Dec 272018

Generator based on good old ICL integrated chip generator that gives pretty good shaped signals as for amateur purposes. This circuit has been designed. Buy low price, high quality icl with worldwide shipping on ICL is a function generator chip which can produce different waveform. ICL can produce highly accurate sine, square, triangular, saw-tooth and pulse.

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It is an irreplaceable tool for troubleshooting and repairing electronic equipment by determining performance and health of electrolytic capacitors.

If this happen, you must increase the capacity of the main filter capacitors or use a more powerful transformer. This signal is fed to the meter, the AVR input pin accepts such signals. Shown cil8038 the schematic LM 1. The two ICL chips that i have can oscillate around up to kHz, and practically we can get good waveforms up to that frequency. Rising edge depends only on the pull-up resistor and its growing very slowly.

ICL icl80338 changes its oscillation frequency depending on the temperature, so when you turn on the generator, wait approximately two minutes until all the elements get heated to they operating temperature and then fine-tune the frequency. Generator based on good old ICL integrated chip generator that gives pretty good shaped signals as for amateur purposes. Sinusoidal signal coming from the ICL is 5.

Offset, amplitude, and frequency scales are pretty accurate. The signal may be larger, it is matched by the same elements that adjust it at the output of the comparator. You can control lights, fans, AC system, computer, printer, amplifier, robots, garage door, security systems, motor-driven curtains, motorized window blinds, door locks, sprinklers, motorized projection screens and anything else you can think of.

Here, i fixed the square wave with a comparator so that the slope is pretty steep, steep as applied comparator can give.

ICL8038 signal gen

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.


Arduino Prototype uses all standard through-hole components for easy construction, two of which are hidden underneath IC socket. It also analyzes transistor’s characteristics such as voltage and gain.

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. Its marked as 10uF bipolar on the schematic, but its good to put bigger one to reduce this effect.

ICL Function Generator

It is a very useful bench test equipment for testing and finding out the frequency of various devices with unknown frequency such as oscillators, radio receivers, transmitters, function generators, crystals, etc. Voltage transformer should have a 2x14V minimum to allow the proper operation of and stabilizers.

The circuit includes an auto ranging as well as reset switch and produces very accurate and stable readings. Sinusoidal ixl8038 triangular waveforms will be passed nice, but we can forget about the square. It’s small, power efficient, yet customizable through onboard 2 x 7 perfboard that can be used for connecting various sensors and connectors.

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Shown generator board allows connection of such a meter, giving him power supply and signal to probe. Additionally In my version of device i added the input mode for the meter, which can be selected on the range switch, and the output connector can be used to measure external signals.

Amplitude and DC offset adjustment Waveforms obtained in this way still need to be fed to the operational amplifier that will allow setting of the amplitude and Icl0838 offset. The meter is a perfect addition to any power supply, battery chargers and other electronic projects where voltage and current must be monitored.


A LM is not even worth of bother. Since the input voltage for the comparator has a greater amplitude than its supply voltage, I decided to fed it icl038 trough the current limiting resistor. Square output pin 9 with open collector, normally would never be able to give a good square wave at these frequencies. The output waveforms can be both amplitude and frequency modulated.


Headphone amplifier is small enough to fit in Altoids tin box, and thanks to low power consumption may be supplied from a single 9V battery. I found a workaround by not putting the load on the square wave output from pin 9 open collector that needs to be pulled up to the power supply. Here, the potentiometer is used as a source of compare voltage for the comparator, set it to get the same signal duty that has been set icl80038 ICL.

Graphics in attachment shows the connections of switches, in this case, I used two rotating ones, 2 x 6 rows each. In some way the quality of other waveforms is dependent on the load on this pin. As it turned out its only making them worse, and add a characteristic spout on the top of the upper half of the sine. 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.

I got rid of some of the elements, I added my own solutions. The frequency meter has been used in this construction, so its completes the whole generator and allows to perform the frequency lcl8038 without using an external meter or oscilloscope.

After stabilize, the frequency can change a bit ICL chip faultbut it iccl8038 not change over time. For example, a cold circuit set to kHz, decreases its frequency by about kHz after warming up.

Shielding, temperature drift Whole electronic circuit is protected by a tin to minimize the impact of the electromagnetic field of a transformer and power lines. This LC Meter allows to measure incredibly small inductances making it perfect tool for making all types of RF coils and inductors. If we give too strong pull-up resistor, in turn, the trailing edge will be weak because the internal transistor is too heavily loaded.