ICL8038

I am playing with my ICL8038 Monolithic Function Signal Generator Module Sine Square Triangle Signal Generators DIY Welding Practice Kit.

This signal generator kit arrived in this mail call: Mail Call: More Loot from AliExpress and eBay! | Learning Electronics In The Lab With Jay Jay

The assembly and test was documented in this video: Electronics Project: ICL8038 Monolithic Function/Signal Generator Kit Build and Test | In The Lab

What I have researched

Here are some notes about the ICs used in this project.

ICL8038

The ICL8038 waveform generator was an integrated circuit by Intersil designed to generate sine, square and triangular waveforms, based on bipolar monolithic technology involving Schottky barrier diodes.

• ICL8038
• Intersil ICL8038
• Intersil Corporation ICL8038 datasheet
• Harris Semiconductor ICL8038 datasheet
• ICL8038 Monolithic Function Signal Generator Module Sine Square Triangle Signal Generators DIY Welding Practice Kit

78L09

Fixed-voltage integrated-circuit voltage regulator.

• 78L09 datasheet
• Wing Shing Computer Components 78L09 datasheet

TL082

High-speed JFET input dual operational amplifiers.

• TL082 datasheet
• STMicroelectronics TL082 datasheet

ICL7660

Switched-Capacitor Voltage Converter.

• ICL7660 datasheet
• Switched-Capacitor Voltage Converter

What I have guessed

Use the 4x2 pin header to set the frequency range.

Use the 2x2 pin header to select triangle or sine wave. (This does not apply to square waves.)

Output jumpers

Note: you can use both square wave and sine/triangle waves at the same time. There is only one set of controls though, so they affect each output concurrently.

1. Ground
2. Square Wave
3. Sine/Triangle Wave

4x2 pin header function

1. 10-100 Hz
2. 100-1k Hz
3. 1k-10k Hz
4. 10k-100k Hz

2x2 pin header function

1. Triangle Wave
2. Sine Wave

Big potentiometer function

Note: DC bias (pot 3) and Amplitude (pot 4) seem to only apply to sine/triangle waves, not square waves.

1. Duty cycle: Adjusting the duty cycle range
2. Frequency regulation: Adjusting the frequency
3. Signal adjustment: Signal DC bias adjustment
4. Amplitude adjustment: sine wave, triangular wave, sawtooth wave amplitude modulation

Small potentiometer function

Does not apply to square waves. I'm not sure really what this is. Seems to affect sine/triangle waves by "squishing" them into points on the top or the bottom of the peaks.

1. Squishy on the top
2. Squishy on the bottom

Instructions

No, I don't speak Chinese... not yet, anyway.

There are some touch-ups over here: https://www.jj5.net/file/2024-07-25-214043/

The hardcopy of these instructions have been filed in Lab Notes Vol 7.

Notes

These are my notes from my notebook scanned in.