I don’t see the point of a sine wave generator unless it is good enough to be used for distortion testing.

 

What about something built around the ICL8038 chip. Complete modules with this chip are available.
SG
http://www.mit.edu/~6.331/icl8038data.pdf

I think this is very easy and is having multiwaves

 

It’s a question of what you want to use it for. At best the 8038 manages 1% thd. If you are doing anything in audio, then it isn’t good enough, by at least three orders of magnitude.
And if you‘re not doing audio, why do you need a sine wave generator?

 

I can use it to test amplifier and tone controller as well as alarm pitching, I am learning electronics

 

Rh

Hi there, I want to make this power supply for function signal generator, so I can change the amplitude with voltage. The power supply I got online is just fixed.


The input voltage's 12Vac, but outputs by passing the caps, in that schematics 28 volts?.
How it can be?

 

I can use it to test amplifier and tone controller as well as alarm pitching, I am learning electronics

You’d learn far more from Linsley-Hood’s circuit, about analogue design and the applications of op-amps then ever you would wiring up an ICL8038 ( and I bet the op-amps turn out to be cheaper).
knowing how to wire up an ICL8038 as shown in the datasheet doesn’t teach you much, especially as it has been obsolete for Years. I know that there are plenty on eBay, but how many are fakes that don’t work?
And in 30 years in electronics, I can honestly say I’ve never needed a triangle wave.

 

I am learning electronics

Another option that is still available is the XR2206CP.
SG
https://www.jameco.com/Jameco/Products/ProdDS/34972.pdf

 

And the XR2206 has now been obsolete for 13 years.

 

And the XR2206 has now been obsolete for 13 years.

They are still available and they still work.
SG

 

Provided that they are not fakes.

 

Hello,

How about the MAX038?
Futurlec seems to carry them:
https://www.futurlec.com/ICMaxim.shtml

Bertus

 

How about the MAX038?
Futurlec seems to carry them

Oh no you can't use that, it has too much distortion and they are all fakes.

 

Just too much distortion, but rather more recently obsolete!
Note the guidance from Maxim:
https://maximsupport.microsoftcrmportals.com/en-us/knowledgebase/article/000103132

MAX038 waveform generator has been discontinued, and currently there is no pin-compatible alternative. If you need a sine wave, it is recommended that you use a Wien bridge oscillator and an operational amplifier to build the circuit.

Did I mention a Wien bridge?

 

I can use it to test amplifier and tone controller as well as alarm pitching, I am learning electronics

Might be wiser getting a kit if this is going to be a piece of test equipment, depending on your skill level and knowledge. A lot of us started out with kits back in the day when money was tight.
SG
https://www.amazon.com/Generator-KKmoon-Precision-Adjustable-Frequency/dp/B01HM70CMY

 

Currently unavailable.
We don't know when or if this item will be back in stock.

 

Hello,

In the list below, there is one that is available for $9.99:
https://www.amazon.com/Gearwoo-1HZ-...N3TS9QJFZZ6&psc=1&refRID=KFMEJYXMXN3TS9QJFZZ6

Bertus

 

Iano said: Currently unavailable.
The link I posted says in stock. What page were you looking at?
SG

 

Seems I'm one post behind. It's the KKMoon one that's out of stock.

 

It's the KKMoon one that's out of stock.

Amazon says both in stock but only 4 left for the Gearoo.
SG

 

You're welcome to it. Amazon says I can't have one!