Ultrasonic-transceiver

The LM1812 is a complete ultrasonic transceiver on a chip designed for use in a variety of pulse-echo ranging applications. The chip operates by transmitting a burst of oscillations with a transducer, then using the same transducer to listen for a return echo. Ifan echo of sufficient amplitude...

Ultrasonic switch circuit

This circuit functions with inaudible (ultrasonic) sound. Sound of frequency up to 20 kHz is audible to human beings. The sound of frequency above 20 kHz is called ultrasonic sound. The circuit described generates (transmits) ultrasonic sound of frequency between 40 and 50 kHz. As with any other...

Ultrasonic Sound Source

Using two NE555 timer IC devices, this circuit generates either pulsed or continuous ultrasonic signals. The value

Sonar-transducer-switch

This submersible sonar positioning apparatus generally consists of dual-opposed ultrasonic transducers, alternately excited, with return signals processed and displayed for observation and measurement. Typical transmitter frequencies range from 50 to 200J

Mosquito-repelling circuit

In the 555 oscillator circuit, adjusting R2 will provide output frequencies from below 200 Hz to above 62 kHz