500Hz Modulated Ultrasonic Transmitter
#ultrasonic
#transmitter
#500Hz
#modulation
#sound
#frequency
#sensor
#audio
#signal generator
#waveform
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R-40-16 ultrasonic receiver circuit
The circuit consists of transistors VT1 through VT7 and other components. Due to the weak signal received from the transmitter, the circuit employs a multi-stage amplifier to enhance the output. This output generates a square wave pulse signal to control...
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IC2 is a stable oscillator whose frequency and pulse width are determined by the values of R4, R5, R6, and C4. R4 is adjustable for precise frequency setting. The output from IC2 is at pin 3, which is capacitively coupled...
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Enhancements include an analog front end, pin-to-pin compatibility for existing designs, an analog stabilized comparator, and simplified external circuit design. There is improved time and temperature measurement with reduced current consumption. The TDC-GP21 is ideally suited for designing compact and...
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An AC millivoltmeter - calibrated in dB - with a range of 30V down to 3mV full scale (80dB range) would be extremely useful. Attach a microphone (electret mic capsules are quite good), and you have a relative sound level...
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This circuit generates a sinusoidal output of approximately 8 V peak-to-peak, which can be adjusted down to zero, operating at a frequency of about 500 Hz. The signal is produced by a phase-shift oscillator.
The described circuit utilizes a phase-shift oscillator,...
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A high-quality QRP transmitter, named NEXUS 6, is designed to explore issues related to extremely narrow bandwidth communication. This device is not merely a simplified version of a QRP transmitter; it aims to create a cost-effective system that can be...