Electronic Circuits and electronic circuits, electronic schematics plus an extensive resource for hobbyists, inventors and engineers

DiscoverCircuits.com has links to 45,000+ electronic circuits, cross-referenced
into 500+ categories.    We have searched the web to help you find quick design ideas.

HOME Schematics Hobby Corner Dave's Circuits Electronic Resources Contact Info
Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches
Welcome to DiscoverCircuits.com - online since 2002

See Media Kit for
Advertising Opportunities

Attention Designers:  Please alert us by eMail if we have linked to sites
where your original material has been copied without your permission.
We will change to the LINK to your site.  
Thank you.

 


Oscillators:  Square Wave
#'s - N        O - Z

Oscillator Circuits -- Main Page

 

Last Updated: October 24, 2017 02:55 PM

Circuits Designed by Dave Johnson, P.E. :
Over-Temperature Micro-Power Alarm - The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

Parallel LC Oscillator with CMOS Inverter  - I have used this parallel resonant LC oscillator circuit countless times.  The oscillator frequency is determined by the inductor and capacitor values.  I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Precision Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by Dave Johnson P.E.-May, 2000

Ten-Second Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by David Johnson P.E.-May, 2000

Ultra Lower Power Oscillator - This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by David A. Johnson P.E.-May, 2000

VCO from CMOS Schmitt Trigger IC - By changing the supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed over a range of 50:1.  A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic level signal . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Very Low Power Astable Multivibrator - This classic circuit draws only 200 nanoamps from a 1.5v supply. . . Circuit by Dave Johnson P.E.-June, 2000

Very Low Voltage Oscillator Circuit - OK, you may not ever need an oscillator to function using a power supply voltage below one volt, but if you ever do need one, here is one way to do it.  Getting any electronic circuit to operate below one volt is a real challenge.  Typical silicon bipolar . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2008


Links to electronic circuits, electronic schematics, designs for engineers, hobbyists, students & inventors:

Oscillator Sawtooth & Square Wave Output -  Simple, Single Supply and Works Very well with Minimum Parts Count.   __ Designed by G.L. Chemelec

Oscillator Turns On Instantly, Off Synchronously -  05/23/96 EDN-Design Ideas - The oscillator in Figure 1 has several desirable features.  You can adjust the oscillator frequency from approximately 500 kHz to 4 MHz, it is fairly stable for an RC type, and it uses inexpensive standard components.  Also, you can easily control the oscillator __ Circuit Design by Raymond Scott, SOR Inc, Lenexa, KS

Over-Temperature Micro-Power Alarm -  The circuit is powered for years by a single 3 volt lithium battery.  It sounds an alarm when the temperature exceeds a certain point.  With some minor changes the circuit could also be configured for an under temperature (freeze) alarm.  The circuit uses a . . . Hobby Circuit designed by David Johnson P.E.-June, 2000

Parallel LC Oscillator with CMOS Inverter  -  I have used this parallel resonant LC oscillator circuit countless times.  The oscillator frequency is determined by the inductor and capacitor values.  I have shown an adjustable inductor to make it easy to set the frequency to a specific value . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Precision Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by Dave Johnson P.E.-May, 2000

Simple Circuit 1.5V Square Wave Generator -  This simple circuit generates a good and stable 1V peak-to-peak square wave at 100Hz, 1KHz and 10KHz using a single 1.5V cell as power supply.   __ 

Simple Circuit Squarewave Generator -  Three switchable frequencies: 100Hz, 1KHz, 10KHz 1.5V battery operated, minimum parts counting __ Contact Flavio Dellepiane, fladello @ tin.it

Square Wave Oscillator -  It has adjustable (and settable) frequencies from 1Hz to 100kHz and is an ideal piece of Test Equipment.  __ 555-Timer

Square Wave Oscillator -  In this page, I introduce the square wave oscillator which used the Schmitt inverter circuit which was made with the CMOS .  The Schmitt inverter circuit has the hysteresis characteristic.  The circuit to introduce is the oscillation circuit which used this characteristic.  By the hysteresis characteristic, the voltage which becomes the H level with the input voltage of the inverter rising from 0 V (Voltage that the output becomes 0 V) and the voltage which becomes the L level, descending from +5 V (Voltage that the output becomes +5 V) are different.   __ Designed by Seiichi Inoue

Square Wave Oscillator -  A very basic square wave generator using a CMOS 4011 NAND gate __ Designed by Andy Collison

Square wave oscillator (2) -  I introduce the square wave oscillation circuit which used the CMOS inverters in this page.  This circuit is the circuit which is often used by the following reason.   __ Designed by Seiichi Inoue

