http://www.simplecircuitdiagram.com Free Simple Circuit Diagram Tue, 24 Jan 2012 02:31:05 +0000 en hourly 1 http://wordpress.org/?v=abc http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/ http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/#comments Mon, 02 Jan 2012 00:18:47 +0000 Rust http://www.simplecircuitdiagram.com/?p=2740 An oscillator can be built using LC (inductor-capacitor) tank circuit. When we vary the capacity of the capacitor in LC tank circuit then the frequency of the oscillator will vary according to capacitance change.  The idea of this modulator is … Continue reading →]]> http://www.simplecircuitdiagram.com/2012/01/02/frequency-modulated-oscillator-for-fm-transmitter/feed/ 0 http://www.simplecircuitdiagram.com/2011/10/28/voltage-to-frequency-converter-using-ujt/ http://www.simplecircuitdiagram.com/2011/10/28/voltage-to-frequency-converter-using-ujt/#comments Fri, 28 Oct 2011 12:08:50 +0000 Rust http://www.simplecircuitdiagram.com/?p=2713 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 →]]> http://www.simplecircuitdiagram.com/2011/10/28/voltage-to-frequency-converter-using-ujt/feed/ 0 http://www.simplecircuitdiagram.com/2011/02/22/digitally-programmable-oscillator/ http://www.simplecircuitdiagram.com/2011/02/22/digitally-programmable-oscillator/#comments Tue, 22 Feb 2011 00:58:04 +0000 Rend http://www.simplecircuitdiagram.com/?p=2378 The schematic diagram below shows a digitally programmable oscillator circuit. This programmable oscillator circuit is based on V/F (voltage to frequency) converter, which is programmable by an analog voltage at the input. To make it digitally programmable, a DAC (digital … Continue reading →]]> http://www.simplecircuitdiagram.com/2011/02/22/digitally-programmable-oscillator/feed/ 0 http://www.simplecircuitdiagram.com/2010/11/25/astable-and-monostable-multivibrators/ http://www.simplecircuitdiagram.com/2010/11/25/astable-and-monostable-multivibrators/#comments Thu, 25 Nov 2010 13:35:16 +0000 Rust http://www.simplecircuitdiagram.com/?p=1995 Multivibrators is two state devices which is used extensively in digital electronics. The bistable multivibrators or called filp-flop are the basic memory devices used in sequential logic. Beside bistable multivibrator, there are also astable multivibrator which serves as an oscillator … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/11/25/astable-and-monostable-multivibrators/feed/ 0 http://www.simplecircuitdiagram.com/2010/11/25/varactor-the-core-of-voltage-controlled-lc-tuner/ http://www.simplecircuitdiagram.com/2010/11/25/varactor-the-core-of-voltage-controlled-lc-tuner/#comments Thu, 25 Nov 2010 13:28:47 +0000 Rust http://www.simplecircuitdiagram.com/?p=1992 In hybrid system, analog system with digital control, a voltage controlled things is very important since it can be interfaced by DAC from digital system. For radio tuning with digital control, a voltage controlled LC circuit is needed. If we … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/11/25/varactor-the-core-of-voltage-controlled-lc-tuner/feed/ 0 http://www.simplecircuitdiagram.com/2010/10/08/one-transistor-pump-building-block/ http://www.simplecircuitdiagram.com/2010/10/08/one-transistor-pump-building-block/#comments Fri, 08 Oct 2010 06:41:17 +0000 Rend http://www.simplecircuitdiagram.com/?p=1618 This is a one transistor pump circuit. This is a very simple circuit and very helpful, you can use it as a building block for designing more complex electronic circuit. This circuit generates voltage staircase from a square wave input. … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/10/08/one-transistor-pump-building-block/feed/ 0 http://www.simplecircuitdiagram.com/2010/08/11/grid-dip-oscillator-gdo-instrument/ http://www.simplecircuitdiagram.com/2010/08/11/grid-dip-oscillator-gdo-instrument/#comments Wed, 11 Aug 2010 04:02:25 +0000 Rend http://www.simplecircuitdiagram.com/?p=1286 This is a grid dip oscillator (GDO) circuit developed by Luigi Falcone. This circuit uses seven plug in coils covering 3.0 to 30Mhz. This circuit can be connected to the a frequency meter by using The coaxial socket J2.  The … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/08/11/grid-dip-oscillator-gdo-instrument/feed/ 0 http://www.simplecircuitdiagram.com/2010/01/25/jfet-pierce-crystal-oscillator/ http://www.simplecircuitdiagram.com/2010/01/25/jfet-pierce-crystal-oscillator/#comments Mon, 25 Jan 2010 19:22:38 +0000 Adam http://www.simplecircuitdiagram.com/?p=510 This is a simple JFET pierce crystal oscillator. We can use a wide frequency range of crystal using this circuit without circuit modification. Here is the circuit : This circuit uses Q, 2N3823, that is maintained thus insuring good stability … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/01/25/jfet-pierce-crystal-oscillator/feed/ 0 http://www.simplecircuitdiagram.com/2010/01/14/quadrature-sinewave-oscillator/ http://www.simplecircuitdiagram.com/2010/01/14/quadrature-sinewave-oscillator/#comments Thu, 14 Jan 2010 00:44:31 +0000 Adam http://www.simplecircuitdiagram.com/?p=453 Quadrature oscillator is another type of phase shift oscillator. This circuit produce two sine wave signal. One of them is shifted 90 degree from the other signal. The output that shifted 90 degree is called cosine signal and the other … Continue reading →]]> http://www.simplecircuitdiagram.com/2010/01/14/quadrature-sinewave-oscillator/feed/ 0 http://www.simplecircuitdiagram.com/2009/12/24/bubba-oscillator/ http://www.simplecircuitdiagram.com/2009/12/24/bubba-oscillator/#comments Thu, 24 Dec 2009 10:05:32 +0000 Adam http://www.simplecircuitdiagram.com/?p=329 One example of the  phase shift oscillator is Bubba oscillator. This oscillator gets 45 degree phase shift for each section from quad op-amp package. The result is excellent d(phase)/d(t) to obtain very low frequency drift. The circuit is shown below: … Continue reading →]]> http://www.simplecircuitdiagram.com/2009/12/24/bubba-oscillator/feed/ 0