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Precision Gated Oscillator Circuit – Circuit Schematic
Precision Gated Oscillator Circuit
A 1-kHz gated oscillator with no long turn-on cycle is show. R2, R3, and D1 preset the voltage...
Cmos Vfo Circuit – Circuit Schematic
Cmos Vfo Circuit
The circuit shown has a frequency range of 2 Hz to 30 kHz, ...
Variable Wein Bridge Oscillator Circuit – Circuit Schematic
Variable Wein Bridge Oscillator Circuit
This circuit uses a single potentiometer to time a 300- to 3000-Hz range. A FET op amp is used at A1 and A2....
Precision Lf Oscillator Circuit – Circuit Schematic
Precision Lf Oscillator Circuit
Using Rl, R7, and D1 to preset CI to one third of the supply voltage,...
Gated 1Khz Oscillator (Normally On) Circuit – Circuit Schematic
Gated 1Khz Oscillator (Normally On) Circuit
This gated 1-kHz oscillator offers press-to-turn-off operation, A,...
Gated 1Khz Oscillator (Normally Off) Circuit – Circuit Schematic
Gated 1Khz Oscillator (Normally Off) Circuit
This gated 1-kHz oscillator offers press-to-turn-on operation, A,...
Af Power Oscillator Circuit – Circuit Schematic
Af Power Oscillator Circuit
An LM386 audio power IC is set up as a feedback oscillator. Any supply from 6 to 12 V can be used. ...
Simple Rf Test Oscillator Circuit – Circuit Schematic
Simple Rf Test Oscillator Circuit
A simple oscillator for IF alignment (455 kHz) can prove useful in field testing or where a standard signal generator is available....
Noise Generator Circuit – Circuit Schematic
Noise Generator Circuit
This circuit generates noise pulses that are suitable for test purposes, etc. A zener diode is used as a noise source. IC1 is a relaxation oscillator. PI deter...
Top Octave Generator Circuit – Circuit Schematic
Top Octave Generator Circuit
Using an MK50240, this circuit produces 12 top octave tones. The input and output lines can be divided using a binary divider IC to obtain the lower notes. ...
Electronic Metronome Circuit – Circuit Schematic
Electronic Metronome Circuit
Ra sets the rate while RH sets the volume of clocks in the speaker. The 555 is configured as a low frequency oscillator. ...
Astable Multivibrator I Circuit – Circuit Schematic
Astable Multivibrator I Circuit
In This multivibrator circuit frequency and pulse width can be separately controlled by using steering diodes (1N914)...
Astable Multivibrator Or Free-Running Square-Wave Oscillator Circuit – Circuit Schematic
Astable Multivibrator Or Free-Running Square-Wave Oscillator Circuit
This free-running square-wave oscillator uses two npn transistors. Output frequency is approximately 300 Hz ...
Very Low Frequency Multivibrator Circuit – Circuit Schematic
Very Low Frequency Multivibrator Circuit
The use of JFETs permits, high resistance and long time constants in this very low frequency multivibrator....
Improved Cmos Multivibrator Circuit – Circuit Schematic
Improved Cmos Multivibrator Circuit
This circuit uses a protective resistor R2 in conjunction with feedback resistor Rl. Together, they form a voltage divider to reduce the input voltage amplitud...
555 Fm Circuit Circuit – Circuit Schematic
555 Fm Circuit Circuit
Circuit for applying a dc-coupled FM or PPM to a 555 configured as an oscillator. IC-1 - Motorola MC-1374P. IC-2 - National LH0002C. L1, L2 - Mouser Electronic...
Phase-Locked Loop Circuit – Circuit Schematic
Phase-Locked Loop Circuit
The PLL will lock onto an input signal. Both triangle- and square-wave outputs are available....
Signal Generator Circuit – Circuit Schematic
Signal Generator Circuit
Useful for troubleshooting audio, video, and lower frequency RF amplifiers,...
Unusual Hall-Effect Oscillators Circuit – Circuit Schematic
Unusual Hall-Effect Oscillators Circuit
Although not intended for this application, Hall-effect switch can be used as the basis for a rather unusual oscillator. The oscillator can be reconfigured, as...
Triangle- And Square-Wave Generator Circuit – Circuit Schematic
Triangle- And Square-Wave Generator Circuit
The circuit will generate precision triangle and square waves. The output amplitude of the square wave is set by the output swing of op amp Al, xndRl/R2 sets t...