The Filter circuit for the Scratch and Rumble Noise
If a friend gets into trouble about the noise. Try out this circuit before
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July 23, 2017
More circuits about oscillator, pulse, frequency , and others.
VHF Dip Meter circuit
The frequency meter by use the LC resonance circuit that adjustable until the frequency show peak amplitude.
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FM wireless microphone circuit diagram
This is a FM Wireless Microphone circuit Which we add one transistor in the RF amplifier. So this circuit have two resonance circuits and also two trimmers. This cause have Higher efficiency and transmission far up.
June 24, 2017
Current-controlled Sawtooth Generator Circuit
This Sawtooth wave generator circuit include of the frequency oscillator is controlled by current. Which can generate the sweep frequency in wide range. [...]
June 19, 2017
Band rejection filter circuit using TL071
The band rejection filter circuit is not wide filter that can denial the frequency up to 60dB by we used the TL071 single chip op-amp it is very low distortion…
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This am radio receiver circuit with earphone is a saving version that use a few parts, cheap , easy to build and suitable to be assembled to study,3V batt.
June 12, 2017
Sine wave oscillator low frequency-constant amplitude
SEE! Simple Sine wave oscillator low frequency. Without thermistor and Incandescent lamp so very linear in transistor and zener diode circuit.
June 7, 2017