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555 based square wave generator – Circuit Schematic
555 based square wave generator
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1.8 KHz IC 555Basic Oscillator – Circuit Schematic
1.8 KHz IC 555Basic Oscillator
Basic Oscillator (Tone Generator) At 1.8 KHz, IC 555 , Here we have an astable oscillator built around 555, which gives an alarm tone of 1.8 KHz directly drivin...
Simple low voltage Oscillator circuit – Circuit Schematic
Simple low voltage Oscillator circuit
The frequency is pretty stable as the volts drop. The reason i called it the backwards jt is cause it works best with a bifilar coil and one transistor. and wit...
Joulethief SEC exciter and variants 64 – Circuit Schematic
Joulethief SEC exciter and variants 64
After some more time with the circuit, the variable pot certainly brings in more useful results than I expected. Had linked draw to pot position and LED brightn...
Radiant Oscillator – Circuit Schematic
Radiant Oscillator
here is a pic running 36v 500ma on the front, 36v charging on the back. Brightness is approaching level of a 240v globe, considering its a 20 watt.....
fm generation using 555 timer – Circuit Schematic
fm generation using 555 timer
The difference between instantaneous frequency and central frequency of the carrier will be directly proportional to the instantaneous value of the amplitude of...
astable multivibrator transistors – Circuit Schematic
astable multivibrator transistors
An Astable Multivibrator or a Free Running Multivibrator is the multivibrator which has no stable states. Its output oscillates continuously between its two uns...
Crystal Tester Circuit – Circuit Schematic
Crystal Tester Circuit
The idea for this crystal tester circuit sprung out of the need of testing a large number of oscillator crystals lying unused in a big hobby box. testing the cr...
Simple Siren Circuit – Circuit Schematic
Simple Siren Circuit
This circuit generates a tone that sounds very similar to a siren. The generator part of the circuit is made of the combination of PNP and NPN transistors. Togh...
Quartz Crystal Oscillator Circuit – Circuit Schematic
Quartz Crystal Oscillator Circuit
This quartz crystal oscillator circuit has greater stability than a parallel resonance circuit. It generates frequencies up to 30 MHz or even higher if you use ...
Frequency Modulated FM Oscillator Circuit – Circuit Schematic
Frequency Modulated FM Oscillator Circuit
This FM oscillator can be used for wireless audio, microphone and part-15 applications where stable frequency modulated oscillators is needed. Lt can be va.....
10 MHz to 1 GHz Oscillator – Circuit Schematic
10 MHz to 1 GHz Oscillator
Nowadays, it is no longer necessary to use discrete components to build oscillators. Instead, many manufacturers provide ready-made voltage-controlled osci.....
Wide Frequency Range 555 VCO – Circuit Schematic
Wide Frequency Range 555 VCO
The 555 frequency can be varied via adjusting the voltage at pin 5. However, the range and linearity of frequency adjustment is very limited. This is a way.....
555 Duty Cycle Control – Circuit Schematic
555 Duty Cycle Control
Here is a simple oscillator circuit that varies the duty cycle over a wide range without affecting the frequency. It is a variation of the simple 555 astab.....
Programmable Unijunction Transistor (PUT) Flasher Circuit – Circuit Schematic
Programmable Unijunction Transistor (PUT) Flasher Circuit
This is simple circuit that illustrates the function of the programmable unijunction transistor. It may be quickly wired on a proto-board. PUT Flasher Spec.....
Simple Square Wave Generator with 7400 – Circuit Schematic
Simple Square Wave Generator with 7400
This is a very simple square wave generator circuit built with IC 74LS00 that can generate square signals with frequencies between 20 Hz and 1 MHz. Its stabilit...
Quartz 1Hz Generator – Circuit Schematic
Quartz 1Hz Generator
Here is one basic circuit of a simple but accurate 1Hz timebase generator built around a standard Quartz clock circuit board. Just lift the clock PCB from.....
Voltage to Frequency Converter Circuit – Circuit Schematic
Voltage to Frequency Converter Circuit
This voltage to frequency converter circuit has an oscillator that is voltage controlled and has a small, 0. 5% deviation. IC1 function as a multivibrator and p...
Wien Bridge Oscillator Circuit – Circuit Schematic
Wien Bridge Oscillator Circuit
THis Wien bridge oscillator is very simple and as every wien oscillator has low distorsion and the resonance frequency can be easily adjusted. This frequen.....
Sawtooth Generator Circuit with 741 IC – Circuit Schematic
Sawtooth Generator Circuit with 741 IC
This sawtooth generator circuit use 741 IC and is used as a musical sound synthesizer. The sawtooth input signal is continously changed through P2 to a wav.....