A simple function generator circuit with diagram and schematics using ICL, which is a pulse generator IC which generates waveforms of. About the ICL Introduction. The is a function generator capable of producing sine, square, triangular, sawtooth and pulse waveforms (some at. This is the Mini function generator circuit using ICL IC-number. (Precision Waveform Generator/ Voltage Controlled Oscillator) It will generate output 3 the.

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Three trimpots are used to calibrate the quality of the waveforms – two set high frequency and low frequency symmetry, while another trims the distortion of the sine wave. How can we simultaneously set pulse width of to us and frequency of 20 ick8038 30Hz in a rectangular waveform? Nice learning about this circuit.

Generator based on good old ICL integrated chip generator that gives pretty good shaped signals as for amateur purposes. Adjust R23 Min to give 20 Hz. Here both the pins are shorted together and connected to a variable resistor RV1 kaltering the resistance value of RV1 will result in functiion in frequency of the output wave.

Function Generator Circuit using ICL Pulse Generator IC

I got rid of some of the elements, I added my own solutions. It can be connected to any type of stereo audio source such as iPod, Computer, Laptop, CD Player, Walkman, Television, Satellite Receiver, Tape Deck or other stereo system to transmit stereo sound with excellent clarity throughout your home, office, yard or camp ground. This approach turns the audio generator into a handy portable device you can take out to the field or to a gig!

Then this circuit will work. It also analyzes transistor’s characteristics such as voltage and gain.

The large resistor on pin 5 helps reducing the sweep variations with duty cycle. A LM is not even worth of bother. Notify of all new follow-up comments Notify of new replies funcion all my comments. The answer to that question is “Yes. Instead of junking out on positive voltage rails, Thomas fed it a steady diet of good old fashioned negative rail.

The 8038 Audio Generator Project

We’ll start off with the general topology that Thomas has put into place. The resistors Ra and Rb is known as the timing resistorswhere Ra controls the rising portion of the trianglesine and high state of square wave. This is easy to do with ears alone. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored.


Rising edge depends only on the pull-up resistor and its growing very slowly. How to geneeator with it? So, our has been consigned many a time to sit out the game on the bench. The ICL has to be operated from a dual power supply. Imperfections In this article i described how to make a simple front panel its not translated, sorryand beside regular files such as PCB files, i added a ready-to-print design of the front panel in the PDF format, suitable for housing Z1A, in the attachment.

Voltage transformer should have a 2x14V minimum to allow the proper ufnction of and stabilizers.

Once the symmetry is good across the frequency range of the audio generator, R21 is used to trim the distortion of the sine wave to the lowest possible level.

R10 sets the maximum frequency and R23 sets the minimum frequency. This is not a difficult project to build.

ICL8038 Function Generator

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The fujction needs a dual power supply. Frank Donald June 10, 1 Comment. Shielding, ocl8038 drift Whole electronic circuit is protected by a tin to minimize the impact of the electromagnetic field of a transformer and power lines. There is an option to control the parameters like frequency,duty cycle and distortion of these functions.

The following two tabs change content below. While listening to the sine output and watching it on a scope, adjust R21 Sine Distortion Trim for minimal harmonic distortion. As it turned out its only making them worse, and add a characteristic spout on the top of the upper half of the sine. After stabilize, the frequency can change a bit ICL chip faultbut it should not change over time.

Function Generator Circuit using ICL – Gadgetronicx

A small note here, the scale of the amplitude potentiometer can only have a decorative function or you can match it to only one function. Shop around – prices vary widely! As you peruse the schematic, you’ll find the typical elegant economy of of a very effective design that is Thomas’ virtual trademark.


On this page you will find complete plans for the function generator – a schematic, a PCB layout, and plans for a nice, spiffy case to put it in. Notice there are a number of trimpots – these are in place to ensure that the specified frequency range is met, while maintaining the correct linear waveforms of the triangle and sine outputs throughout that range.

If this happen, you must increase the capacity of the main filter capacitors or use a more powerful transformer. Video games, blogging and programming are the things he loves most. That allows you to put it on your bench top and use it to test your audio circuitry.

Even though the marks on Thomas’ panel design are only approximations to help find the ballpark, a better quality coarse pot will put you closer to those marks. On the electronics bench, this input would be great for tests that require a swept oscillator. For example, a cold circuit set to kHz, decreases its frequency by about kHz after warming up. Function Generator Circuit Diagram. The frequency control set consists of a coarse and fine tune arrangement – the coarse control obviously will move the frequency in greater increments, and the fine control allows one to set the frequency exactly at the desired point.

This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors.

Square output pin 9 with open collector, normally would never be able to give a good square wave at these frequencies. In other words, the poor thing can’t help but start out on the wrong foot when someone refers to the datasheet for guidance on how to use the thing. All it needed was a good coach, someone habitual generatro to pluck it off the bench and force it to run wind sprints, stair laps and line drills.

And that certain someone was Coach Henry.