Learn and build electronic circuits
In this post we will discuss a few interesting audio circuits using Field effect transistors or FETs Dual-channel Audio Mixer In Figure below, you can notice a traditional circuit for mixing two af signals or for choosing one or the other. Similar to the bipolar-transistor circuit, it supplies individual inputs and a common output. Separate … Read more
This discussed audio signal conditioner circuit is great for sweeping weak and noisy audio or Morse-code signals. The circuit can also be utilized to clean up digital audio signals which are of the same frequency in a remote-control extender circuit. How it Works Referring to the circuit diagram below, the audio signal is attached through … Read more
In telecommunication devices, the squelch circuit is introduced in order to enable the suppression of the audio (or video) output of a receiver whenever a low or weak signal input is detected. This circuit attenuates the background noise that is present between the transmissions and when tuning an audio amplifier system. Moreover, another function of the squelch circuit is as a power amplifier (with … Read more
When generating tape recordings, particularly of “live” shows, it may be quite tough to set the right recording level. This could effortlessly result in an extreme recording level and major distortion developing except if the recording level command is retained well backed off. The price one then needs to pay is a low recording level … Read more
ON SEVERAL events it is really beneficial to manage to establish the frequency of an audio signal. Usually, the consistency and cost of a commercial frequency meter is not really justified. This little frequency meter circuit , employing just a few components will give you a signal of frequencies through 50Hz to 10kHz having an … Read more
The circuit shown here is based on the switching action of transistors, which produce a digital up/down control of an amplifier volume. Volume of a stereo deck can be controlled with the help of a potentiometer which changes the resistance between the output of the preamplifier and input of the amplifier. How the Circuit Functions … Read more