Category Archives: Oscillators

Solid-State (555 IC) Stroboscope

Posted on November 13, 2011 by Rend

Stroboscope is used to measure the speed of rotation, using the effect of strobed light, where a moving object will be perceived as stationary object if the light is strobed fast enough relative to the movement speed. When applied to … Continue reading →

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Voltage to Frequency Converter Using UJT

Posted on October 28, 2011 by Rust

The following voltage to frequency converter (V/FC – VCO) circuit consist of a UJT (uni-junction transistor) oscillator in which the timing charge capacitor C2 is linearly depends on the input signal voltage. The voltage across resistor R5 set the charging … Continue reading →

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LM139 One Shot Multivibrator/Timer

Posted on October 24, 2011 by Rust

One shot multivibrator circuit is also known as monostable multivibrator or timer. The function of such circuit is simply produce a pulse strobe with a fixed width, regardless of the pulse width of the triggering input.  Below is the circuit’s … Continue reading →

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