The discussed circuits are designed to discourage dogs from barking in the selected zone by the generation of a synchronized ultrasonic sound waves in response to a few initial barking of a particular dog. The circuits explained below when correctly optimized will produce a high pitched ultra sonic sound each time it senses a dog […]
Frequency
Tuned Radio Frequency (TRF) Receiver Circuits
A tuned radio frequency receiver (or TRF receiver) is a form of radio receiver which is made using a number of tuned radio frequency (RF) amplifier stages accompanied by a detector (demodulator) circuit to draw out the audio signal, along with an audio frequency amplifier for amplifying the extracted audio into a loudspeaker. This kind […]
Single Phase Variable Frequency Drive VFD Circuit
In this post I have explained a single phase variable frequency drive circuit or a VFD circuit for controlling AC motor sped without affecting their operational specifications. What is a VFD Motors and other similar inductive loads specifically do not “like” operating with frequencies that might be not within their manufacturing specs, and tend to […]
3 Frequency to Voltage Converter Circuits Explained
As the name suggests frequency to voltage converters are devices that convert a varying frequency input into a correspondingly varying output voltage levels. Here we study three easy yet advanced designs using IC 4151, IC VFC32 and IC LM2907. 1) Using IC 4151 This frequency voltage converter circuit using IC 4151 is characterized by its […]
2 Simple Voltage to Frequency Converter Circuits Explained
A voltage to frequency converter circuit converts a proportionately varying input voltage int a proportionately varying output frequency. The first design is using the IC VFC32 which is an advanced voltage to frequency converter device from BURR-BROWN specifically designed to produce an extremely proportional frequency response to the fed input voltage for a given voltage […]
2 Simple Light to Frequency Converter Circuits for Transforming Light into Pulses
In this article we are going to see what is a light to frequency converter circuit, how it works, how to use it in a project, and its specifications. No matter which category you belong to, professional, hobbyist, engineer or student, modular components always reduce half of our headache while designing circuits. They eliminate the […]