More circuits about oscillator, pulse, frequency , and others.

Simple Active Antenna in SW/MW/FM bands

This is a simple active antenna circuit, for the radio receiver SW/MW/FM band. It is a circuit to try to work on many brands of radios. This circuit has a only 18-inch antenna, when used with short wave The radio receiver will be able to receive signals from stations around the world more clearly. In experiments using this unit with a short wave radio listening is comparable as well. The antenna for shortwave radio with a length of 20-30 feet. When used with a The radio receiver frequency broadcast mw general, from the reception of some stations is poor. Will…


Simple Sawtooth and Pulse Generator using LM566

The simple Function generator two waveform. It produces Sawtooth(Triangle) and Pulse(Square) waves from 1Hz up to 1MHz. The Amplitude, offset and duty cycle are adjustable to offer wide range of generated signals. The important part of the circuit is LM566 or NE566. I used R2 controls Frequency output. The power supply voltage is 9V to 24V. The LM566 circuit is a general purpose voltage controlled oscillator which may be used to generate square and triangular waves, the frequency of which is a very linear function of a control voltage. The frequency is also a function of an external resistor and…


Simple function generator using op amp LM1458

This is function generator using op amp. As usual the function generator will be expensive and difficult.However, this is a simple circuit with only two ICs. This circuit is suitable for experiments. The output is 3 waveform , Square wave signal amplitude 7Vp-p, Triangular wave = 2Vp-vp and sine wave = 2Vp-p all have the frequency 1kHz. We use 2 x LM1458 IC number, is the main equipment this a dual op-amp IC. This circuit uses op-amp 4 section, follow circuit image. The IC1a is square wave generator, Assumed initial, C1 is charging voltage at inverting input pin to zero,…

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