Square wave oscillator using 555 timer chip -  This project is a piece of test equipment.  It's a square wave oscillator with 6 selectable frequencies from 1Hz to 100kHz, incrementing in decade values.  It's most useful application is as a Signal Injector for radios and TV's.  A square wave is the most suitable for testing the IF (Intermediate Frequency) strip as the signal will pass through the IF transformers without any attenuation, no matter what __ Designed by Collin Mitchell

Square Wave to Triangle Wave Converter -  This circuit converts a square waveform to a triangle waveform while automatically maintaining a constant triangle amplitude for a wide range of input frequencies.  Although originally designed for application in a communications system, the idea is readily adaptable for certain electronic music applications where waveform conversion is desired.  Operation is as follows: Transistor Q2 provides a square wave at its collector that has an amplitude controlled by Q1
.   __ Designed by Arthur Harrison

Squarewave Generator -  Three switchable frequencies: 100Hz, 1KHz, 10KHz 1.5V battery operated, minimum parts counting __ Contact Flavio Dellepiane, fladello @ tin.it

Square-wave Modulator has variable frequency & pulse width -  08/08/02 EDN-Design Ideas - A few years ago, I worked at a disk-drive company.  We had a plating facility that required square waves to drive the high-voltage plating operation.  The challenge was that the square wave's pulse width had to be variable, along with the duty cycle.  Also, the amplitude of the pulses had to be adjustable __ Circuit Design by Michael Fisch, Agere Systems, Longmont, CO

SwOpAmp Makes Square-wave Generator -  02/15/96 EDN-Design Ideas - A simple technique provide as phase compensation for the oscillator in Figure 1a.  In this circuit, a tungsten lamp regulates the amplitude of a crystal bridge oscillator.  This type of oscillator produces a very low-distortion output at a very stable frequency.  The op amp must have a __ Circuit Design by Jim Todsen, Burr-Brown Corp Tucson, AZ

Ten-Second Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by David Johnson P.E.-May, 2000

Triangle & Square Wave Generator -  Here is a simple triangle/squarewave generator using a common 1458 dual op-amp that can be used from very low frequencies to about 10 kHz.  The time interval for one half cycle is about R*C and the outputs will supply about 10 milliamps of current.  Triangle amplitude can __ Designed by Bill Bowden

Triangle / Square wave generator -  Transistor Q1, a 2N3563, and its associated components form an oscillator circuit that will oscillate if, and only if, a good crystal is connected to the test clips.  The output from the oscillator is then rectified by the 1N4148 signal diode and filtered by C3, a 100pF capacitor.   __ Designed by Izhar Fareed

Ultra Lower Power Oscillator -  This circuit works much like the classic 555 timer, but draws only about 1.5 microamps from a 3 volt battery.  It is highly stable under varying temperature and supply voltages. . . Circuit by David A. Johnson P.E.-May, 2000

VCO from CMOS Schmitt Trigger IC -  By changing the supply voltage fed to a classic 4584 Schmitt trigger type oscillator, the oscillator frequency can be changed over a range of 50:1.  A 74HCU04 inverter is used at the output of the 4584 to maintain a constant TTL logic level signal . . . Hobby Circuit designed by David A. Johnson P.E.-March, 2002

Very Low Power Astable Multivibrator -  This classic circuit draws only 200 nanoamps from a 1.5v supply. . . Circuit by Dave Johnson P.E.-June, 2000

Very Low Voltage Oscillator Circuit -  OK, you may not ever need an oscillator to function using a power supply voltage below one volt, but if you ever do need one, here is one way to do it.  Getting any electronic circuit to operate below one volt is a real challenge.  Typical silicon bipolar . . . Hobby Circuit designed by Dave Johnson P.E.-October, 2008


Oscillators:  Square Wave:   #'s - N        O - Z

 


Imagineering Ezine    Discover Solar Energy Dave Johnson & Associates Faraday Touch Switches



 About Us   |  Advertise on DiscoverCircuits.com   |   Report Broken Links  |    Link to DiscoverCircuits.com  |   
Privacy Policy


Discovercircuits.com endeavors to credit original designers.   Please alert us by eMail so we can
delete links to material that have been copied without your permission
.   Thank you.


Copyright of all original material on this website is the property
of David A. Johnson, P.E. (Dave Johnson & Associates ) unless otherwise noted.  

Linking is ALLOWED but COPYING any content or graphics to your web site is EXPRESSLY PROHIBITED.
All material is provided "as is" without guarantees or warranty of any kind, either expressed or implied.